A Comprehensive List of Plants by their Common Names with Scientific Names

Plant List

Indexed Alphabetically by Common Name

For a list of plants indexed by Scientific Name, click here

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National Common Name	Scientific Name with Author	Symbol	Family
cabbage	Brassica oleracea L.	BROL	Brassicaceae
cabbage on a stick	Brighamia insignis Gray	BRIN4	Campanulaceae
cabbage tree	Cordyline australis (G. Forst.) Endl.	COAU12	Liliaceae
cabbagebark tree	Andira inermis (W. Wright) Kunth ex DC.	ANIN	Fabaceae
cabellos de angel	Clematis dioica L.	CLDI3	Ranunculaceae
cabra blanca	Chionanthus ligustrinus (Sw.) Pers.	CHLI6	Oleaceae
cacaliopsis	Cacaliopsis Gray	CACAL4	Asteraceae
cachiyuyo	Atriplex atacamensis Phil.	ATAT2	Chenopodiaceae
cactus flat gilia	Aliciella heterostyla (S. Cochrane & Day) J.M. Porter	ALHE3	Polemoniaceae
cadaba	Cadaba farinosa Forsskal	CAFA4	Capparaceae
cadaba	Cadaba Forsskal	CADAB	Capparaceae
Caddo false foxglove	Agalinis caddoensis Pennell	AGCA8	Scrophulariaceae
cadillo	Acaena myriophylla Lindl.	ACMY3	Rosaceae
caelogyne	Caelogyne Lindl.	CAELO2	Orchidaceae
cafe falso	Bunchosia glandulifera (Jacq.) Kunth	BUGL2	Malpighiaceae
cafe forastero	Bunchosia glandulosa (Cav.) DC.	BUGL	Malpighiaceae
Cahaba Indian paintbrush	Castilleja kraliana J. Allison	CAKR4	Scrophulariaceae
caimitillo	Chrysophyllum mexicanum Brandegee ex Standl.	CHME10	Sapotaceae
Cain's reedgrass	Calamagrostis cainii A.S. Hitchc.	CACA2	Poaceae
Cainville thistle	Cirsium calcareum (M.E. Jones) Woot. & Standl.	CICA10	Asteraceae
cajanus	Cajanus Adans.	CAJAN	Fabaceae
caladium	Caladium Vent.	CALAD	Araceae
calamint	Calamintha P. Mill.	CALAM4	Lamiaceae
calammophila	×Calammophila Brand	CALAM6	Poaceae
calamondin	Citrus madurensis Lour.	CIMA9	Rutaceae
calamus	Acorus calamus L.	ACCA4	Acoraceae
calamus	Calamus caesius Blume	CACA72	Arecaceae
calamus	Calamus deerratus Mann & H. A. Wendl.	CADE28	Arecaceae
calamus	Calamus L.	CALAM5	Arecaceae
calathea	Calathea G.F.W. Mey.	CALAT	Marantaceae
calcareous brachythecium moss	Brachythecium calcareum Kindb.	BRCA70	Brachytheciaceae
calcareous cryptantha	Cryptantha thyrsiflora (Greene) Payson	CRTH	Boraginaceae
calcareous rimmed lichen	Aspicilia calcarea (L.) Mudd	ASCA38	Hymeneliaceae
Calder's rockcress	Arabis calderi G. Mulligan	ARCA48	Brassicaceae
calibrachoa	Calibrachoa Llave & Lex.	CALIB	Solanaceae
Caliche sandmat	Chamaesyce velleriflora (Klotzsch & Garcke) Millsp.	CHVE11	Euphorbiaceae
calicoplant	Alternanthera bettzichiana (Regel) Voss	ALBE	Amaranthaceae
California alsia moss	Alsia californica (Hook. & Arnott) Sull.	ALCA19	Leucodontaceae
California amaranth	Amaranthus californicus (Moq.) S. Wats.	AMCA	Amaranthaceae
California amphidium moss	Amphidium californicum (Hampe ex C. Müll.) Broth.	AMCA13	Orthotrichaceae
California angelica	Angelica californica Jepson	ANCA32	Apiaceae
California antitrichia moss	Antitrichia californica Sull. in Lesq.	ANCA37	Leucodontaceae
California ayenia	Ayenia compacta Rose	AYCO	Sterculiaceae
California balsamroot	Balsamorhiza macrolepis Sharp	BAMA3	Asteraceae
California balsamroot	Balsamorhiza macrolepis Sharp var. macrolepis	BAMAM	Asteraceae
California balsamroot	Balsamorhiza macrolepis Sharp var. platylepis (Sharp) Ferris	BAMAP	Asteraceae
California bastard toadflax	Comandra umbellata (L.) Nutt. ssp. californica (Eastw. ex Rydb.) Piehl	COUMC	Santalaceae
California bearpoppy	Arctomecon californica Torr. & Frém.	ARCA4	Papaveraceae
California bentgrass	Agrostis densiflora Vasey	AGDE7	Poaceae
California boxelder	Acer negundo L. var. californicum (Torr. & Gray) Sarg.	ACNEC2	Aceraceae
California brickellbush	Brickellia californica (Torr. & Gray) Gray	BRCA3	Asteraceae
California brickellbush	Brickellia californica (Torr. & Gray) Gray var. californica	BRCAC	Asteraceae
California brodiaea	Brodiaea californica Lindl.	BRCA4	Liliaceae
California brodiaea	Brodiaea californica Lindl. ssp. californica	BRCAC9	Liliaceae
California brodiaea	Brodiaea californica Lindl. ssp. leptandra (Greene) J.C. Pires	BRCAL3	Liliaceae
California brome	Bromus carinatus Hook. & Arn.	BRCA5	Poaceae
California buckeye	Aesculus californica (Spach) Nutt.	AECA	Hippocastanaceae
California cholla	Cylindropuntia californica (Torr. & Gray) F.M. Knuth	CYCA25	Cactaceae
California clematis	Clematis ligusticifolia Nutt. var. californica S. Wats.	CLLIC	Ranunculaceae
California copperleaf	Acalypha californica Benth.	ACCA3	Euphorbiaceae
California cracked lichen	Acarospora californica Zahlbr.	ACCA15	Acarosporaceae
California croton	Croton californicus Muell.-Arg.	CRCA5	Euphorbiaceae
California croton	Croton californicus Muell.-Arg. var. californicus	CRCAC	Euphorbiaceae
California croton	Croton californicus Muell.-Arg. var. tenuis (S. Wats.) Ferguson	CRCAT	Euphorbiaceae
California dutchman's pipe	Aristolochia californica Torr.	ARCA10	Aristolochiaceae
California false indigo	Amorpha californica Nutt.	AMCA5	Fabaceae
California false indigo	Amorpha californica Nutt. var. californica	AMCAC	Fabaceae
California goosefoot	Chenopodium californicum (S. Wats.) S. Wats.	CHCA3	Chenopodiaceae
California groundcone	Boschniakia strobilacea Gray	BOST2	Orobanchaceae
California harebell	Asyneuma prenanthoides (Dur.) McVaugh	ASPR10	Campanulaceae
California hazelnut	Corylus cornuta Marsh. var. californica (A. DC.) Sharp	COCOC	Betulaceae
California lacefern	Aspidotis californica (Hook.) Nutt. ex Copeland	ASCA5	Pteridaceae
California lady's slipper	Cypripedium californicum Gray	CYCA4	Orchidaceae
California maidenhair	Adiantum jordanii C. Muell.	ADJO	Pteridaceae
California milkweed	Asclepias californica Greene	ASCA3	Asclepiadaceae
California milkweed	Asclepias californica Greene ssp. californica	ASCAC3	Asclepiadaceae
California needlegrass	Achnatherum occidentale (Thurb.) Barkworth ssp. californicum (Merr. & Burtt-Davey) Barkworth	ACOCC	Poaceae
California orange lichen	Caloplaca californica Zahlbr.	CACA60	Teloschistaceae
California prickbush	Adolphia californica S. Wats.	ADCA2	Rhamnaceae
California pricklypear	Cylindropuntia californica (Torr. & Gray) F.M. Knuth var. californica	CYCAC	Cactaceae
California red fir	Abies magnifica A. Murr.	ABMA	Pinaceae
California redbud	Cercis orbiculata Greene	CEOR9	Fabaceae
California rockcress	Arabis sparsiflora Nutt. var. californica Rollins	ARSPC	Brassicaceae
California rockflower	Crossosoma californicum Nutt.	CRCA4	Crossosomataceae
California rockjasmine	Androsace elongata L.	ANEL2	Primulaceae
California rockjasmine	Androsace elongata L. ssp. acuta (Greene) G.T. Robbins	ANELA	Primulaceae
California saltbush	Atriplex californica Moq.	ATCA	Chenopodiaceae
California sandaster	Corethrogyne filaginifolia (Hook. & Arn.) Nutt. var. californica (DC.) J.P. Saroyan	COFIC	Asteraceae
California sawgrass	Cladium californicum (S. Wats.) O'Neill	CLCA2	Cyperaceae
California seapink	Armeria maritima (P. Mill.) Willd. ssp. californica (Boiss.) Porsild	ARMAC2	Plumbaginaceae
California sedge	Carex californica Bailey	CACA9	Cyperaceae
California silverbush	Argythamnia californica Brandeg.	ARCA19	Euphorbiaceae
California spikenard	Aralia californica S. Wats.	ARCA2	Araliaceae
California suncup	Camissonia californica (Nutt. ex Torr. & Gray) Raven	CACA32	Onagraceae
California threeawn	Aristida californica Thurb. ex S. Wats.	ARCA9	Poaceae
California threeawn	Aristida californica Thurb. ex S. Wats. var. californica	ARCAC8	Poaceae
California tickseed	Coreopsis californica (Nutt.) H.K. Sharsmith	COCA8	Asteraceae
California tickseed	Coreopsis californica (Nutt.) H.K. Sharsmith var. californica	COCAC4	Asteraceae
California yarrow	Achillea millefolium L. var. californica (Pollard) Jepson	ACMIC	Asteraceae
Calistoga ceanothus	Ceanothus divergens Parry	CEDI	Rhamnaceae
callaeum	Callaeum Small	CALLA2	Malpighiaceae
callalily	Calla L.	CALLA	Araceae
Callaway milkvetch	Astragalus callithrix Barneby	ASCA8	Fabaceae
callicladium moss	Callicladium Crum	CALLI9	Hypnaceae
callicladium moss	Callicladium haldanianum (Grev.) Crum	CAHA32	Hypnaceae
callicostella moss	Callicostella (C. Müll.) Mitt.	CALLI13	Callicostaceae
calliergon moss	Calliergon (Sull.) Kindb.	CALLI10	Amblystegiaceae
calliergon moss	Calliergon cordifolium (Hedw.) Kindb.	CACO70	Amblystegiaceae
calliergon moss	Calliergon megalophyllum Mik.	CAME30	Amblystegiaceae
calliergon moss	Calliergon obtusifolium Karcz.	CAOB11	Amblystegiaceae
calliergon moss	Calliergon orbicularicordatum (Ren. & Card.) Broth.	CAOR18	Amblystegiaceae
calliergon moss	Calliergon stramineum (Brid.) Kindb.	CAST70	Amblystegiaceae
calliergon moss	Calliergon trifarium (Web. & Mohr) Kindb.	CATR27	Amblystegiaceae
calliergonella moss	Calliergonella cuspidata (Hedw.) Loeske	CACU18	Amblystegiaceae
calliergonella moss	Calliergonella Loeske	CALLI11	Amblystegiaceae
callistephus	Callistephus Cass.	CALLI8	Asteraceae
Call's angelica	Angelica callii Mathias & Constance	ANCA13	Apiaceae
caloncoba	Caloncoba echinata (Oliver) Gilg	CAEC2	Flacourtiaceae
caloncoba	Caloncoba Gilg	CALON	Flacourtiaceae
calopadia lichen	Calopadia fusca (Mull. Arg.) Vezda	CAFU5	Ectolechiaceae
calopadia lichen	Calopadia Vezda	CALOP5	Ectolechiaceae
calophyllum	Calophyllum cholobtaches Laut.	CACH34	Clusiaceae
calophyllum	Calophyllum L.	CALOP	Clusiaceae
calopo	Calopogonium mucunoides Desv.	CAMU11	Fabaceae
calopogonium	Calopogonium Desv.	CALOP3	Fabaceae
calotis	Calotis R. Br.	CALOT2	Asteraceae
calotropis	Calotropis R. Br.	CALOT	Asclepiadaceae
calycera	Calycera Cav.	CALYC10	Calyceraceae
calycocarpum	Calycocarpum (Nutt.) Spach	CALYC2	Menispermaceae
calycophyllum	Calycophyllum DC.	CALYC9	Rubiaceae
calymperes moss	Calymperes erosum C. Müll.	CAER7	Calymperaceae
calymperes moss	Calymperes Sw. in Web.	CALYM	Calymperaceae
calymperes moss	Calymperes tenerum C. Müll.	CATE25	Calymperaceae
calyptocarpus	Calyptocarpus Less.	CALYP2	Asteraceae
camas	Camassia Lindl.	CAMAS	Liliaceae
camasey terciopelo	Clidemia cymosa (Wendl. ex Spreng.) Alain	CLCY5	Melastomataceae
Camatta Canyon amole	Chlorogalum purpureum Brandeg. var. reductum Hoover	CHPUR	Liliaceae
camel grass	Cymbopogon schoenanthus (L.) Spreng. [excluded]	CYSC8	Poaceae
camellia	Camellia japonica L.	CAJA9	Theaceae
camellia	Camellia L.	CAMEL2	Theaceae
camel's foot	Bauhinia esculenta Burchell	BAES	Fabaceae
camelthorn	Acacia erioloba E. Mey.	ACER4	Fabaceae
camelthorn	Alhagi maurorum Medik.	ALMA12	Fabaceae
camito de perro	Chrysophyllum pauciflorum Lam.	CHPA31	Sapotaceae
camphortree	Cinnamomum camphora (L.) J. Presl	CICA	Lauraceae
Campo clarkia	Clarkia delicata (Abrams) A. Nels. & J.F. Macbr.	CLDE2	Onagraceae
campsis	Campsis Lour.	CAMPS	Bignoniaceae
camptotheca	Camptotheca acuminata Decne.	CAAC12	Cornaceae
camptotheca	Camptotheca Decne.	CAMPT2	Cornaceae
campylium moss	Campylium (Sull.) Mitt.	CAMPY3	Amblystegiaceae
campylium moss	Campylium polygamum (Schimp. in B.S.G.) C. Jens.	CAPO17	Amblystegiaceae
campylium moss	Campylium radicale (P. Beauv.) Grout	CARA18	Amblystegiaceae
campylopodiella moss	Campylopodiella Card.	CAMPY8	Dicranaceae
campylopodiella moss	Campylopodiella stenocarpa (Wils. in Seem.) P. Müll. & J.-P. Frahm	CAST49	Dicranaceae
campylopus moss	Campylopus angustiretis (Aust.) Lesq. & James	CAAN27	Dicranaceae
campylopus moss	Campylopus arctocarpus (Hornsch.) Mitt.	CAAR41	Dicranaceae
campylopus moss	Campylopus atrovirens De Not.	CAAT16	Dicranaceae
campylopus moss	Campylopus atrovirens De Not. var. cucullatifolius J.-P. Frahm	CAATC3	Dicranaceae
campylopus moss	Campylopus aureus Bosch & Sande Lac.	CAAU20	Dicranaceae
campylopus moss	Campylopus Brid.	CAMPY4	Dicranaceae
campylopus moss	Campylopus flexuosus (Hedw.) Brid.	CAFL35	Dicranaceae
campylopus moss	Campylopus introflexus (Hedw.) Brid.	CAIN45	Dicranaceae
campylopus moss	Campylopus pilifer Brid.	CAPI17	Dicranaceae
campylopus moss	Campylopus pyriformis (Schultz) Brid.	CAPY9	Dicranaceae
campylopus moss	Campylopus subulatus Schimp. in Rabenh.	CASU55	Dicranaceae
campylopus moss	Campylopus zygodonticarpus (C. Müll.) Par.	CAZY	Dicranaceae
campylostelium moss	Campylostelium Bruch & Schimp. in B.S.G.	CAMPY5	Ptychomitriaceae
campylostelium moss	Campylostelium saxicola (Web. & Mohr) Bruch & Schimp. in B.S.G.	CASA30	Ptychomitriaceae
camwood	Baphia nitida Lodd.	BANI3	Fabaceae
cana de India	Costus guanaiensis Rusby	COGU	Costaceae
cana de India	Costus guanaiensis Rusby var. macrostrobilus (K. Schum.) Maas	COGUM	Costaceae
Canada cracked lichen	Acarospora canadensis H. Magn.	ACCA16	Acarosporaceae
Canada eggyolk lichen	Candelariella canadensis H. Magn.	CACA67	Candelariaceae
Canada thistle	Cirsium arvense (L.) Scop.	CIAR4	Asteraceae
Canadian anemone	Anemone canadensis L.	ANCA8	Ranunculaceae
Canadian honewort	Cryptotaenia canadensis (L.) DC.	CRCA9	Apiaceae
Canadian horseweed	Conyza canadensis (L.) Cronq.	COCA5	Asteraceae
Canadian horseweed	Conyza canadensis (L.) Cronq. var. canadensis	COCAC3	Asteraceae
Canadian horseweed	Conyza canadensis (L.) Cronq. var. glabrata (Gray) Cronq.	COCAG	Asteraceae
Canadian horseweed	Conyza canadensis (L.) Cronq. var. pusilla (Nutt.) Cronq.	COCAP3	Asteraceae
Canadian milkvetch	Astragalus canadensis L.	ASCA11	Fabaceae
Canadian milkvetch	Astragalus canadensis L. var. canadensis	ASCAC6	Fabaceae
Canadian pussytoes	Antennaria howellii Greene ssp. canadensis (Greene) Bayer	ANHOC	Asteraceae
Canadian serviceberry	Amelanchier canadensis (L.) Medik.	AMCA4	Rosaceae
Canadian wildginger	Asarum canadense L.	ASCA	Aristolochiaceae
canarina	Canarina L.	CANAR3	Campanulaceae
Canary bryum moss	Bryum canariense Brid.	BRCA22	Bryaceae
Canary Island flatpod	Adenocarpus foliolosus (Aiton) DC.	ADFO2	Fabaceae
canarybird-bush	Crotalaria agatiflora Schweinf.	CRAG2	Fabaceae
Canby's angelica	Angelica canbyi Coult. & Rose	ANCA11	Apiaceae
cancer-root	Conopholis Wallr.	CONOP	Orobanchaceae
candelabra aloe	Aloe arborescens Miller	ALAR8	Aloaceae
candelabra wattle	Acacia holosericea A. Cunn. ex G. Don	ACHO2	Fabaceae
candelina lichen	Candelina Poelt	CANDE4	Candelariaceae
candelina lichen	Candelina submexicana (de Lesd.) Poelt	CASU41	Candelariaceae
candle anemone	Anemone cylindrica Gray	ANCY	Ranunculaceae
candle cholla	Cylindropuntia kleiniae (DC.) F.M. Knuth	CYKL	Cactaceae
cane	Arundinaria Michx.	ARUND2	Poaceae
cane bluestem	Bothriochloa barbinodis (Lag.) Herter	BOBA3	Poaceae
canelillo	Aniba bracteata (Nees) Mez	ANBR7	Lauraceae
canereed	Costus speciosus (Koenig) Sm.	COSP8	Costaceae
canihua	Chenopodium pallidicaule Aellen	CHPA23	Chenopodiaceae
canna	Canna L.	CANNA2	Cannaceae
canna lily	Canna ×generalis Bailey (pro sp.) [glauca × indica]	CAGE3	Cannaceae
cannonball tree	Couroupita Aubl.	COURO	Lecythidaceae
cannonball tree	Couroupita guianensis Aubl.	COGU3	Lecythidaceae
canoe milkvetch	Astragalus cymboides M.E. Jones	ASCY2	Fabaceae
canoparmelia lichen	Canoparmelia crozalsiana (de Lesd. ex Harm.) Elix & Hale	CACR23	Parmeliaceae
canoparmelia lichen	Canoparmelia cryptochlorophaea (Hale) Elix & Hale	CACR24	Parmeliaceae
canoparmelia lichen	Canoparmelia Elix & Hale	CANOP2	Parmeliaceae
canoparmelia lichen	Canoparmelia martinicana (Nyl.) Elix & Hale	CAMA39	Parmeliaceae
canoparmelia lichen	Canoparmelia salacinifera (Hale) Elix & Hale	CASA25	Parmeliaceae
canotia	Canotia Torr.	CANOT	Celastraceae
cantala	Agave cantala Roxb.	AGCA9	Agavaceae
cantaloupe	Cucumis melo L.	CUME	Cucurbitaceae
Canterbury bells	Campanula medium L.	CAME20	Campanulaceae
cantua	Cantua Juss. ex Lam.	CANTU	Polemoniaceae
canyon clarkia	Clarkia epilobioides (Nutt. ex Torr. & Gray) A. Nels. & J.F. Macbr.	CLEP	Onagraceae
canyon cryptantha	Cryptantha tenuis (Eastw.) Payson	CRTE8	Boraginaceae
canyon dodder	Cuscuta ceanothi Behr	CUCE2	Cuscutaceae
canyon maple	Acer grandidentatum Nutt. var. sinuosum (Rehd.) Little	ACGRS	Aceraceae
cap lichen	Baeomyces carneus Florke	BACA10	Baeomycetaceae
cap lichen	Baeomyces Pers.	BAEOM2	Baeomycetaceae
cap lichen	Baeomyces placophyllus Ach.	BAPL60	Baeomycetaceae
cap lichen	Baeomyces rufus (Hudson) Rebent.	BARU5	Baeomycetaceae
caparosa	Callicarpa ampla Schauer	CAAM14	Verbenaceae
Cape African-queen	Anisodontea capensis (L.) Bates	ANCA46	Malvaceae
Cape aloe	Aloe ferox Miller	ALFE2	Aloaceae
Cape bugloss	Anchusa capensis Thunb.	ANCA29	Boraginaceae
Cape marigold	Castalis tragus (Ait.) Norl.	CATR18	Asteraceae
Cape pondweed	Aponogeton distachyos L. f.	APDI	Aponogetonaceae
Cape Province pygmyweed	Crassula multicava Lem.	CRMU10	Crassulaceae
Cape ricegrass	Achnatherum capense (Thunb.) Beauv.	ACCA34	Poaceae
Cape Sable thoroughwort	Chromolaena frustrata (B.L. Robins.) King & H.E. Robins.	CHFR4	Asteraceae
Cape Sable whiteweed	Ageratum littorale Gray	AGLI3	Asteraceae
Cape-chestnut	Calodendrum capense Thunb.	CACA88	Rutaceae
caper	Capparis baducca L.	CABA2	Capparaceae
caper	Capparis L.	CAPPA	Capparaceae
caper	Capparis spinosa L. [excluded]	CASP28	Capparaceae
Capeweed	Arctotheca calendula (L.) Levyns	ARCA45	Asteraceae
Capeweed	Arctotheca J.C. Wendl.	ARCTO11	Asteraceae
capillary hairsedge	Bulbostylis ciliatifolia (Ell.) Fern.	BUCI	Cyperaceae
capillary hairsedge	Bulbostylis ciliatifolia (Ell.) Fern. var. ciliatifolia	BUCIC2	Cyperaceae
capillary hairsedge	Bulbostylis ciliatifolia (Ell.) Fern. var. coarctata (Ell.) Kral	BUCIC	Cyperaceae
capitate cryptantha	Cryptantha capitata (Eastw.) I.M. Johnston	CRCA13	Boraginaceae
capitate sedge	Carex capitata L.	CACA13	Cyperaceae
capitate sedge	Carex capitata L. ssp. arctogena (H. Sm.) Hiitonen	CACAA2	Cyperaceae
capitate sedge	Carex capitata L. ssp. capitata	CACAC7	Cyperaceae
capraria	Capraria L.	CAPRA2	Scrophulariaceae
capsella	Capsella Medik.	CAPSE	Brassicaceae
cara de caballo	Aglaonema pictum (Roxb.) Kunth	AGPI2	Araceae
Caracas rattlebox	Crotalaria micans Link	CRMI9	Fabaceae
caralluma	Caralluma R. Br.	CARAL	Asclepiadaceae
carambola	Averrhoa carambola L.	AVCA	Oxalidaceae
carapa	Carapa Aublet	CARAP2	Meliaceae
caraway	Carum carvi L.	CACA19	Apiaceae
carbonea lichen	Carbonea (Hertel) Hertel	CARBO2	Lecanoraceae
carbonea lichen	Carbonea atronivea (Arnold) Hertel	CAAT21	Lecanoraceae
carbonea lichen	Carbonea vitellinaria (Nyl.) Hertel	CAVI19	Lecanoraceae
carbonea lichen	Carbonea vorticosa (Florke) Hertel	CAVO60	Lecanoraceae
cardamom	Amomum Roxb.	AMOMU	Zingiberaceae
cardinal's feather	Acalypha radians Torr.	ACRA	Euphorbiaceae
cardionema	Cardionema DC.	CARDI	Caryophyllaceae
cardoon	Cynara cardunculus L.	CYCA	Asteraceae
Cardot's campylium moss	Campylium cardotii (Thér. in Holz.) Broth.	CACA76	Amblystegiaceae
carelessweed	Amaranthus palmeri S. Wats.	AMPA	Amaranthaceae
Carey's balsamroot	Balsamorhiza careyana Gray	BACA3	Asteraceae
Carey's balsamroot	Balsamorhiza careyana Gray var. careyana	BACAC	Asteraceae
Carey's sedge	Carex careyana Torr. ex Dewey	CACA14	Cyperaceae
Caribbean canna	Canna jaegeriana Urban	CAJA13	Cannaceae
Caribbean dot lichen	Arthonia caribaea (Ach.) A. Massal.	ARCA36	Arthoniaceae
Caribbean flatsedge	Cyperus calcicola Britt.	CYCA18	Cyperaceae
Caribbean hairsedge	Bulbostylis junciformis (Kunth) C.B. Clarke	BUJU2	Cyperaceae
Caribbean milkweed	Asclepias nivea L.	ASNI3	Asclepiadaceae
Caribbean myrtlecroton	Bernardia dichotoma (Willd.) Muell.-Arg.	BEDI2	Euphorbiaceae
Caribbean sedge	Carex polystachya Sw. ex Wahlenb.	CAPO5	Cyperaceae
Caribbean spiritweed	Aegiphila martinicensis Jacq.	AEMA	Verbenaceae
Caribbean spleenwort	Asplenium rhomboidale Desv.	ASRH4	Aspleniaceae
Caribbean strap airplant	Catopsis nitida (Hook.) Griseb.	CANI6	Bromeliaceae
Caribbean swallow-wort	Cynanchum anegadense (Britt.) Alain	CYAN4	Asclepiadaceae
Caribbean thoroughwort	Chromolaena corymbosa (Aubl.) King & H.E. Robins.	CHCO9	Asteraceae
carica	Carica monoica Desf.	CAMO28	Caricaceae
carissa	Carissa L.	CARIS	Apocynaceae
Carleton's sand verbena	Abronia carletonii Coult. & Fisher	ABCA	Nyctaginaceae
carline thistle	Carlina L.	CARLI	Asteraceae
carline thistle	Carlina vulgaris L.	CAVU3	Asteraceae
carline thistle	Carlina vulgaris L. ssp. longifolia Nyman	CAVUL	Asteraceae
Carlott's horsehair lichen	Bryoria carlottae Brodo & D. Hawksw.	BRCA15	Parmeliaceae
Carlson's cyanea	Cyanea hamatiflora Rock ssp. carlsonii (Rock) Lammers	CYHAC	Campanulaceae
carludovica	Carludovica Ruiz & Pavón	CARLU	Cyclanthaceae
Carmel ceanothus	Ceanothus griseus (Trel.) McMinn	CEGR2	Rhamnaceae
carmichaelia	Carmichaelia R. Br.	CARMI2	Fabaceae
Carmichael's monkshood	Aconitum carmichaelii Debeaux	ACCA20	Ranunculaceae
carminatia	Carminatia Moc. ex DC.	CARMI	Asteraceae
carnauba wax palm	Copernicia prunifera (Miller) H. Moore	COPR6	Arecaceae
Carnegie's cracked lichen	Acarospora carnegiei Zahlbr.	ACCA17	Acarosporaceae
caro de tres hojas	Cissus erosa L.C. Rich.	CIER	Vitaceae
Carolina anemone	Anemone caroliniana Walt.	ANCA9	Ranunculaceae
Carolina bruchia moss	Bruchia carolinae Aust.	BRCA19	Bruchiaceae
Carolina campylopus moss	Campylopus carolinae Grout	CACA77	Dicranaceae
Carolina canoparmelia lichen	Canoparmelia caroliniana (Nyl.) Elix & Hale	CACA68	Parmeliaceae
Carolina coralbead	Cocculus carolinus (L.) DC.	COCA	Menispermaceae
Carolina cup lichen	Cladonia caroliniana Tuck.	CLCA11	Cladoniaceae
Carolina dayflower	Commelina caroliniana Walt.	COCA17	Commelinaceae
Carolina doll's daisy	Boltonia caroliniana (Walt.) Fern.	BOCA2	Asteraceae
Carolina fanwort	Cabomba caroliniana Gray	CACA	Cabombaceae
Carolina fanwort	Cabomba caroliniana Gray var. caroliniana	CACAC4	Cabombaceae
Carolina fanwort	Cabomba caroliniana Gray var. pulcherrima Harper	CACAP	Cabombaceae
Carolina foxtail	Alopecurus carolinianus Walt.	ALCA4	Poaceae
Carolina hawthorn	Crataegus arcana Beadle	CRAR7	Rosaceae
Carolina milkweed	Asclepias cinerea Walt.	ASCI5	Asclepiadaceae
Carolina mosquitofern	Azolla caroliniana Willd.	AZCA	Azollaceae
Carolina orange lichen	Caloplaca carolinae H. Magn.	CACA63	Teloschistaceae
Carolina sedge	Carex caroliniana Schwein.	CACA15	Cyperaceae
Carolina springbeauty	Claytonia caroliniana Michx.	CLCA	Portulacaceae
Carolina springbeauty	Claytonia caroliniana Michx. var. caroliniana	CLCAC	Portulacaceae
Carolina springbeauty	Claytonia caroliniana Michx. var. lewisii McNeill	CLCAL	Portulacaceae
carpet grass	Axonopus suffultus (J. C. Mikan ex Trin.) Parodi	AXSU2	Poaceae
carpetgrass	Axonopus Beauv.	AXONO	Poaceae
carpetgrass	Axonopus scoparius (Fluegge) Hitchc.	AXSC	Poaceae
carpgrass	Arthraxon Beauv.	ARTHR	Poaceae
carpobrotus	Carpobrotus N.E. Br.	CARPO	Aizoaceae
carrasco	Comocladia glabra (J.A. Schultes) Spreng.	COGL4	Anacardiaceae
Carrizo Mountain sandmat	Chamaesyce pediculifera (Engelm.) Rose & Standl.	CHPE9	Euphorbiaceae
carrot burr parsley	Caucalis platycarpos L.	CAPL11	Apiaceae
carrotwood	Cupaniopsis anacardioides (A. Rich.) Radlk.	CUAN4	Sapindaceae
carrotwood	Cupaniopsis Radlk.	CUPAN2	Sapindaceae
Carruth's sagewort	Artemisia carruthii Wood ex Carruth.	ARCA14	Asteraceae
Carson Range rockcress	Arabis tiehmii Rollins	ARTI2	Brassicaceae
Carter's orchid	Basiphyllaea corallicola (Small) Ames	BACO2	Orchidaceae
carum	Carum L.	CARUM	Apiaceae
caryocar	Caryocar F. Allam. ex L.	CARYO2	Caryocaraceae
caryopteris	Caryopteris Bunge	CARYO3	Verbenaceae
casasia	Casasia A. Rich.	CASAS	Rubiaceae
cascabelillo alado	Crotalaria stipularia Desv.	CRST4	Fabaceae
cascabelillo axilar	Crotalaria lotifolia L.	CRLO4	Fabaceae
Cascade Lake ceanothus	Ceanothus ×serrulatus McMinn (pro sp.) [cordulatus × prostratus]	CESE	Rhamnaceae
Cascade onion	Allium cratericola Eastw.	ALCR3	Liliaceae
Cascade orange lichen	Caloplaca cascadensis H. Magn.	CACA64	Teloschistaceae
Cascade rockbrake	Cryptogramma cascadensis E.R. Alverson	CRCA23	Pteridaceae
cascarilla	Croton eluteria (L.) Sw.	CREL7	Euphorbiaceae
casearia	Casearia Jacq.	CASEA	Flacourtiaceae
Case's milkvetch	Astragalus casei Gray ex Brewer & S. Wats.	ASCA14	Fabaceae
cashew	Anacardium occidentale L.	ANOC	Anacardiaceae
cassia	Cassia L.	CASSI	Fabaceae
cassia	Cinnamomum aromaticum Nees	CIAR8	Lauraceae
cassine	Cassine L.	CASSI2	Celastraceae
cassipourea	Cassipourea Aubl.	CASSI4	Rhizophoraceae
cassytha	Cassytha L.	CASSY	Lauraceae
castalis	Castalis Cass.	CASTA4	Asteraceae
castela	Castela Turp.	CASTE2	Simaroubaceae
Castetter's milkvetch	Astragalus castetteri Barneby	ASCA16	Fabaceae
castilla	Castilla Cerv.	CASTI	Moraceae
castilla	Castilla elastica Sesse ssp. costaricana (Liebm.) C. C. Berg	CAELC	Moraceae
castilloa rubber	Castilla elastica Sesse ssp. elastica	CAELE2	Moraceae
Castle Crags bellflower	Campanula shetleri Heckard	CASH3	Campanulaceae
castrate carpgrass	Arthraxon castratus (Griffiths) Naray. ex Bor	ARCA34	Poaceae
Catalina Island mountain mahogany	Cercocarpus traskiae Eastw.	CETR4	Rosaceae
Catalina orange lichen	Caloplaca catalinae H. Magn.	CACA66	Teloschistaceae
catalpa	Catalpa Scop.	CATAL	Bignoniaceae
catasetum	Catasetum Rich. ex Kunth	CATAS2	Orchidaceae
catbells	Baptisia perfoliata (L.) R. Br. ex Ait. f.	BAPE3	Fabaceae
catch and keep	Acacia retusa (Jacq.) Howard	ACRE4	Fabaceae
catch me if you can	Acalypha amentacea Roxb.	ACAM2	Euphorbiaceae
catclaw acacia	Acacia greggii Gray	ACGR	Fabaceae
catclaw acacia	Acacia greggii Gray var. greggii	ACGRG3	Fabaceae
catclaw acacia	Acacia greggii Gray var. wrightii (Benth.) Isely	ACGRW	Fabaceae
catechu tree	Acacia polyacantha Willd.	ACPO3	Fabaceae
Catesby's false bindweed	Calystegia catesbeiana Pursh	CACA101	Convolvulaceae
catha	Catha Forsskal ex Scop.	CATHA2	Celastraceae
catillaria lichen	Catillaria A. Massal.	CATIL	Catillariaceae
catillaria lichen	Catillaria chalybeia (Borrer) A. Massal.	CACH28	Catillariaceae
catillaria lichen	Catillaria cupressi Zahlbr.	CACU15	Catillariaceae
catillaria lichen	Catillaria endochroma (Fee) Zahlbr.	CAEN5	Catillariaceae
catillaria lichen	Catillaria flavens (Willey) Fink	CAFL33	Catillariaceae
catillaria lichen	Catillaria franciscana (Tuck.) Herre	CAFR18	Catillariaceae
catillaria lichen	Catillaria glauconigrans (Tuck.) Hasse	CAGL26	Catillariaceae
catillaria lichen	Catillaria jemtlandica Th. Fr. & Almq.	CAJE4	Catillariaceae
catillaria lichen	Catillaria lenticularis (Ach.) Th. Fr.	CALE42	Catillariaceae
catillaria lichen	Catillaria leptocheila (Tuck.) Riddle	CALE43	Catillariaceae
catillaria lichen	Catillaria muscicola Lynge	CAMU20	Catillariaceae
catillaria lichen	Catillaria nigroclavata (Nyl.) Schuler	CANI13	Catillariaceae
catillaria lichen	Catillaria subnegans (Nyl.) Boistel	CASU42	Catillariaceae
catillaria lichen	Catillaria subviridis (Nyl.) Zahlbr.	CASU43	Catillariaceae
catillaria lichen	Catillaria terrena (Willey) Zahlbr.	CATE23	Catillariaceae
catillaria lichen	Catillaria tristis (Mull. Arg.) Arnold	CATR23	Catillariaceae
catinaria lichen	Catinaria atropurpurea (Schaerer) Vezda & Poelt	CAAT22	Bacidiaceae
catinaria lichen	Catinaria subcorallina (Zahlbr.) Brako	CASU44	Bacidiaceae
catinaria lichen	Catinaria Vainio	CATIN	Bacidiaceae
catolechia lichen	Catolechia Flotow	CATOL	Rhizocarpaceae
cat's milk	Cymbocarpa refracta Miers	CYRE12	Burmanniaceae
cattail sedge	Carex typhina Michx.	CATY	Cyperaceae
cattle saltbush	Atriplex polycarpa (Torr.) S. Wats.	ATPO	Chenopodiaceae
cattleya	Cattleya Lindl.	CATTL2	Orchidaceae
Caucasian bluestem	Bothriochloa bladhii (Retz.) S.T. Blake	BOBL	Poaceae
Caucasian hackberry	Celtis caucasica Willd.	CECA18	Ulmaceae
caucho rubber	Castilla ulei Warb.	CAUL5	Moraceae
Caughuawaga hawthorn	Crataegus suborbiculata Sarg.	CRSU3	Rosaceae
caulerpa	Caulerpa J. V. F. Lamouroux	CAULE	Caulerpaceae
caulostramina	Caulostramina Rollins	CAULO2	Brassicaceae
cayenne pepper	Capsicum annuum L.	CAAN4	Solanaceae
cayenne pepper	Capsicum annuum L. var. annuum	CAANA4	Solanaceae
cayenne pepper	Capsicum annuum L. var. glabriusculum (Dunal) Heiser & Pickersgill	CAANG	Solanaceae
cayratia	Cayratia Juss.	CAYRA	Vitaceae
ceanothus	Ceanothus L.	CEANO	Rhamnaceae
cecidonia lichen	Cecidonia Treibel & Rambold	CECID	Lecideaceae
cecidonia lichen	Cecidonia umbonella (Nyl.) Triebel & Rambold	CEUM3	Lecideaceae
cedar	Cedrus Trew	CEDRU	Pinaceae
cedar	Chamaecyparis Spach	CHAMA4	Cupressaceae
Cedar Breaks milkvetch	Astragalus limnocharis Barneby	ASLI3	Fabaceae
Cedar Breaks milkvetch	Astragalus limnocharis Barneby var. limnocharis	ASLIL2	Fabaceae
Cedar Breaks springparsley	Cymopterus minimus (Mathias) Mathias	CYMI2	Apiaceae
cedar sedge	Carex planostachys Kunze	CAPL3	Cyperaceae
cedar wattle	Acacia elata A. Cunningham ex Benth.	ACEL	Fabaceae
cedar-of-Goa	Cupressus lusitanica Mill.	CULU2	Cupressaceae
Cedars mariposa lily	Calochortus raichei Farwig & Girard	CARA16	Liliaceae
cedrela	Cedrela P. Br.	CEDRE	Meliaceae
cedronella	Cedronella Moench	CEDRO	Lamiaceae
Cedros milkvetch	Astragalus insularis Kellogg	ASIN6	Fabaceae
ceiba	Ceiba P. Mill.	CEIBA	Bombacaceae
celandine	Chelidonium L.	CHELI	Papaveraceae
celandine	Chelidonium majus L.	CHMA2	Papaveraceae
celandine	Chelidonium majus L. var. laciniatum (P. Mill.) Syme	CHMAL	Papaveraceae
celandine	Chelidonium majus L. var. majus	CHMAM	Papaveraceae
celandine	Chelidonium majus L. var. plenum Wehrhahn	CHMAP	Papaveraceae
celeriac	Apium graveolens L. var. rapaceum (Miller) Gaudin	APGRR	Apiaceae
celery	Apium L.	APIUM	Apiaceae
celmisia	Celmisia Cass.	CELMI	Asteraceae
centaury	Centaurium Hill	CENTA2	Gentianaceae
centella	Centella L.	CENTE	Apiaceae
Centerville brazos-mint	Brazoria truncata (Benth.) Engelm. & Gray var. pulcherrima (Lundell) M.W. Turner	BRTRP	Lamiaceae
centipeda	Centipeda Lour.	CENTI	Asteraceae
centranthus	Centranthus Neck. ex Lam. & DC.	CENTR	Valerianaceae
centratherum	Centratherum Cass.	CENTR6	Asteraceae
centrostegia	Centrostegia Gray ex Benth.	CENTR4	Polygonaceae
century plant	Agave angustifolia Haw.	AGAN4	Agavaceae
century plant	Agave xylonacantha Salm-Dyck	AGXY	Agavaceae
cephaelis	Cephaelis Sw.	CEPHA9	Rubiaceae
cephalanthera	Cephalanthera L.C. Rich.	CEPHA3	Orchidaceae
cephalaria	Cephalaria Schrad. ex Roemer & J.A. Schultes	CEPHA4	Dipsacaceae
cephalocereus	Cephalocereus Pfeiff.	CEPHA10	Cactaceae
cephalophysis lichen	Cephalophysis (Hertel) Kilias	CEPHA7	Teloschistaceae
cephalophysis lichen	Cephalophysis leucospila (Anzi) R. Kilias & Scheid.	CELE5	Teloschistaceae
cephalotaxus	Cephalotaxus Siebold & Zucc. ex Endl.	CEPHA8	Cephalotaxaceae
ceratiola	Ceratiola Michx.	CERAT5	Empetraceae
ceratodon moss	Ceratodon Brid.	CERAT9	Ditrichaceae
ceratodon moss	Ceratodon purpureus (Hedw.) Brid.	CEPU12	Ditrichaceae
ceratodon moss	Ceratodon purpureus (Hedw.) Brid. var. purpureus	CEPUP4	Ditrichaceae
ceratodon moss	Ceratodon stenocarpus Bruch & Schimp. in B.S.G.	CEST5	Ditrichaceae
ceratonia	Ceratonia L.	CERAT4	Fabaceae
ceratostigma	Ceratostigma Bunge	CERAT7	Plumbaginaceae
ceratotheca	Ceratotheca Endl.	CERAT6	Pedaliaceae
cercidospora lichen	Cercidospora epipolytropa (Mudd) Arnold	CEEP	Uncertain Lichen Family
cercidospora lichen	Cercidospora Korber	CERCI4	Uncertain Lichen Family
ceropegia	Ceropegia Cass.	CEROP	Asclepiadaceae
ceroxylon palm	Ceroxylon Bonpl. ex DC.	CEROX	Arecaceae
cerro hawthorn	Crataegus erythropoda Ashe	CRER	Rosaceae
cetraria lichen	Cetraria Ach.	CETRA2	Parmeliaceae
cetraria lichen	Cetraria ericetorum Opiz	CEER6	Parmeliaceae
cetraria lichen	Cetraria ericetorum Opiz ssp. ericetorum	CEERE	Parmeliaceae
cetraria lichen	Cetraria laevigata Rass.	CELA60	Parmeliaceae
cetraria lichen	Cetraria nigricans Nyl.	CENI60	Parmeliaceae
cetraria lichen	Cetraria odontella (Ach.) Ach.	CEOD60	Parmeliaceae
Ceylon hound's tongue	Cynoglossum furcatum Wallich ex Roxb.	CYFU8	Boraginaceae
Ceylon spinach	Basella alba L.	BAAL2	Basellaceae
Ceylon swamplily	Crinum zeylanicum (L.) L.	CRZE	Liliaceae
Chaco milkvetch	Astragalus micromerius Barneby	ASMI5	Fabaceae
chaenothecopsis lichen	Chaenothecopsis brevipes Tibell	CHBR11	Mycocaliciaceae
chaenothecopsis lichen	Chaenothecopsis consociata (Nadv.) A. F. W. Schmidt	CHCO23	Mycocaliciaceae
chaenothecopsis lichen	Chaenothecopsis debilis (Turner & Borrer ex Sm.) Tibell	CHDE15	Mycocaliciaceae
chaenothecopsis lichen	Chaenothecopsis epithallina Tibell	CHEP	Mycocaliciaceae
chaenothecopsis lichen	Chaenothecopsis nana Tibell	CHNA5	Mycocaliciaceae
chaenothecopsis lichen	Chaenothecopsis pusilla (Ach.) A. F. W. Schmidt	CHPU7	Mycocaliciaceae
chaenothecopsis lichen	Chaenothecopsis pusiola (Ach.) Vainio	CHPU8	Mycocaliciaceae
chaenothecopsis lichen	Chaenothecopsis rubescens Vainio	CHRU6	Mycocaliciaceae
chaenothecopsis lichen	Chaenothecopsis savonica (Rasanen) Tibell	CHSA6	Mycocaliciaceae
chaenothecopsis lichen	Chaenothecopsis Vainio	CHAEN5	Mycocaliciaceae
chaenothecopsis lichen	Chaenothecopsis viridialba (Krempelh.) A. F. W. Schmidt	CHVI19	Mycocaliciaceae
chaenothecopsis lichen	Chaenothecopsis viridireagens (Nadv.) A. F. W. Schmidt	CHVI20	Mycocaliciaceae
chaff flower	Achyranthes L.	ACHYR2	Amaranthaceae
chaffbush	Amphipappus Torr. & Gray	AMPHI3	Asteraceae
chaffhead	Carphephorus Cass.	CARPH	Asteraceae
chaffweed	Anagallis minima (L.) Krause	ANMI4	Primulaceae
chaffy sedge	Carex paleacea Schreb. ex Wahlenb.	CAPA29	Cyperaceae
chalk maple	Acer leucoderme Small	ACLE	Aceraceae
chalky bluestem	Andropogon capillipes Nash	ANCA4	Poaceae
Challis milkvetch	Astragalus amblytropis Barneby	ASAM2	Fabaceae
chamaechaenactis	Chamaechaenactis Rydb.	CHAMA3	Asteraceae
chamaecrista	Chamaecrista mimosoides (L.) Greene	CHMI6	Fabaceae
chamaecytisus	Chamaecytisus Link	CHAMA20	Fabaceae
chamaedorea	Chamaedorea Willd.	CHAMA18	Arecaceae
chamaelirium	Chamaelirium Willd.	CHAMA6	Liliaceae
Chambers paintbrush	Castilleja chambersii M. Egger & R.J. Meinke	CACH40	Scrophulariaceae
chamelaucium	Chamelaucium Desf.	CHAME3	Myrtaceae
chamise	Adenostoma fasciculatum Hook. & Arn.	ADFA	Rosaceae
chamise	Adenostoma fasciculatum Hook. & Arn. var. fasciculatum	ADFAF	Rosaceae
chamise	Adenostoma fasciculatum Hook. & Arn. var. obtusifolium S. Wats.	ADFAO	Rosaceae
chamise	Adenostoma Hook. & Arn.	ADENO2	Rosaceae
Chamisso arnica	Arnica chamissonis Less.	ARCH3	Asteraceae
Chamisso arnica	Arnica chamissonis Less. ssp. chamissonis	ARCHC	Asteraceae
Chamisso arnica	Arnica chamissonis Less. ssp. chamissonis var. chamissonis	ARCHC2	Asteraceae
Chamisso arnica	Arnica chamissonis Less. ssp. chamissonis var. interior Maguire	ARCHI3	Asteraceae
Chamisso arnica	Arnica chamissonis Less. ssp. foliosa (Nutt.) Maguire	ARCHF	Asteraceae
Chamisso arnica	Arnica chamissonis Less. ssp. foliosa (Nutt.) Maguire var. andina (Nutt.) Ediger & T.M. Barkl.	ARCHA2	Asteraceae
Chamisso arnica	Arnica chamissonis Less. ssp. foliosa (Nutt.) Maguire var. bernardina (Greene) Maguire	ARCHB2	Asteraceae
Chamisso arnica	Arnica chamissonis Less. ssp. foliosa (Nutt.) Maguire var. incana (Gray) Hultén	ARCHI4	Asteraceae
Chamisso arnica	Arnica chamissonis Less. ssp. foliosa (Nutt.) Maguire var. maguirei (A. Nels.) Maguire	ARCHM2	Asteraceae
chamisso sedge	Carex pachystachya Cham. ex Steud.	CAPA14	Cyperaceae
chamissoa	Chamissoa Kunth	CHAMI	Amaranthaceae
Chamisso's manfern	Cibotium chamissoi Kaulfuss	CICH	Dicksoniaceae
chamomile	Anthemis L.	ANTHE	Asteraceae
Champlain beachgrass	Ammophila champlainensis Seymour	AMCH6	Poaceae
chaparral asphead	Aspicarpa hirtella L.C. Rich.	ASHI3	Malpighiaceae
chaparral bellflower	Campanula exigua Rattan	CAEX3	Campanulaceae
chaparral brodiaea	Brodiaea jolonensis Eastw.	BRJO	Liliaceae
chaparral clarkia	Clarkia affinis H.F. & M.E. Lewis	CLAF	Onagraceae
chaparral dodder	Cuscuta californica Hook. & Arn.	CUCA	Cuscutaceae
chaparral dodder	Cuscuta californica Hook. & Arn. var. apiculata Engelm.	CUCAA	Cuscutaceae
chaparral dodder	Cuscuta californica Hook. & Arn. var. breviflora Engelm.	CUCAB	Cuscutaceae
chaparral dodder	Cuscuta californica Hook. & Arn. var. californica	CUCAC	Cuscutaceae
chaparral dodder	Cuscuta californica Hook. & Arn. var. papillosa Yuncker	CUCAP	Cuscutaceae
chaparral false bindweed	Calystegia occidentalis (Gray) Brummitt	CAOC6	Convolvulaceae
chaparral false bindweed	Calystegia occidentalis (Gray) Brummitt ssp. fulcrata (Gray) Brummitt	CAOCF	Convolvulaceae
chaparral false bindweed	Calystegia occidentalis (Gray) Brummitt ssp. occidentalis	CAOCO	Convolvulaceae
chaparral false bindweed	Calystegia occidentalis (Gray) Brummitt ssp. occidentalis var. occidentalis	CAOCO2	Convolvulaceae
chaparral false bindweed	Calystegia occidentalis (Gray) Brummitt ssp. occidentalis var. tomentella (Greene) Brummitt	CAOCT2	Convolvulaceae
chaparral whitethorn	Ceanothus leucodermis Greene	CELE2	Rhamnaceae
Chaplin's golden columbine	Aquilegia chrysantha Gray var. chaplinei (Standl. ex Payson) Lott	AQCHC	Ranunculaceae
chapmannia	Chapmannia Torr. & Gray	CHAPM	Fabaceae
Chapman's sedge	Carex chapmanii Steud.	CACH9	Cyperaceae
chard	Beta vulgaris L. ssp. cicla (L.) Koch	BEVUC	Chenopodiaceae
Charleston Mountain angelica	Angelica scabrida Clokey & Mathias ex Clokey	ANSC9	Apiaceae
Charleston Mountain pussytoes	Antennaria soliceps Blake	ANSO2	Asteraceae
Charleston Mountain silverbush	Argythamnia cyanophylla (Woot. & Standl.) Ingram	ARCY	Euphorbiaceae
Charleston sandwort	Arenaria congesta Nutt. var. charlestonensis Maguire	ARCOC2	Caryophyllaceae
charming centaury	Centaurium venustum (Gray) B.L. Robins.	CEVE3	Gentianaceae
charming centaury	Centaurium venustum (Gray) B.L. Robins. ssp. abramsii Munz	CEVEA	Gentianaceae
charming centaury	Centaurium venustum (Gray) B.L. Robins. ssp. venustum	CEVEV	Gentianaceae
Chase's threeawn	Aristida chaseae A.S. Hitchc.	ARCH4	Poaceae
Chattahoochee false foxglove	Agalinis plukenetii (Ell.) Raf.	AGPL	Scrophulariaceae
chautle livingrock	Ariocarpus fissuratus (Engelm.) K. Schum.	ARFI	Cactaceae
chaya	Cnidoscolus chayamansa McVaugh	CNCH	Euphorbiaceae
cheatgrass	Bromus tectorum L.	BRTE	Poaceae
checkered jointtail grass	Coelorachis tessellata (Steud.) Nash	COTE5	Poaceae
chee reedgrass	Calamagrostis epigeios (L.) Roth	CAEP	Poaceae
chee reedgrass	Calamagrostis epigeios (L.) Roth var. epigeios	CAEPE	Poaceae
chee reedgrass	Calamagrostis epigeios (L.) Roth var. georgica (K. Koch) Ledeb.	CAEPG2	Poaceae
Cheesman's swallow-wort	Cynanchum cheesmanii Woods.	CYCH	Asclepiadaceae
cheiridopsis	Cheiridopsis N.E. Br.	CHEIR3	Aizoaceae
cheirodendron	Cheirodendron Nutt. ex Seem.	CHEIR	Araliaceae
cheiroglossa fern	Cheiroglossa K. Presl	CHEIR2	Ophioglossaceae
chempedak	Artocarpus integer (Thunb.) Merr.	ARIN17	Moraceae
chenopod brickellbush	Brickellia chenopodina (Greene) B.L. Robins.	BRCH	Asteraceae
cherimoya	Annona cherimola P. Mill.	ANCH9	Annonaceae
Cherokee sedge	Carex cherokeensis Schwein.	CACH3	Cyperaceae
chervil	Anthriscus Pers.	ANTHR	Apiaceae
chervil	Chaerophyllum L.	CHAER	Apiaceae
chestnut	Castanea P. Mill.	CASTA	Fagaceae
chestnut milkvetch	Astragalus castaneiformis S. Wats.	ASCA15	Fabaceae
chestnut scale spleenwort	Asplenium cirrhatum L.C. Rich. ex Willd.	ASCI6	Aspleniaceae
chestnut sedge	Carex castanea Wahlenb.	CACA16	Cyperaceae
chestnutleaf false croton	Caperonia castaneifolia (L.) St.-Hil.	CACA41	Euphorbiaceae
Chicita's giant shield lichen	Cetrelia chicitae (Culb.) Culb. & C. Culb.	CECH2	Parmeliaceae
chick pea	Cicer arietinum L.	CIAR5	Fabaceae
chicory	Cichorium intybus L.	CIIN	Asteraceae
chicory	Cichorium L.	CICHO	Asteraceae
Chihuahua scaly cloakfern	Astrolepis cochisensis (Goodding) Benham & Windham ssp. chihuahuaensis Benham	ASCOC2	Pteridaceae
Chihuahuan balloonvine	Cardiospermum dissectum (S. Wats.) Radlk.	CADI15	Sapindaceae
Chihuahuan brickellbush	Brickellia floribunda Gray	BRFL	Asteraceae
Chihuahuan chickweed	Cerastium sordidum B.L. Robins.	CESO4	Caryophyllaceae
Chihuahuan sedge	Carex chihuahuensis Mackenzie	CACH4	Cyperaceae
Child's blue eyed Mary	Collinsia childii Parry ex Gray	COCH	Scrophulariaceae
Chilean cedar	Austrocedrus chilensis (D. Don) Pic. Serm. & Bizzarri	AUCH	Cupressaceae
Chilean cedar	Austrocedrus Florin & Boutelje	AUSTR2	Cupressaceae
Chilean chess	Bromus berteroanus Colla	BRBE6	Poaceae
Chilean hard fern	Blechnum chordatum (Desv.) Hieron.	BLCH3	Blechnaceae
Chilean jessamine	Cestrum parqui L'Hér.	CEPA9	Solanaceae
Chilean ricegrass	Achnatherum caudatum (Trin.) S.L.W. Jacobs & J. Everett	ACCA31	Poaceae
China aster	Callistephus chinensis (L.) Nees	CACH25	Asteraceae
chinalaurel	Antidesma L.	ANTID	Euphorbiaceae
China-shrub	Ardisia solanacea Roxb.	ARSO	Myrsinaceae
Chinchilla wattle	Acacia chinchellensis Tindale	ACCH7	Fabaceae
Chinese albizia	Albizia chinensis (Osbeck) Merr.	ALCH2	Fabaceae
Chinese angelica tree	Aralia chinensis L.	ARCH12	Araliaceae
Chinese black olive	Canarium pimela Konig	CAPI16	Burseraceae
Chinese Camp brodiaea	Brodiaea pallida Hoover	BRPA2	Liliaceae
Chinese catalpa	Catalpa ovata G. Don	CAOV5	Bignoniaceae
Chinese chestnut	Castanea mollissima Blume	CAMO83	Fagaceae
Chinese chives	Allium odorum L.	ALOD2	Liliaceae
Chinese chives	Allium tuberosum Rottl. ex Spreng.	ALTU3	Liliaceae
Chinese fir	Cunninghamia lanceolata (Lamb.) Hook.	CULA	Cupressaceae
Chinese grass	Boehmeria nivea (L.) Gaud.	BONI2	Urticaceae
Chinese hackberry	Celtis sinensis Pers.	CESI8	Ulmaceae
Chinese haw	Crataegus pinnatifida Bunge	CRPI2	Rosaceae
Chinese haw	Crataegus pinnatifida Bunge var. major N. E. Br.	CRPIM2	Rosaceae
Chinese hawthorn	Crataegus cuneata Siebold & Zucc.	CRCU6	Rosaceae
Chinese hazelnut	Corylus colurna L. var. chinensis (Franchet) Burkill	COCOC6	Betulaceae
Chinese hemlockparsley	Conioselinum chinense (L.) B.S.P.	COCH2	Apiaceae
Chinese hound's tongue	Cynoglossum amabile Stapf & Drummond	CYAM3	Boraginaceae
Chinese houses	Collinsia concolor Greene	COCO	Scrophulariaceae
Chinese kale	Brassica alboglabra L. H. Bailey	BRAL8	Brassicaceae
Chinese milkvetch	Astragalus chinensis L. f.	ASCH6	Fabaceae
Chinese milk-vetch	Astragalus sinicus L.	ASSI13	Fabaceae
chinese taro	Alocasia cucullata (Lour.) G. Don	ALCU5	Araceae
Chinese violet	Asystasia gangetica (L.) T. Anders.	ASGA2	Acanthaceae
Chinese white olive	Canarium album (Lour.) Rausch.	CAAL31	Burseraceae
Chinese yarrow	Achillea alpina L.	ACAL17	Asteraceae
Chinese-plumbago	Ceratostigma willmottianum Stapf	CEWI2	Plumbaginaceae
chinkapin	Castanea pumila (L.) P. Mill.	CAPU9	Fagaceae
chinkapin	Castanea pumila (L.) P. Mill. var. pumila	CAPUP3	Fagaceae
Chinle saltbush	Atriplex asterocarpa Stutz, Chu & Sanderson	ATAS2	Chenopodiaceae
Chino grama	Bouteloua ramosa Scribn. ex Vasey	BORA4	Poaceae
Chinook brome	Bromus laevipes Shear	BRLA3	Poaceae
chinquapin	Chrysolepis Hjelmquist	CHRYS15	Fagaceae
chiodecton lichen	Chiodecton Ach.	CHIOD	Opegraphaceae
chiodecton lichen	Chiodecton sphaerale Ach.	CHSP8	Opegraphaceae
chiodecton lichen	Chiodecton subochroleucum Fink	CHSU15	Opegraphaceae
chione	Chione DC.	CHION3	Rubiaceae
chionodoxa	Chionodoxa Boiss.	CHION4	Liliaceae
chipilín	Crotalaria cajanifolia Kunth	CRCA28	Fabaceae
chiranthodendron	Chiranthodendron Cerv. ex Cav.	CHIRA	Sterculiaceae
chirauli nut	Buchanania latifolia Roxb.	BULA8	Anacardiaceae
Chiricahua Mountain columbine	Aquilegia triternata Payson	AQTR	Ranunculaceae
Chiricahua Mountain sandmat	Chamaesyce florida (Engelm.) Millsp.	CHFL3	Euphorbiaceae
Chiricahua Mountain stinkweed	Cleomella longipes Torr.	CLLO	Capparaceae
Chisos Mountain century plant	Agave glomeruliflora (Engelm.) Berger	AGGL2	Agavaceae
Chisos Mountain false Indianmallow	Allowissadula holosericea (Scheele) Bates	ALHO4	Malvaceae
Chisos Mountain pricklypoppy	Argemone chisosensis G.B. Ownbey	ARCH2	Papaveraceae
Chisos prairie acacia	Acacia angustissima (P. Mill.) Kuntze var. chisosiana Isely	ACANC	Fabaceae
chloracantha	Chloracantha Nesom	CHLOR6	Asteraceae
chlorocrambe	Chlorocrambe Rydb.	CHLOR2	Brassicaceae
chlorophytum	Chlorophytum Ker-Gawl.	CHLOR5	Liliaceae
chocolate vine	Akebia Dcne.	AKEBI	Lardizabalaceae
chocolate vine	Akebia quinata (Houtt.) Dcne.	AKQU	Lardizabalaceae
chondrilla	Chondrilla L.	CHOND	Asteraceae
chondrodendron	Chondrodendron Ruiz & Pavón	CHOND2	Menispermaceae
chorispora	Chorispora R. Br. ex DC.	CHORI	Brassicaceae
Chorro Creek Bog thistle	Cirsium fontinale (Greene) Jepson var. obispoense J.T. Howell	CIFOO	Asteraceae
Christmas cactus	Cylindropuntia leptocaulis (DC.) F.M. Knuth	CYLE8	Cactaceae
Christmasberry	Crossopetalum ilicifolium (Poir.) Kuntze	CRIL2	Celastraceae
Christmastree	Abies veitchii Lindl.	ABVE2	Pinaceae
Christ's Indian paintbrush	Castilleja christii N. Holmgren	CACH19	Scrophulariaceae
chromatochlamys lichen	Chromatochlamys muscorum (Fr.) H. Mayrh. & Poelt	CHMU6	Thelenellaceae
chromatochlamys lichen	Chromatochlamys muscorum (Fr.) H. Mayrh. & Poelt var. muscorum	CHMUM4	Thelenellaceae
chromatochlamys lichen	Chromatochlamys muscorum (Fr.) H. Mayrh. & Poelt var. octospora (Nyl.) H. Mayrh. & Poelt	CHMUO	Thelenellaceae
chromatochlamys lichen	Chromatochlamys Trevisan	CHROM2	Thelenellaceae
chrozophora	Chrozophora A. Juss.	CHROZ	Euphorbiaceae
chrysactinia	Chrysactinia Gray	CHRYS	Asteraceae
chrysobalanus	Chrysobalanus L.	CHRYS3	Chrysobalanaceae
chrysogonum	Chrysogonum L.	CHRYS4	Asteraceae
chryso-hypnum moss	Chryso-hypnum Hampe	CHRYS14	Hypnaceae
chrysoma	Chrysoma Nutt.	CHRYS11	Asteraceae
chrysophyllum	Chrysophyllum L.	CHRYS5	Sapotaceae
chrysothemis	Chrysothemis Dcne.	CHRYS16	Gesneriaceae
churchmouse threeawn	Aristida dichotoma Michx.	ARDI4	Poaceae
churchmouse threeawn	Aristida dichotoma Michx. var. dichotoma	ARDID	Poaceae
churchsteeples	Agrimonia eupatoria L.	AGEU	Rosaceae
chusquea bamboo	Chusquea Kunth	CHUSQ	Poaceae
cibola milkvetch	Astragalus albulus Woot. & Standl.	ASAL5	Fabaceae
cicada milkvetch	Astragalus chamaeleuce Gray	ASCH4	Fabaceae
cicada milkvetch	Astragalus chamaeleuce Gray var. chamaeleuce	ASCHC2	Fabaceae
cicada milkvetch	Astragalus chamaeleuce Gray var. laccoliticus (M.E. Jones) Barneby ex Isely	ASCHL2	Fabaceae
cicendia	Cicendia Adans.	CICEN	Gentianaceae
cicer	Cicer L.	CICER	Fabaceae
cicer milkvetch	Astragalus cicer L.	ASCI4	Fabaceae
cigar flower	Cuphea ignea A. DC.	CUIG	Lythraceae
ciliate reindeer lichen	Cladina ciliata (Stirton) Trass	CLCI60	Cladoniaceae
ciliate reindeer lichen	Cladina ciliata (Stirton) Trass var. ciliata	CLCIC	Cladoniaceae
cima milkvetch	Astragalus cimae M.E. Jones	ASCI3	Fabaceae
cima milkvetch	Astragalus cimae M.E. Jones var. cimae	ASCIC3	Fabaceae
cima milkvetch	Astragalus cimae M.E. Jones var. sufflatus Barneby	ASCIS	Fabaceae
cinchona	Cinchona L.	CINCH	Rubiaceae
cinchona shell lichen	Arthopyrenia cinchonae (Ach.) Mull. Arg.	ARCI5	Arthopyreniaceae
cinclidium moss	Cinclidium stygium Sw. in Schrad.	CIST70	Mniaceae
cinclidium moss	Cinclidium subrotundum Lindb.	CISU70	Mniaceae
cinclidium moss	Cinclidium Sw. in Schrad.	CINCL2	Mniaceae
cineraria	Cineraria L.	CINER	Asteraceae
cinnabar orange lichen	Caloplaca cinnabarina (Ach.) Zahlbr.	CACI9	Teloschistaceae
cinnamon	Cinnamomum Schaeffer	CINNA2	Lauraceae
cinnamon	Cinnamomum sessilifolium Kanehira	CISE2	Lauraceae
cinnamon	Cinnamomum verum J. Presl	CIVE2	Lauraceae
cinnamon astrothelium lichen	Astrothelium cinnamomeum (Eschw.) Mull. Arg.	ASCI11	Trypetheliaceae
cinnecord	Acacia choriophylla Benth.	ACCH	Fabaceae
circumpolar reedgrass	Calamagrostis deschampsioides Trin.	CADE3	Poaceae
circumpolar sedge	Carex adelostoma Krecz.	CAAD	Cyperaceae
circumspect dotted lichen	Bacidia circumspecta (Nyl. ex Vainio) Malme	BACI3	Bacidiaceae
cirriphyllum moss	Cirriphyllum cirrosum (Schwaegr. in Schultes) Grout	CICI70	Brachytheciaceae
cirriphyllum moss	Cirriphyllum Grout	CIRRI2	Brachytheciaceae
cirriphyllum moss	Cirriphyllum piliferum (Hedw.) Grout	CIPI70	Brachytheciaceae
Cisco milkvetch	Astragalus sabulosus M.E. Jones	ASSA3	Fabaceae
Cisco milkvetch	Astragalus sabulosus M.E. Jones var. sabulosus	ASSAS	Fabaceae
cissampelos	Cissampelos L.	CISSA	Menispermaceae
cissus	Cissus repens Lam.	CIRE5	Vitaceae
citrange	×Citroncirus webberi J. Ingram & H. Moore	CIWE	Rutaceae
citron	Citrus medica L.	CIME3	Rutaceae
citroncirus	×Citroncirus J. Ingram & H. Moore	CITRO2	Rutaceae
citronella grass	Cymbopogon nardus (L.) Rendle	CYNA	Poaceae
citrus	Citrus L.	CITRU2	Rutaceae
city goosefoot	Chenopodium urbicum L.	CHUR	Chenopodiaceae
cladidium lichen	Cladidium Hafellner	CLADI2	Lecanoraceae
clammy cherry	Cordia obliqua Willd.	COOB3	Boraginaceae
clammy false oxtongue	Blumea viscosa (P. Mill.) Badillo	BLVI	Asteraceae
clammy goosefoot	Chenopodium pumilio R. Br.	CHPU	Chenopodiaceae
claopodium moss	Claopodium (Lesq. & James) Ren. & Card.	CLAOP	Leskeaceae
claopodium moss	Claopodium crispifolium (Hook.) Ren. & Card.	CLCR4	Leskeaceae
claopodium moss	Claopodium pellucinerve (Mitt.) Best	CLPE8	Leskeaceae
claoxylon	Claoxylon A. Juss.	CLAOX	Euphorbiaceae
clapdaisy	Clappia Gray	CLAPP	Asteraceae
clappertonia	Clappertonia Meissner	CLAPP2	Tiliaceae
clappertonia	Clappertonia polyandra (Schumann) Bech.	CLPO8	Tiliaceae
clarkia	Clarkia Pursh	CLARK	Onagraceae
Clarkton hawthorn	Crataegus helvina Ashe	CRHE3	Rosaceae
clasmatodon moss	Clasmatodon Hook. & Wils. in Wils.	CLASM	Fabroniaceae
clasmatodon moss	Clasmatodon parvulus (Hampe) Hook. & Wils. ex Sull. in Gray	CLPA17	Fabroniaceae
claspbract sedge	Carex amplectens Mackenzie	CAAM9	Cyperaceae
clasping arnica	Arnica amplexicaulis Nutt.	ARAM2	Asteraceae
clasping milkweed	Asclepias amplexicaulis Sm.	ASAM	Asclepiadaceae
claspingleaf doll's daisy	Boltonia decurrens (Torr. & Gray) Wood	BODE2	Asteraceae
claspingleaf wild cabbage	Caulanthus amplexicaulis S. Wats.	CAAM11	Brassicaceae
claspingleaf wild cabbage	Caulanthus amplexicaulis S. Wats. var. amplexicaulis	CAAMA	Brassicaceae
claspingleaf wild cabbage	Caulanthus amplexicaulis S. Wats. var. barbarae (J.T. Howell) Munz	CAAMB	Brassicaceae
clathroporina lichen	Clathroporina Mull. Arg.	CLATH	Trichotheliaceae
clausena	Clausena Burman f.	CLAUS	Rutaceae
clauzadea lichen	Clauzadea Hafellner & Bellem.	CLAUZ	Porpidiaceae
clauzadeana	Clauzadeana macula (Taylor) Coppins & Rambold	CLMA19	Lecanoraceae
clauzadeana	Clauzadeana Roux	CLAUZ2	Lecanoraceae
clavate bentgrass	Agrostis clavata Trin.	AGCL	Poaceae
clay mariposa lily	Calochortus argillosus (Hoover) R. Zebell & P. Fiedler	CAAR44	Liliaceae
clay sand verbena	Abronia argillosa Welsh & Goodrich	ABAR	Nyctaginaceae
Clearwater cryptantha	Cryptantha intermedia (Gray) Greene	CRIN8	Boraginaceae
cleft sedge	Carex fissuricola Mackenzie	CAFI2	Cyperaceae
cleistocactus	Cleistocactus Lem.	CLEIS3	Cactaceae
Clementine suncup	Camissonia guadalupensis (S. Wats.) Raven ssp. clementina (Raven) Raven	CAGUC	Onagraceae
clermontia	Clermontia Gaud.	CLERM	Campanulaceae
Cleveland's cryptantha	Cryptantha clevelandii Greene	CRCL	Boraginaceae
Cleveland's cryptantha	Cryptantha clevelandii Greene var. clevelandii	CRCLC	Boraginaceae
Cleveland's cryptantha	Cryptantha clevelandii Greene var. dissita (I.M. Johnston) Jepson & Hoover	CRCLD	Boraginaceae
Cleveland's cryptantha	Cryptantha clevelandii Greene var. florosa I.M. Johnston	CRCLF	Boraginaceae
Cleveland's lipfern	Cheilanthes clevelandii D.C. Eat.	CHCL	Pteridaceae
Cleveland's milkvetch	Astragalus clevelandii Greene	ASCL2	Fabaceae
Cleveland's spineflower	Chorizanthe clevelandii Parry	CHCL2	Polygonaceae
cleyera	Cleyera Thunb.	CLEYE	Theaceae
clibadium	Clibadium L.	CLIBA	Asteraceae
clidemia	Clidemia D. Don	CLIDE	Melastomataceae
cliff bittercress	Cardamine rupicola (O.E. Schulz) C.L. Hitchc.	CARU2	Brassicaceae
cliff bottlebrush	Callistemon comboynensis Cheel	CACO74	Myrtaceae
cliff Indian paintbrush	Castilleja rupicola Piper ex Fern.	CARU9	Scrophulariaceae
Cliff Palace milkvetch	Astragalus deterior (Barneby) Barneby	ASDE4	Fabaceae
cliff thistle	Cirsium turneri Warnock	CITU	Asteraceae
cliffdweller	Caulostramina jaegeri (Rollins) Rollins	CAJA5	Brassicaceae
cliffdweller's cryptantha	Cryptantha elata (Eastw.) Payson	CREL4	Boraginaceae
cliffs flatsedge	Cyperus sandwicensis Kükenth.	CYSA	Cyperaceae
cliftonia	Cliftonia Banks ex Gaertn. f.	CLIFT	Cyrillaceae
climacium moss	Climacium Web. & Mohr ex Mohr	CLIMA2	Climaciaceae
climbing alsinidendron	Alsinidendron viscosum (Mann) Sherff	ALVI6	Caryophyllaceae
climbing aster	Ampelaster carolinianus (Walt.) Nesom	AMCA14	Asteraceae
climbing aster	Ampelaster Nesom	AMPEL4	Asteraceae
climbing bamboo	Arthrostylidium Rupr.	ARTHR2	Poaceae
climbing bamboo	Chusquea abietifolia Griseb.	CHAB	Poaceae
climbing dayflower	Commelina diffusa Burm. f.	CODI5	Commelinaceae
climbing dayflower	Commelina diffusa Burm. f. var. diffusa	CODID3	Commelinaceae
climbing dayflower	Commelina diffusa Burm. f. var. gigas (Small) Faden	CODIG	Commelinaceae
climbing ilang-ilang	Artabotrys hexapetalus (L. f.) Bhandari	ARHE11	Annonaceae
climbing wartclub	Boerhavia scandens L.	BOSC	Nyctaginaceae
clinopodium	Clinopodium L.	CLINO	Lamiaceae
cliostomum lichen	Cliostomum Fr.	CLIOS	Bacidiaceae
clitoria	Barbieria pinnata (Pers.) Baill.	BAPI3	Fabaceae
cloakfern	Astrolepis Benham & Windham	ASTRO	Pteridaceae
Clokey's cryptantha	Cryptantha clokeyi I.M. Johnston	CRCL2	Boraginaceae
Clokey's milkvetch	Astragalus aequalis Clokey	ASAE	Fabaceae
Clokey's onion	Allium howellii Eastw. var. clokeyi Ownbey & Aase	ALHOC	Liliaceae
closedhead sedge	Carex norvegica Retz. ssp. inferalpina (Wahlenb.) Hultén	CANOI	Cyperaceae
cloth of gold	Crocus angustifolius Weston	CRAN5	Iridaceae
cloud sedge	Carex haydeniana Olney	CAHA6	Cyperaceae
cloudcroft thistle	Cirsium inornatum Woot. & Standl.	CIIN5	Asteraceae
clover dodder	Cuscuta epithymum (L.) L.	CUEP	Cuscutaceae
clubawn grass	Corynephorus Beauv.	CORYN	Poaceae
clubed begonia	Begonia cucullata Willd.	BECU	Begoniaceae
clubhair mariposa lily	Calochortus clavatus S. Wats.	CACL	Liliaceae
clubhair mariposa lily	Calochortus clavatus S. Wats. var. avius Jepson	CACLA	Liliaceae
clubhair mariposa lily	Calochortus clavatus S. Wats. var. clavatus	CACLC2	Liliaceae
clubhair mariposa lily	Calochortus clavatus S. Wats. var. pallidus (Hoover) R. Fiedler & P. Zebell	CACLP4	Liliaceae
clubmoss mountain heather	Cassiope lycopodioides (Pallas) D. Don	CALY4	Ericaceae
clubmoss mountain heather	Cassiope lycopodioides (Pallas) D. Don var. cristapilosa (Calder & Taylor) Boivin	CALYC6	Ericaceae
clubmoss mountain heather	Cassiope lycopodioides (Pallas) D. Don var. lycopodioides	CALYL2	Ericaceae
clustered dodder	Cuscuta fasciculata Yuncker	CUFA	Cuscutaceae
clustered field sedge	Carex praegracilis W. Boott	CAPR5	Cyperaceae
clustered flatsedge	Cyperus congestus Vahl	CYCO3	Cyperaceae
clustered hawthorn	Crataegus compacta Sarg.	CRCO26	Rosaceae
clustered lady's slipper	Cypripedium fasciculatum Kellogg ex S. Wats.	CYFA	Orchidaceae
clustered poppymallow	Callirhoe triangulata (Leavenworth) Gray	CATR	Malvaceae
clustered sedge	Carex cumulata (Bailey) Fern.	CACU3	Cyperaceae
clustered thistle	Cirsium brevistylum Cronq.	CIBR2	Asteraceae
clusterspike false indigo	Amorpha herbacea Walt.	AMHE	Fabaceae
clusterspike false indigo	Amorpha herbacea Walt. var. crenulata (Rydb.) Isely	AMHEC	Fabaceae
clusterspike false indigo	Amorpha herbacea Walt. var. herbacea	AMHEH	Fabaceae
clypeococcum lichen	Clypeococcum D. Hawksw.	CLYPE	Dacampiaceae
clypeococcum lichen	Clypeococcum grossum (Korber) D. Hawksw.	CLGR10	Dacampiaceae
clypeococcum lichen	Clypeococcum hypocenomycis D. Hawksw.	CLHY2	Dacampiaceae
cnemidaria	Cnemidaria K. Presl	CNEMI	Cyatheaceae
cneoridium	Cneoridium Hook. f.	CNEOR	Rutaceae
cnicus	Cnicus L.	CNICU	Asteraceae
cnidoscolus	Cnidoscolus Pohl	CNIDO	Euphorbiaceae
cnidoscolus	Cnidoscolus urens (L.) Arthur	CNUR	Euphorbiaceae
Coachella milkvetch	Astragalus lentiginosus Dougl. ex Hook. var. coachellae Barneby ex Shreve & Wiggins	ASLEC2	Fabaceae
coast agropogon	×Agropogon littoralis (Sm.) C.E. Hubbard [Agrostis stolonifera × Polypogon monospeliensis]	AGLI	Poaceae
coast banksia	Banksia integrifolia L. f.	BAIN10	Proteaceae
coast Indian paintbrush	Castilleja affinis Hook. & Arn.	CAAF	Scrophulariaceae
coast Indian paintbrush	Castilleja affinis Hook. & Arn. ssp. affinis	CAAFA2	Scrophulariaceae
coast Indian paintbrush	Castilleja affinis Hook. & Arn. ssp. litoralis (Pennell) Chuang & Heckard	CAAFL2	Scrophulariaceae
coast range brome	Bromus pseudolaevipes Wagnon	BRPS	Poaceae
coast range cryptantha	Cryptantha corollata (I.M. Johnston) I.M. Johnston	CRCO33	Boraginaceae
coast range false bindweed	Calystegia collina (Greene) Brummitt	CACO35	Convolvulaceae
coast range false bindweed	Calystegia collina (Greene) Brummitt ssp. collina	CACOC2	Convolvulaceae
coast range false bindweed	Calystegia collina (Greene) Brummitt ssp. oxyphylla Brummitt	CACOO	Convolvulaceae
coast range false bindweed	Calystegia collina (Greene) Brummitt ssp. tridactylosa (Eastw.) Brummitt	CACOT	Convolvulaceae
coast range false bindweed	Calystegia collina (Greene) Brummitt ssp. venusta Brummitt	CACOV	Convolvulaceae
coast range mariposa lily	Calochortus vestae Purdy	CAVE4	Liliaceae
coast whitethorn	Ceanothus incanus Torr. & Gray	CEIN	Rhamnaceae
coast yarrow	Achillea millefolium L. var. litoralis Ehrend. ex Nobs	ACMIL2	Asteraceae
coastal agave	Agave shawii Engelm.	AGSH	Agavaceae
coastal beach sandmat	Chamaesyce mesembrianthemifolia (Jacq.) Dugand	CHME7	Euphorbiaceae
coastal bluff beggarticks	Bidens forbesii Sherff	BIFO	Asteraceae
coastal bluff beggarticks	Bidens forbesii Sherff ssp. forbesii	BIFOF	Asteraceae
coastal bluff bentgrass	Agrostis clivicola Crampton	AGCL2	Poaceae
coastal bluff bentgrass	Agrostis clivicola Crampton var. clivicola	AGCLC	Poaceae
coastal brookfoam	Boykinia occidentalis Torr. & Gray	BOOC2	Saxifragaceae
coastal cholla	Cylindropuntia prolifera (Engelm.) F.M. Knuth	CYPR19	Cactaceae
coastal cryptantha	Cryptantha leiocarpa (Fisch. & C.A. Mey.) Greene	CRLE4	Boraginaceae
coastal dune sandmat	Chamaesyce cumulicola Small	CHCU4	Euphorbiaceae
coastal dunes milkvetch	Astragalus tener Gray var. titi (Eastw.) Barneby	ASTET	Fabaceae
coastal dwarf mistletoe	Arceuthobium littorum Hawksworth, Wiens & Nickrent	ARLI12	Viscaceae
coastal flatsedge	Cyperus pennatiformis Kükenth.	CYPE3	Cyperaceae
coastal flatsedge	Cyperus pennatiformis Kükenth. var. pennatiformis	CYPEP	Cyperaceae
coastal Indian mallow	Abutilon permolle (Willd.) Sweet	ABPE	Malvaceae
coastal lipfern	Cheilanthes intertexta (Maxon) Maxon	CHIN	Pteridaceae
coastal onion	Allium dichlamydeum Greene	ALDI2	Liliaceae
coastal plain angelica	Angelica dentata (Chapman) Coult. & Rose	ANDE4	Apiaceae
coastal plain buckbrush	Ceanothus serpyllifolius Nutt.	CESE5	Rhamnaceae
coastal plain chaffhead	Carphephorus corymbosus (Nutt.) Torr. & Gray	CACO37	Asteraceae
coastal plain false foxglove	Agalinis harperi Pennell	AGHA3	Scrophulariaceae
coastal plain flatsedge	Cyperus cuspidatus Kunth	CYCU	Cyperaceae
coastal plain goldenaster	Chrysopsis scabrella Torr. & Gray	CHSC2	Asteraceae
coastal plain honeycombhead	Balduina angustifolia (Pursh) B.L. Robins.	BAAN3	Asteraceae
coastal plain sedge	Carex crebriflora Wieg.	CACR5	Cyperaceae
coastal plain tickseed	Coreopsis gladiata Walt.	COGL2	Asteraceae
coastal ragweed	Ambrosia hispida Pursh	AMHI3	Asteraceae
coastal red Indian paintbrush	Castilleja hyetophila Pennell	CAHY5	Scrophulariaceae
coastal sagebrush	Artemisia californica Less.	ARCA11	Asteraceae
coastal sand sedge	Carex incurviformis Mackenzie	CAIN8	Cyperaceae
coastal sand sedge	Carex incurviformis Mackenzie var. danaensis (Stacey) F.J. Herm.	CAIND	Cyperaceae
coastal sand sedge	Carex incurviformis Mackenzie var. incurviformis	CAINI2	Cyperaceae
coastal sand verbena	Abronia latifolia Eschsch.	ABLA2	Nyctaginaceae
coastal sandbur	Cenchrus spinifex Cav.	CESP4	Poaceae
coastal sandmat	Chamaesyce skottsbergii (Sherff) Croizat & Deg.	CHSK	Euphorbiaceae
coastal sandmat	Chamaesyce skottsbergii (Sherff) Croizat & Deg. var. skottsbergii	CHSKS	Euphorbiaceae
coastal sandmat	Chamaesyce skottsbergii (Sherff) Croizat & Deg. var. vaccinioides (Sherff) Koutnik	CHSKV	Euphorbiaceae
coastal searocket	Cakile lanceolata (Willd.) O.E. Schulz	CALA2	Brassicaceae
coastal searocket	Cakile lanceolata (Willd.) O.E. Schulz ssp. fusiformis (Greene) Rodman	CALAF	Brassicaceae
coastal searocket	Cakile lanceolata (Willd.) O.E. Schulz ssp. lanceolata	CALAL2	Brassicaceae
coastal searocket	Cakile lanceolata (Willd.) O.E. Schulz ssp. pseudoconstricta Rodman	CALAP	Brassicaceae
coastal sedge	Carex exilis Dewey	CAEX7	Cyperaceae
coastal serviceberry	Amelanchier obovalis (Michx.) Ashe	AMOB2	Rosaceae
coastal sweetpepperbush	Clethra alnifolia L.	CLAL3	Clethraceae
coastal wormwood	Artemisia suksdorfii Piper	ARSU4	Asteraceae
coastalcreeper	Aphanisma Nutt. ex Moq.	APHAN2	Chenopodiaceae
cobblestone milkvetch	Astragalus nudisiliquus A. Nels.	ASNU2	Fabaceae
cobralily	Arisaema speciosum (Wallich) C. Martius	ARSP13	Araceae
cobwebby Indian paintbrush	Castilleja arachnoidea Greenm.	CAAR11	Scrophulariaceae
cobwebby thistle	Cirsium occidentale (Nutt.) Jepson	CIOC	Asteraceae
cobwebby thistle	Cirsium occidentale (Nutt.) Jepson var. californicum (Gray) Keil & C. Turner	CIOCC4	Asteraceae
cobwebby thistle	Cirsium occidentale (Nutt.) Jepson var. occidentale	CIOCO	Asteraceae
cobwebby thistle	Cirsium occidentale (Nutt.) Jepson var. venustum (Greene) Jepson	CIOCV	Asteraceae
cobwebby wild indigo	Baptisia arachnifera Duncan	BAAR	Fabaceae
coccinia	Coccinia Wight & Arn.	COCCI	Cucurbitaceae
coccocarpia lichen	Coccocarpia erythroxyli (Sprengel) Swinscow & Krog	COER8	Coccocarpiaceae
coccocarpia lichen	Coccocarpia palmicola (Sprengel) Arv. & D. J. Galloway	COPA29	Coccocarpiaceae
coccocarpia lichen	Coccocarpia Pers.	COCCO4	Coccocarpiaceae
coccocypselum	Coccocypselum P. Br.	COCCO3	Rubiaceae
coccoloba	Coccoloba P. Br.	COCCO	Polygonaceae
coccotrema lichen	Coccotrema Mull. Arg.	COCCO5	Coccotremataceae
coccotrema lichen	Coccotrema pocillarium (Cummings) Brodo	COPO5	Coccotremataceae
coccuswood	Brya P. Br.	BRYA	Fabaceae
Cochise dodder	Cuscuta mitriformis Engelm.	CUMI2	Cuscutaceae
Cochise scaly cloakfern	Astrolepis cochisensis (Goodding) Benham & Windham	ASCO42	Pteridaceae
Cochise scaly cloakfern	Astrolepis cochisensis (Goodding) Benham & Windham ssp. cochisensis	ASCOC3	Pteridaceae
Cochise sedge	Carex ultra Bailey	CAUL	Cyperaceae
cochleanthes	Cochleanthes Raf.	COCHL2	Orchidaceae
cochlospermum	Cochlospermum Kunth	COCHL5	Bixaceae
cock's comb	Celosia L.	CELOS	Amaranthaceae
cockspur hawthorn	Crataegus crus-galli L.	CRCR2	Rosaceae
coco yam	Colocasia esculenta (L.) Schott	COES	Araceae
coco yam	Colocasia esculenta (L.) Schott var. esculenta	COESE	Araceae
coconut palm	Cocos L.	COCOS	Arecaceae
coconut palm	Cocos nucifera L.	CONU	Arecaceae
codiaeum	Codiaeum Juss.	CODIA	Euphorbiaceae
Cody's rockcress	Arabis codyi G. Mulligan	ARCO39	Brassicaceae
coenogonium lichen	Coenogonium Ehrenb.	COENO	Gyalectaceae
coenogonium lichen	Coenogonium implexum Nyl.	COIM	Gyalectaceae
coenogonium lichen	Coenogonium interplexum Nyl.	COIN10	Gyalectaceae
coenogonium lichen	Coenogonium interpositum Nyl.	COIN11	Gyalectaceae
coenogonium lichen	Coenogonium moniliforme Tuck.	COMO5	Gyalectaceae
coffea	Coffea stenophylla G. Don	COST17	Rubiaceae
coffee	Coffea L.	COFFE	Rubiaceae
cohoba tree	Anadenanthera peregrina (L.) Speg.	ANPE13	Fabaceae
cohosh	Caulophyllum Michx.	CAULO	Berberidaceae
coiled sedge	Carex circinata C.A. Mey.	CACI5	Cyperaceae
cojite blanco	Commelina rufipes Seubert	CORU6	Commelinaceae
cojite blanco	Commelina rufipes Seubert var. glabrata (D. Hunt) Faden & D.R. Hunt	CORUG	Commelinaceae
cojite morado	Callisia monandra (Sw.) J.A. & J.H. Schultes	CAMO25	Commelinaceae
cojoba	Cojoba Britt. & Rose	COJOB	Fabaceae
cola	Cola pachycarpa Schumann	COPA33	Sterculiaceae
cola	Cola Schott & Endl.	COLA15	Sterculiaceae
cola	Cola verticillata (Thonn.) Stapf ex A. Chev.	COVE10	Sterculiaceae
colchicum	Colchicum L.	COLCH	Liliaceae
cold brachythecium moss	Brachythecium frigidum (C. Müll.) Besch.	BRFR70	Brachytheciaceae
coldwater fumewort	Corydalis caseana Gray ssp. aquae-gelidae (M.E. Peck & Wilson) Zetterlund & Lidén	COCAA	Fumariaceae
coleogyne	Coleogyne Torr.	COLEO	Rosaceae
Cole's hawthorn	Crataegus coleae Sarg.	CRCO4	Rosaceae
coleus	Coleus barbatus (Andrews) Benth.	COBA10	Lamiaceae
coleus	Coleus Lour.	COLEU	Lamiaceae
colicroot	Aletris L.	ALETR	Liliaceae
Collins' rockcress	Arabis holboellii Hornem. var. collinsii (Fern.) Rollins	ARHOC	Brassicaceae
Collins' sedge	Carex collinsii Nutt.	CACO21	Cyperaceae
colocasia	Colocasia Schott	COLOC	Araceae
colocynth	Citrullus colocynthis (L.) Schrad.	CICO7	Cucurbitaceae
cologania	Cologania Kunth	COLOG	Fabaceae
Colombian waxweed	Cuphea carthagenensis (Jacq.) J.F. Macbr.	CUCA4	Lythraceae
colonial bentgrass	Agrostis capillaris L.	AGCA5	Poaceae
Colorado aletes	Aletes humilis Coult. & Rose	ALHU	Apiaceae
Colorado alpine columbine	Aquilegia caerulea James var. alpina A. Nels.	AQCAA2	Ranunculaceae
Colorado barberry	Berberis fendleri Gray	BEFE	Berberidaceae
Colorado blue columbine	Aquilegia caerulea James	AQCA2	Ranunculaceae
Colorado blue columbine	Aquilegia caerulea James var. caerulea	AQCAC2	Ranunculaceae
Colorado blue columbine	Aquilegia caerulea James var. pinetorum (Tidestrom) Payson ex Kearney & Peebles	AQCAP	Ranunculaceae
Colorado buckhorn cholla	Cylindropuntia acanthocarpa (Engelm. & Bigelow) F.M. Knuth var. coloradensis (L. Benson) Pinkava	CYACC2	Cactaceae
Colorado cracked lichen	Acarospora coloradiana H. Magn.	ACCO10	Acarosporaceae
Colorado spiny milkvetch	Astragalus kentrophyta Gray var. coloradoensis M.E. Jones	ASKEC	Fabaceae
Colton's milkvetch	Astragalus coltonii M.E. Jones	ASCO8	Fabaceae
Colton's milkvetch	Astragalus coltonii M.E. Jones var. coltonii	ASCOC8	Fabaceae
Columbia brome	Bromus vulgaris (Hook.) Shear	BRVU	Poaceae
Columbia Gorge rockcress	Arabis furcata S. Wats.	ARFU	Brassicaceae
Columbia Gorge rockcress	Arabis furcata S. Wats. var. furcata	ARFUF2	Brassicaceae
Columbia Gorge rockcress	Arabis furcata S. Wats. var. olympica (Piper) Rollins	ARFUO	Brassicaceae
Columbia milkvetch	Astragalus succumbens Dougl. ex Hook.	ASSU7	Fabaceae
Columbia needlegrass	Achnatherum nelsonii (Scribn.) Barkworth	ACNE9	Poaceae
Columbia needlegrass	Achnatherum nelsonii (Scribn.) Barkworth ssp. nelsonii	ACNEN2	Poaceae
Columbia River wormwood	Artemisia lindleyana Bess.	ARLI2	Asteraceae
columbiadoria	Columbiadoria Nesom	COLUM2	Asteraceae
Columbian bryoerythrophyllum moss	Bryoerythrophyllum columbianum (Herm. & Lawt.) Zand.	BRCO13	Pottiaceae
Columbian milkvetch	Astragalus columbianus Barneby	ASCO9	Fabaceae
Columbian monkshood	Aconitum columbianum Nutt.	ACCO4	Ranunculaceae
Columbian monkshood	Aconitum columbianum Nutt. ssp. columbianum	ACCOC3	Ranunculaceae
Columbian monkshood	Aconitum columbianum Nutt. ssp. viviparum (Greene) D.E. Brink	ACCOV2	Ranunculaceae
Columbian onion	Allium columbianum (Ownbey & Mingrone) P. Peterson, Annable & Rieseberg	ALCO2	Liliaceae
Columbian rockcress	Arabis sparsiflora Nutt. var. columbiana (Macoun) Rollins	ARSPC2	Brassicaceae
Columbian sedge	Carex aperta Boott	CAAP3	Cyperaceae
Columbian windflower	Anemone deltoidea Hook.	ANDE3	Ranunculaceae
columbine	Aquilegia L.	AQUIL	Ranunculaceae
columnea	Columnea L.	COLUM	Gesneriaceae
Colusa cryptantha	Cryptantha nemaclada Greene	CRNE	Boraginaceae
colutea	Colutea L.	COLUT	Fabaceae
colza	Brassica rapa L. var. silvestris (Lam.) Briggs	BRRAS3	Brassicaceae
comal nakedwood	Colubrina stricta Engelm. ex M.C. Johnston	COST6	Rhamnaceae
comarum	Comarum L.	COMAR3	Rosaceae
comb windmill grass	Chloris pectinata Benth.	CHPE80	Poaceae
combleaf yellow false foxglove	Aureolaria pectinata (Nutt.) Pennell	AUPE	Scrophulariaceae
commelina	Commelina coelestis Willd.	COCO28	Commelinaceae
commelina	Commelina tuberosa L.	COTU5	Commelinaceae
common asparagus fern	Asparagus setaceus (Kunth) Jessop	ASSE12	Liliaceae
common bamboo	Bambusa vulgaris Schrad. ex J.C. Wendl.	BAVU2	Poaceae
common barberry	Berberis vulgaris L.	BEVU	Berberidaceae
common bearpoppy	Arctomecon humilis Coville	ARHU3	Papaveraceae
common beet	Beta vulgaris L.	BEVU2	Chenopodiaceae
common borage	Borago officinalis L.	BOOF	Boraginaceae
common box	Buxus sempervirens L.	BUSE2	Buxaceae
common brassbuttons	Cotula coronopifolia L.	COCO7	Asteraceae
common bugle	Ajuga reptans L.	AJRE	Lamiaceae
common bugloss	Anchusa officinalis L.	ANOF	Boraginaceae
common bugseed	Corispermum pacificum Mosyakin	COPA37	Chenopodiaceae
common buttonbush	Cephalanthus occidentalis L.	CEOC2	Rubiaceae
common calabash tree	Crescentia cujete L.	CRCU	Bignoniaceae
common carpetgrass	Axonopus fissifolius (Raddi) Kuhlm.	AXFI	Poaceae
common corncockle	Agrostemma githago L.	AGGI	Caryophyllaceae
common crupina	Crupina vulgaris Cass.	CRVU2	Asteraceae
common crupina	Crupina vulgaris Cass. var. vulgaris	CRVUV	Asteraceae
common dittany	Cunila origanoides (L.) Britt.	CUOR	Lamiaceae
common fiddleneck	Amsinckia menziesii (Lehm.) A. Nels. & J.F. Macbr. var. intermedia (Fisch & C.A. Mey.) Ganders	AMMEI2	Boraginaceae
common filbert	Corylus avellana L.	COAV80	Betulaceae
common goldenstar	Bloomeria crocea (Torr.) Coville	BLCR	Liliaceae
common goldenstar	Bloomeria crocea (Torr.) Coville var. aurea (Kellogg) Ingram	BLCRA	Liliaceae
common goldenstar	Bloomeria crocea (Torr.) Coville var. crocea	BLCRC	Liliaceae
common goldenstar	Bloomeria crocea (Torr.) Coville var. montana (Greene) Ingram	BLCRM	Liliaceae
common green bryum moss	Bryum pseudotriquetrum (Hedw.) P. Gaertn., B. Mey. & Scherb.	BRPS70	Bryaceae
common gum cistus	Cistus ladanifer L.	CILA10	Cistaceae
common hackberry	Celtis occidentalis L.	CEOC	Ulmaceae
common kidneyvetch	Anthyllis vulneraria L.	ANVU	Fabaceae
common ladyfern	Athyrium filix-femina (L.) Roth	ATFI	Dryopteridaceae
common leopardbane	Arnica acaulis (Walt.) B.S.P.	ARAC3	Asteraceae
common maidenhair	Adiantum capillus-veneris L.	ADCA	Pteridaceae
common marshmallow	Althaea officinalis L.	ALOF2	Malvaceae
common medicineplant	Adenostemma lavenia (L.) Kuntze	ADLA2	Asteraceae
common milkweed	Asclepias syriaca L.	ASSY	Asclepiadaceae
common moonwort	Botrychium lunaria (L.) Sw.	BOLU	Ophioglossaceae
common mouse-ear chickweed	Cerastium fontanum Baumg.	CEFO2	Caryophyllaceae
common netbush	Calothamnus quadrifidus R.Br.	CAQU10	Myrtaceae
common oat	Avena sativa L.	AVSA	Poaceae
common pussypaws	Cistanthe monandra (Nutt.) Hershkovitz	CIMO4	Portulacaceae
common sandaster	Corethrogyne filaginifolia (Hook. & Arn.) Nutt.	COFI2	Asteraceae
common sandaster	Corethrogyne filaginifolia (Hook. & Arn.) Nutt. var. filaginifolia	COFIF	Asteraceae
common sandweed	Athysanus pusillus (Hook.) Greene	ATPU	Brassicaceae
common serviceberry	Amelanchier arborea (Michx. f.) Fern.	AMAR3	Rosaceae
common serviceberry	Amelanchier arborea (Michx. f.) Fern. var. arborea	AMARA4	Rosaceae
common spring-gold	Crocidium multicaule Hook.	CRMU	Asteraceae
common stickyseed	Blennosperma nanum (Hook.) Blake	BLNA	Asteraceae
common stickyseed	Blennosperma nanum (Hook.) Blake var. nanum	BLNAN	Asteraceae
common stickyseed	Blennosperma nanum (Hook.) Blake var. robustum J.T. Howell	BLNAR	Asteraceae
common tarweed	Centromadia pungens (Hook. & Arn.) Greene ssp. laevis (Keck) B.G. Baldwin	CEPUL	Asteraceae
common tarweed	Centromadia pungens (Hook. & Arn.) Greene ssp. maritima (Greene) B.G. Baldwin	CEPUM	Asteraceae
common tarweed	Centromadia pungens (Hook. & Arn.) Greene ssp. pungens	CEPUP6	Asteraceae
common tarweed	Centromadia pungens (Hook. & Arn.) Greene ssp. septentrionalis (Keck) B.G. Baldwin	CEPUS2	Asteraceae
common threeseed mercury	Acalypha rhomboidea Raf.	ACRH	Euphorbiaceae
common turmeric	Curcuma longa L.	CULO	Zingiberaceae
common wormwood	Artemisia vulgaris L.	ARVU	Asteraceae
common wormwood	Artemisia vulgaris L. var. kamtschatica Bess.	ARVUK	Asteraceae
common wormwood	Artemisia vulgaris L. var. vulgaris	ARVUV	Asteraceae
common yarrow	Achillea millefolium L.	ACMI2	Asteraceae
common yarrow	Achillea millefolium L. var. alpicola (Rydb.) Garrett	ACMIA	Asteraceae
common yarrow	Achillea millefolium L. var. arenicola (Heller) Nobs	ACMIA2	Asteraceae
common yarrow	Achillea millefolium L. var. millefolium	ACMIM2	Asteraceae
common yarrow	Achillea millefolium L. var. nigrescens E. Mey.	ACMIN	Asteraceae
common yarrow	Achillea millefolium L. var. puberula (Rydb.) Nobs	ACMIP2	Asteraceae
compact brome	Bromus matritensis L.	BRMA16	Poaceae
compact cobwebby thistle	Cirsium occidentale (Nutt.) Jepson var. compactum Hoover	CIOCC2	Asteraceae
compact conardia moss	Conardia compacta (C. Müll.) Robins.	COCO31	Amblystegiaceae
compact cryptantha	Cryptantha compacta Higgins	CRCO17	Boraginaceae
compact dodder	Cuscuta compacta Juss. ex Choisy	CUCO2	Cuscutaceae
compact dodder	Cuscuta compacta Juss. ex Choisy var. compacta	CUCOC	Cuscutaceae
compact dodder	Cuscuta compacta Juss. ex Choisy var. efimbriata Yuncker	CUCOE	Cuscutaceae
compact earth lichen	Catapyrenium compactum (A. Massal.) R. Sant.	CACO65	Verrucariaceae
compact onion	Allium vineale L. ssp. compactum (Thuill.) Coss. & Germ.	ALVIC3	Liliaceae
comparettia	Comparettia Poepp. & Endl.	COMPA	Orchidaceae
composite rimmed lichen	Aspicilia composita (Lynge) J. W. Thomson	ASCO43	Hymeneliaceae
conardia moss	Conardia Robins.	CONAR	Amblystegiaceae
concolor lemon lichen	Candelaria concolor (Dickson) Stein	CACO64	Candelariaceae
concolor lemon lichen	Candelaria concolor (Dickson) Stein var. effusa (Tuck.) G. Merr. & Burnham	CACOE	Candelariaceae
Concord hawthorn	Crataegus ideae Sarg.	CRID	Rosaceae
conelike milkvetch	Astragalus whitneyi Gray var. confusus Barneby	ASWHC	Fabaceae
Confederate bulbothrix lichen	Bulbothrix confoederata (Culb.) Hale	BUCO4	Parmeliaceae
confederate hawthorn	Crataegus mira Beadle	CRMI10	Rosaceae
confused astrothelium lichen	Astrothelium confusum Mull. Arg.	ASCO47	Trypetheliaceae
Congdon's milkvetch	Astragalus congdonii S. Wats.	ASCO10	Fabaceae
Congdon's onion	Allium sanbornii Wood var. congdonii Jepson	ALSAC	Liliaceae
Congdon's sedge	Carex congdonii Bailey	CACO12	Cyperaceae
Congdon's tarweed	Centromadia parryi (Greene) Greene ssp. congdonii (Robins. & Greenm.) B.G. Baldwin	CEPAC	Asteraceae
congea	Congea Roxb.	CONGE	Verbenaceae
conglomerate jelly lichen	Collema conglomeratum Hoffm.	COCO26	Collemataceae
conglomerate jelly lichen	Collema conglomeratum Hoffm. var. crassiusculum (Malme) Degel.	COCOC4	Collemataceae
congo coffee	Coffea congensis Froehner	COCO27	Rubiaceae
conimitella	Conimitella Rydb.	CONIM	Saxifragaceae
coniogramme	Coniogramme Fée	CONIO2	Pteridaceae
Connecticut beggarticks	Bidens heterodoxa (Fern.) Fern. & St. John	BIHE2	Asteraceae
Connecticut hawthorn	Crataegus pequotorum Sarg.	CRPE17	Rosaceae
conostomum moss	Conostomum Sw. in Web. & Mohr	CONOS2	Bartramiaceae
conostomum moss	Conostomum tetragonum (Hedw.) Lindb.	COTE70	Bartramiaceae
conotrema lichen	Conotrema Tuck.	CONOT	Stictidaceae
conspicuous reindeer lichen	Cladina conspicua Ahti	CLCO11	Cladoniaceae
Constance's bittercress	Cardamine constancei Detling	CACO27	Brassicaceae
Constance's rockcress	Arabis constancei Rollins	ARCO12	Brassicaceae
Constance's springparsley	Cymopterus constancei R.L. Hartman	CYCO22	Apiaceae
Contance's sedge	Carex constanceana Stacey	CACO80	Cyperaceae
contorted rimmed lichen	Aspicilia contorta (Hoffm.) Krempelh.	ASCO46	Hymeneliaceae
Contra Costa manzanita	Arctostaphylos manzanita Parry ssp. laevigata (Eastw.) Munz	ARMAL	Ericaceae
contracted ricegrass	Achnatherum contractum (B.L. Johnson) Barkworth	ACCO22	Poaceae
Contura Creek sandmat	Chamaesyce ocellata (Dur. & Hilg.) Millsp.	CHOC	Euphorbiaceae
Contura Creek sandmat	Chamaesyce ocellata (Dur. & Hilg.) Millsp. ssp. arenicola (Parish) Thorne	CHOCA	Euphorbiaceae
Contura Creek sandmat	Chamaesyce ocellata (Dur. & Hilg.) Millsp. ssp. ocellata	CHOCO	Euphorbiaceae
convallaria	Convallaria L.	CONVA	Liliaceae
convoluted barbula moss	Barbula convoluta Hedw.	BACO8	Pottiaceae
convoluted barbula moss	Barbula convoluta Hedw. var. convoluta	BACOC	Pottiaceae
convoluted barbula moss	Barbula convoluta Hedw. var. gallinula Zand.	BACOG	Pottiaceae
cooba	Acacia salicina Lindl.	ACSA10	Fabaceae
Cook's spleenwort	Asplenium cookii Copeland	ASCO59	Aspleniaceae
coon's tail	Ceratophyllum demersum L.	CEDE4	Ceratophyllaceae
Cooper's cyathea	Cyathea cooperi (Hook. ex F. Muell.) Domin	CYCO18	Cyatheaceae
Cooper's dogweed	Adenophyllum cooperi (Gray) Strother	ADCO2	Asteraceae
Cooper's lipfern	Cheilanthes cooperae D.C. Eat.	CHCO3	Pteridaceae
Cooper's milkvetch	Astragalus neglectus (Torr. & Gray) Sheldon	ASNE2	Fabaceae
Cooper's wild cabbage	Caulanthus cooperi (S. Wats.) Payson	CACO18	Brassicaceae
cootamundra wattle	Acacia baileyana F. Muell.	ACBA	Fabaceae
copaiba	Copaifera officinalis (Jacq.) L.	COOF2	Fabaceae
copaifera	Copaifera L.	COPAI	Fabaceae
copaifera	Copaifera multijuga Hayne	COMU7	Fabaceae
Copenhagen hawthorn	Crataegus intricata Lange	CRIN3	Rosaceae
copernicia	Copernicia alba Morong ex Morong & Britton	COAL13	Arecaceae
copernicia	Copernicia C. Martius ex Endl.	COPER	Arecaceae
copper fern	Bommeria hispida (Mett. ex Kuhn) Underwood	BOHI	Pteridaceae
copper mine milkvetch	Astragalus cobrensis Gray	ASCO5	Fabaceae
copper mine milkvetch	Astragalus cobrensis Gray var. cobrensis	ASCOC6	Fabaceae
copperleaf	Acalypha L.	ACALY	Euphorbiaceae
coppery false fanpetals	Billieturnera helleri (Rose ex Heller) Fryxell	BIHE4	Malvaceae
coral gilia	Aliciella subnuda (Torr. ex Gray) J.M. Porter	ALSU9	Polemoniaceae
coral jelly lichen	Collema tenax (Sw.) Ach. var. corallinum (A. Massal.) Degel.	COTEC4	Collemataceae
coral orange lichen	Caloplaca coralloides (Tuck.) Hulting	CACO63	Teloschistaceae
coral vine	Antigonon leptopus Hook. & Arn.	ANLE4	Polygonaceae
coralbead	Cocculus DC.	COCCU	Menispermaceae
coralroot	Corallorhiza Gagnebin	CORAL5	Orchidaceae
coralroot bittercress	Cardamine bulbifera (L.) Crantz	CABU12	Brassicaceae
corchorus	Corchorus L.	CORCH	Tiliaceae
cordia	Cordia L.	CORDI	Boraginaceae
Cordilleran sedge	Carex cordillerana Saarela & B.A. Ford	CACO81	Cyperaceae
cordyla	Cordyla africana Lour.	COAF2	Fabaceae
cordyla	Cordyla Lour.	CORDY3	Fabaceae
cordyline	Cordyline Comm. ex R. Br.	CORDY2	Liliaceae
corema	Corema D. Don	COREM	Empetraceae
coreocarpus	Coreocarpus Benth.	COREO	Asteraceae
coriander	Coriandrum L.	CORIA	Apiaceae
coriander	Coriandrum sativum L.	COSA	Apiaceae
corita	Agave missionum Trel.	AGMI4	Agavaceae
corkbark fir	Abies lasiocarpa (Hook.) Nutt. var. arizonica (Merriam) Lemmon	ABLAA	Pinaceae
corkscrew beggarticks	Bidens torta Sherff	BITO	Asteraceae
corkscrew threeawn	Aristida gyrans Chapman	ARGY	Poaceae
corn brome	Bromus squarrosus L.	BRSQ2	Poaceae
corn chamomile	Anthemis arvensis L.	ANAR6	Asteraceae
corn gromwell	Buglossoides arvensis (L.) I.M. Johnston	BUAR3	Boraginaceae
corncockle	Agrostemma L.	AGROS	Caryophyllaceae
Cornelian cherry	Cornus mas L.	COMA21	Cornaceae
cornutia	Cornutia L.	CORNU2	Verbenaceae
Correll's snakewood	Condalia correllii M.C. Johnston	COCO11	Rhamnaceae
corrigiola	Corrigiola L.	CORRI	Caryophyllaceae
corryocactus	Corryocactus Britton & Rose	CORRY	Cactaceae
Cortez's croton	Croton cortesianus Kunth	CRCO9	Euphorbiaceae
corticifraga lichen	Corticifraga D. Hawksw. & R. Sant.	CORTI	Uncertain Lichen Family
corymbia	Corymbia K.D. Hill & L.A. Johnson	CORYM3	Myrtaceae
corymbose caper	Capparis corymbosa Lam.	CACO29	Capparaceae
corynocarpus	Corynocarpus J.R. & G. Forst.	CORYN2	Corynocarpaceae
Cory's croton	Croton coryi Croizat	CRCO10	Euphorbiaceae
Cory's dutchman's pipe	Aristolochia coryi I.M. Johnston	ARCO8	Aristolochiaceae
coscinodon moss	Coscinodon arctolimnius (Steere) Steere	COAR14	Grimmiaceae
coscinodon moss	Coscinodon calyptratus (Hook. in Drumm.) C. Jens. ex Kindb.	COCA70	Grimmiaceae
coscinodon moss	Coscinodon cribrosus (Hedw.) Spruce	COCR70	Grimmiaceae
coscinodon moss	Coscinodon Spreng.	COSCI2	Grimmiaceae
cosmos	Cosmos Cav.	COSMO	Asteraceae
cosmosflower beggarticks	Bidens cosmoides (Gray) Sherff	BICO6	Asteraceae
Costa Rican lady's tresses	Beloglottis costaricensis (Reichenb. f.) Schlechter	BECO5	Orchidaceae
costus	Costus L.	COSTU	Costaceae
cotoneaster	Cotoneaster integerrimus Medik.	COIN16	Rosaceae
cotoneaster	Cotoneaster Medik.	COTON	Rosaceae
cotoneaster	Cotoneaster multiflorus Bunge	COMU9	Rosaceae
cotoneaster	Cotoneaster salicifolius Franch.	COSA4	Rosaceae
cotta grass	Cottea Kunth	COTTE	Poaceae
cotta grass	Cottea pappophoroides Kunth	COPA13	Poaceae
Cottam's milkvetch	Astragalus monumentalis Barneby var. cottamii (Welsh) Isely	ASMOC2	Fabaceae
Cotton's milkvetch	Astragalus cottonii M.E. Jones	ASCO13	Fabaceae
cottontree	Bombax L.	BOMBA	Bombacaceae
Cottonwood Springs suncup	Camissonia exilis (Raven) Raven	CAEX10	Onagraceae
cottony goldenaster	Chrysopsis gossypina (Michx.) Ell.	CHGO	Asteraceae
cottony goldenaster	Chrysopsis gossypina (Michx.) Ell. ssp. cruiseana (Dress) Semple	CHGOC	Asteraceae
cottony goldenaster	Chrysopsis gossypina (Michx.) Ell. ssp. gossypina	CHGOG	Asteraceae
cottony goldenaster	Chrysopsis gossypina (Michx.) Ell. ssp. hyssopifolia (Nutt.) Semple	CHGOH	Asteraceae
Coulter's brickellbush	Brickellia coulteri Gray	BRCO	Asteraceae
Coulter's saltbush	Atriplex coulteri (Moq.) D. Dietr.	ATCO5	Chenopodiaceae
Coulter's spiderling	Boerhavia coulteri (Hook. f.) S. Wats.	BOCO2	Nyctaginaceae
Coulter's wild cabbage	Caulanthus coulteri S. Wats.	CACO38	Brassicaceae
Countess Dalhousie's spleenwort	Asplenium dalhousiae Hook.	ASDA	Aspleniaceae
country Indian paintbrush	Castilleja flava S. Wats. var. rustica (Piper) N. Holmgren	CAFLR	Scrophulariaceae
Coville ceanothus	Ceanothus pinetorum Coville	CEPI	Rhamnaceae
Coville's dwarf sand verbena	Abronia nana S. Wats. var. covillei (Heimerl) Munz	ABNAC	Nyctaginaceae
Coville's Indian paintbrush	Castilleja covilleana Henderson	CACO36	Scrophulariaceae
Coville's lipfern	Cheilanthes covillei Maxon	CHCO4	Pteridaceae
Coville's mule-ears	Agnorhiza invenusta (Greene) W.A. Weber	AGIN8	Asteraceae
Coville's serviceberry	Amelanchier utahensis Koehne var. covillei (Standl.) N. Holmgren	AMUTC2	Rosaceae
Cow Spring milkvetch	Astragalus vaccarum Gray	ASVA2	Fabaceae
cow tree	Brosimum utile (Kunth) Pittier	BRUT	Moraceae
Cowell's sandmat	Chamaesyce cowellii Millsp. ex Britt.	CHCO8	Euphorbiaceae
cow's-foot	Bauhinia forficata Link	BAFO	Fabaceae
Cox's mariposa lily	Calochortus coxii M. Godfrey & F. Callahan	CACO41	Liliaceae
coyol palm	Acrocomia vinifera Oersted	ACVI6	Arecaceae
coyor	Aiphanes corallina (C. Martius) H. A. Wendl. ex Griseb.	AICO	Arecaceae
Coyote ceanothus	Ceanothus ferrisiae McMinn	CEFE2	Rhamnaceae
coyote gilia	Aliciella triodon (Eastw.) Brand	ALTR14	Polemoniaceae
coyote gourd	Cucurbita palmata S. Wats.	CUPA	Cucurbitaceae
coyotebrush	Baccharis pilularis DC.	BAPI	Asteraceae
coyure palm	Aiphanes caryotifolia (Kunth) H. A. Wendl.	AICA5	Arecaceae
crabwood	Carapa guianensis Aublet	CAGU6	Meliaceae
cracked lichen	Acarospora A. Massal.	ACARO2	Acarosporaceae
cracked lichen	Acarospora aeruginosa Hasse	ACAE	Acarosporaceae
cracked lichen	Acarospora albomarginata (Herre) Salisb.	ACAL13	Acarosporaceae
cracked lichen	Acarospora applanata H. Magn.	ACAP	Acarosporaceae
cracked lichen	Acarospora arenacea H. Magn.	ACAR8	Acarosporaceae
cracked lichen	Acarospora arenosa Herre	ACAR9	Acarosporaceae
cracked lichen	Acarospora asperata H. Magn.	ACAS4	Acarosporaceae
cracked lichen	Acarospora badiofusca (Nyl.) Th. Fr.	ACBA4	Acarosporaceae
cracked lichen	Acarospora bullata Anzi	ACBU2	Acarosporaceae
cracked lichen	Acarospora caesiofusca (Mull. Arg.) H. Magn.	ACCA14	Acarosporaceae
cracked lichen	Acarospora cervina A. Massal.	ACCE	Acarosporaceae
cracked lichen	Acarospora cinereoalba (Fink) H. Magn.	ACCI2	Acarosporaceae
cracked lichen	Acarospora complanata H. Magn.	ACCO11	Acarosporaceae
cracked lichen	Acarospora desolata H. Magn.	ACDE9	Acarosporaceae
cracked lichen	Acarospora dispersa H. Magn.	ACDI4	Acarosporaceae
cracked lichen	Acarospora elevata H. Magn.	ACEL2	Acarosporaceae
cracked lichen	Acarospora fuscata (Schrader) Arnold	ACFU2	Acarosporaceae
cracked lichen	Acarospora fuscescens H. Magn.	ACFU3	Acarosporaceae
cracked lichen	Acarospora geogena H. Magn.	ACGE4	Acarosporaceae
cracked lichen	Acarospora glaucocarpa (Ach.) Korber	ACGL2	Acarosporaceae
cracked lichen	Acarospora hilaris (Dufour) Hue	ACHI6	Acarosporaceae
cracked lichen	Acarospora impressula Th. Fr.	ACIM3	Acarosporaceae
cracked lichen	Acarospora instrata H. Magn.	ACIN5	Acarosporaceae
cracked lichen	Acarospora interjecta H. Magn.	ACIN6	Acarosporaceae
cracked lichen	Acarospora interposita H. Magn.	ACIN7	Acarosporaceae
cracked lichen	Acarospora interspersa H. Magn.	ACIN8	Acarosporaceae
cracked lichen	Acarospora nitida H. Magn.	ACNI7	Acarosporaceae
cracked lichen	Acarospora obnubila H. Magn.	ACOB4	Acarosporaceae
cracked lichen	Acarospora obpallens H. Magn.	ACOB5	Acarosporaceae
cracked lichen	Acarospora oligospora (Nyl.) Arnold	ACOL	Acarosporaceae
cracked lichen	Acarospora peliscypha Th. Fr.	ACPE6	Acarosporaceae
cracked lichen	Acarospora peltastica Zahlbr.	ACPE7	Acarosporaceae
cracked lichen	Acarospora pyrenopsoides H. Magn.	ACPY2	Acarosporaceae
cracked lichen	Acarospora radicata H. Magn.	ACRA4	Acarosporaceae
cracked lichen	Acarospora rugulosa Korber	ACRU5	Acarosporaceae
cracked lichen	Acarospora saepincola H. Magn.	ACSA6	Acarosporaceae
cracked lichen	Acarospora scabrida Hedl. ex H. Magn.	ACSC4	Acarosporaceae
cracked lichen	Acarospora scotica Hue	ACSC6	Acarosporaceae
cracked lichen	Acarospora sinopica (Wahlenb.) Korber	ACSI4	Acarosporaceae
cracked lichen	Acarospora smaragdula (Wahlenb.) A. Massal.	ACSM2	Acarosporaceae
cracked lichen	Acarospora socialis H. Magn.	ACSO2	Acarosporaceae
cracked lichen	Acarospora sparsa H. Magn.	ACSP6	Acarosporaceae
cracked lichen	Acarospora stapfiana (Mull. Arg.) Hue	ACST2	Acarosporaceae
cracked lichen	Acarospora strigata (Nyl.) Jatta	ACST3	Acarosporaceae
cracked lichen	Acarospora succedens H. Magn.	ACSU5	Acarosporaceae
cracked lichen	Acarospora superfusa H. Magn.	ACSU6	Acarosporaceae
cracked lichen	Acarospora tenebrica H. Magn.	ACTE5	Acarosporaceae
cracked lichen	Acarospora terricola H. Magn.	ACTE6	Acarosporaceae
cracked lichen	Acarospora thamnina (Tuck.) Herre	ACTH4	Acarosporaceae
cracked lichen	Acarospora thelococcoides (Nyl.) Zahlbr.	ACTH5	Acarosporaceae
cracked lichen	Acarospora veronensis A. Massal.	ACVE4	Acarosporaceae
crackopen	Casearia sylvestris Sw.	CASY2	Flacourtiaceae
crambe	Crambe abyssinica Hochst. ex R. E. Fries	CRAB5	Brassicaceae
crambe	Crambe L.	CRAMB	Brassicaceae
cranberry cotoneaster	Cotoneaster apiculatus Rehd. & E.H. Wilson	COAP3	Rosaceae
Crandall's rockcress	Arabis crandallii B.L. Robins.	ARCR5	Brassicaceae
cranichis-like ladies'-tresses	Cyclopogon cranichoides (Griseb.) Schlechter	CYCR10	Orchidaceae
craniolaria	Craniolaria L.	CRANI2	Pedaliaceae
Crater Lake grapefern	Botrychium pumicola Coville ex Underwood	BOPU2	Ophioglossaceae
Crater Lake sandwort	Arenaria pumicola Coville & Leib.	ARPU6	Caryophyllaceae
craterostigma	Craterostigma Hochst.	CRATE3	Scrophulariaceae
crateva	Crateva L.	CRATE2	Capparaceae
cratoneuron moss	Cratoneuron (Sull.) Spruce	CRATO2	Amblystegiaceae
cratoneuron moss	Cratoneuron filicinum (Hedw.) Spruce	CRFI70	Amblystegiaceae
Crawe's sedge	Carex crawei Dewey	CACR3	Cyperaceae
Crawford's sedge	Carex crawfordii Fern.	CACR4	Cyperaceae
cream albizia	Albizia adinocephala (J.D. Sm.) Britt. & Rose ex Record	ALAD	Fabaceae
cream milkvetch	Astragalus racemosus Pursh	ASRA2	Fabaceae
cream milkvetch	Astragalus racemosus Pursh var. longisetus M.E. Jones	ASRAL	Fabaceae
cream milkvetch	Astragalus racemosus Pursh var. racemosus	ASRAR2	Fabaceae
cream sacs	Castilleja rubicundula (Jepson) Chuang & Heckard	CARU20	Scrophulariaceae
cream sacs	Castilleja rubicundula (Jepson) Chuang & Heckard ssp. lithospermoides (Benth.) Chuang & Heckard	CARUL	Scrophulariaceae
cream sacs	Castilleja rubicundula (Jepson) Chuang & Heckard ssp. rubicundula	CARUR2	Scrophulariaceae
creamflower rockcress	Arabis hirsuta (L.) Scop. var. pycnocarpa (M. Hopkins) Rollins	ARHIP	Brassicaceae
creek wattle	Acacia rivalis J. M. Black	ACRI7	Fabaceae
creeping bentgrass	Agrostis stolonifera L.	AGST2	Poaceae
creeping bluestar	Amsonia repens Shinners	AMRE3	Apocynaceae
creeping cotoneaster	Cotoneaster adpressus Boiss.	COAD	Rosaceae
creeping inchplant	Callisia repens (Jacq.) L.	CARE8	Commelinaceae
creeping lady's nightcap	Bonamia repens (I.M. Johnston) Austin & Staples	BORE9	Convolvulaceae
creeping marshwort	Apium repens (Jacq.) Lag.	APRE	Apiaceae
creeping meadow foxtail	Alopecurus arundinaceus Poir.	ALAR	Poaceae
creeping milkvetch	Astragalus troglodytus S. Wats.	ASTR8	Fabaceae
creeping mirrorplant	Coprosma repens A. Rich.	CORE4	Rubiaceae
creeping sedge	Carex chordorrhiza Ehrh. ex L. f.	CACH5	Cyperaceae
creeping spiderling	Boerhavia spicata Choisy	BOSP	Nyctaginaceae
creeping spleenwort	Asplenium serra Langsd. & Fisch.	ASSE8	Aspleniaceae
creeping spotflower	Acmella decumbens (Sm.) R.K. Jansen	ACDE5	Asteraceae
creeping strapfern	Campyloneurum repens (Aubl.) K. Presl	CARE5	Polypodiaceae
creeping treefern	Cyathea armata (Sw.) Domin	CYAR13	Cyatheaceae
creeping waterhyssop	Bacopa repens (Sw.) Wettst.	BARE	Scrophulariaceae
creeping waxweed	Cuphea procumbens Ortega	CUPR	Lythraceae
creepingfern	Bolbitis Schott	BOLBI	Dryopteridaceae
crescent bugseed	Corispermum navicula Mosyakin	CONA4	Chenopodiaceae
Crescent milkvetch	Astragalus amphioxys Gray	ASAM5	Fabaceae
Crescent milkvetch	Astragalus amphioxys Gray var. amphioxys	ASAMA	Fabaceae
Crescent milkvetch	Astragalus amphioxys Gray var. modestus Barneby	ASAMM	Fabaceae
Crescent milkvetch	Astragalus amphioxys Gray var. musimonum (Barneby) Barneby	ASAMM2	Fabaceae
crescentia	Crescentia L.	CRESC	Bignoniaceae
crested anoda	Anoda cristata (L.) Schlecht.	ANCR2	Malvaceae
crested dogstail grass	Cynosurus cristatus L.	CYCR	Poaceae
crested goosefoot	Chenopodium cristatum (F. Muell.) F. Muell.	CHCR6	Chenopodiaceae
crested Philippine violet	Barleria cristata L.	BACR	Acanthaceae
crested pricklypoppy	Argemone polyanthemos (Fedde) G.B. Ownbey	ARPO2	Papaveraceae
crested saltbush	Atriplex cristata Humb. & Bonpl. ex Willd.	ATCR2	Chenopodiaceae
crested sedge	Carex cristatella Britt.	CACR7	Cyperaceae
crested wartycabbage	Bunias erucago L.	BUER	Brassicaceae
crested wheatgrass	Agropyron cristatum (L.) Gaertn.	AGCR	Poaceae
crested wheatgrass	Agropyron cristatum (L.) Gaertn. ssp. cristatum (L.) Gaertn. [excluded]	AGCRC	Poaceae
crested wheatgrass	Agropyron cristatum (L.) Gaertn. ssp. pectinatum (Bieb.) Tzvelev	AGCRP8	Poaceae
Cretan bryony	Bryonia cretica L.	BRCR2	Cucurbitaceae
Cretan bryony	Bryonia dioica Jacq.	BRDI5	Cucurbitaceae
Cretan meadow foxtail	Alopecurus creticus Trin.	ALCR7	Poaceae
Cretan rockrose	Cistus incanus L. ssp. creticus (L.) Heywood	CIINC2	Cistaceae
Creutzfeldt's cryptantha	Cryptantha creutzfeldtii Welsh	CRCR8	Boraginaceae
crevice flatsedge	Cyperus tenuis Sw.	CYTE4	Cyperaceae
cricket orchid	Brassia caudata (L.) Lindl.	BRCA7	Orchidaceae
cricketvine	Arrabidaea chica (Humb. & Bonpl.) Verl.	ARCH5	Bignoniaceae
crimson bottlebrush	Callistemon citrinus (Curtis) Skeels	CACI15	Myrtaceae
crinkled onion	Allium crispum Greene	ALCR5	Liliaceae
crinkleroot	Cardamine diphylla (Michx.) Wood	CADI10	Brassicaceae
crispleaf amaranth	Amaranthus crispus (Lesp. & Thev.) N. Terracc.	AMCR2	Amaranthaceae
crocosmia	Crocosmia Planch.	CROCO	Iridaceae
crocus	Crocus L.	CROCU	Iridaceae
crocynia lichen	Crocynia (Ach.) A. Massal.	CROCY	Crocyniaceae
crocynia lichen	Crocynia gossypina (Sw.) A. Massal.	CRGO2	Crocyniaceae
crocynia lichen	Crocynia pyxinoides Nyl.	CRPY3	Crocyniaceae
Cronquist's milkvetch	Astragalus cronquistii Barneby	ASCR4	Fabaceae
crookneck squash	Cucurbita moschata Duchesne	CUMO	Cucurbitaceae
croomia	Croomia pauciflora (Nutt.) Torr.	CRPA9	Stemonaceae
croomia	Croomia Torr.	CROOM	Stemonaceae
Cross Mountain rockcress	Arabis williamsii Rollins var. saximontana (Rollins) Rollins	ARWIS	Brassicaceae
crossandra	Crossandra Salisb.	CROSS5	Acanthaceae
crossflower	Chorispora tenella (Pallas) DC.	CHTE2	Brassicaceae
crossidium moss	Crossidium aberrans Holz. & Bartr.	CRAB6	Pottiaceae
crossidium moss	Crossidium crassinerve (De Not.) Jur.	CRCR11	Pottiaceae
crossidium moss	Crossidium Jur.	CROSS4	Pottiaceae
crossidium moss	Crossidium seriatum Crum & Steere	CRSE10	Pottiaceae
crossidium moss	Crossidium squamiferum (Viv.) Jur.	CRSQ	Pottiaceae
crossidium moss	Crossidium squamiferum (Viv.) Jur. var. pottioideum (De Not.) Mönk.	CRSQP	Pottiaceae
crossidium moss	Crossidium squamiferum (Viv.) Jur. var. squamiferum	CRSQS	Pottiaceae
crossopetalum	Crossopetalum P. Br.	CROSS	Celastraceae
crossvine	Bignonia capreolata L.	BICA	Bignoniaceae
croton	Croton heterocarpus Muell. Arg.	CRHE4	Euphorbiaceae
croton	Croton L.	CROTO	Euphorbiaceae
croton	Croton ripensis Kanehira & Hatusima	CRRI8	Euphorbiaceae
crow orchid	Corymborkis Thouars	CORYM2	Orchidaceae
crown brodiaea	Brodiaea coronaria (Salisb.) Engl.	BRCO3	Liliaceae
crown brodiaea	Brodiaea coronaria (Salisb.) Engl. ssp. coronaria	BRCOC	Liliaceae
crown bulbothrix lichen	Bulbothrix coronata (Fee) Hale	BUCO5	Parmeliaceae
crown tickseed	Coreopsis nuecensis Heller	CONU3	Asteraceae
crowned beggarticks	Bidens coronata (L.) Britt.	BICO	Asteraceae
crownscale	Atriplex coronata S. Wats.	ATCO3	Chenopodiaceae
crownscale	Atriplex coronata S. Wats. var. coronata	ATCOC	Chenopodiaceae
crownscale	Atriplex coronata S. Wats. var. notatior Jepson	ATCON	Chenopodiaceae
crownvetch	Coronilla L.	CORON	Fabaceae
crucianella	Crucianella L.	CRUCI	Rubiaceae
crucifixion thorn	Canotia holacantha Torr.	CAHO3	Celastraceae
crucifixion thorn	Castela emoryi (Gray) Moran & Felger	CAEM4	Simaroubaceae
crumia moss	Crumia deciduidentata Sharp & Iwats.	CRDE4	Pottiaceae
crumia moss	Crumia Schof.	CRUMI	Pottiaceae
crupina	Crupina (Pers.) DC.	CRUPI	Asteraceae
crusty jelly lichen	Collema tenax (Sw.) Ach. var. crustaceum (Krempelh.) Degel.	COTEC5	Collemataceae
cryphaea moss	Cryphaea glomerata Bruch & Schimp. ex Sull.	CRGL12	Cryphaeaceae
cryphaea moss	Cryphaea nervosa (Hook. & Wils. in Drumm.) C. Müll.	CRNE8	Cryphaeaceae
cryphaea moss	Cryphaea Web.	CRYPH	Cryphaeaceae
cryptantha	Cryptantha Lehm. ex G. Don	CRYPT	Boraginaceae
cryptocarya	Cryptocarya R. Br.	CRYPT2	Lauraceae
cryptolechia lichen	Cryptolechia A. Massal.	CRYPT11	Gyalectaceae
cryptolechia lichen	Cryptolechia carneolutea (Turner) A. Massal.	CRCA24	Gyalectaceae
cryptothele lichen	Cryptothele granuliformis (Nyl.) Henssen	CRGR14	Lichinaceae
cryptothele lichen	Cryptothele permiscens (Nyl.) Th. Fr.	CRPE15	Lichinaceae
cryptothele lichen	Cryptothele Th. Fr.	CRYPT12	Lichinaceae
ctenidium moss	Ctenidium (Schimp.) Mitt.	CTENI3	Hypnaceae
ctenidium moss	Ctenidium malacodes Mitt.	CTMA	Hypnaceae
ctenolepis	Ctenolepis Benth. & Hook. f.	CTENO	Cucurbitaceae
ctenolepis	Ctenolepis cerasiformis (Stocks) Naud.	CTCE	Cucurbitaceae
Cuban copperleaf	Acalypha setosa A. Rich.	ACSE	Euphorbiaceae
Cuban nakedwood	Colubrina cubensis (Jacq.) Brongn.	COCU	Rhamnaceae
Cuban nakedwood	Colubrina cubensis (Jacq.) Brongn. var. floridana M.C. Johnston	COCUF	Rhamnaceae
Cuban raintree	Brunfelsia nitida Benth.	BRNI6	Solanaceae
Cuban swallow-wort	Cynanchum cubense (A. Rich.) Woods.	CYCU3	Asclepiadaceae
Cuban windmill grass	Chloris cubensis A.S. Hitchc. & Ekman ex A.S. Hitchc.	CHCU6	Poaceae
cuckoo flower	Cardamine pratensis L.	CAPR3	Brassicaceae
cuckoo flower	Cardamine pratensis L. var. angustifolia Hook.	CAPRA	Brassicaceae
cuckoo flower	Cardamine pratensis L. var. pratensis	CAPRP	Brassicaceae
cuckoo pint	Arum maculatum L.	ARMA29	Araceae
cucumeropsis	Cucumeropsis Naudin	CUCUM2	Cucurbitaceae
cucumis	Cucumis ficifolius A. Rich.	CUFI	Cucurbitaceae
cucumis	Cucumis prophetarum L.	CUPR2	Cucurbitaceae
Cuddy Mountain onion	Allium fibrillum M.E. Jones	ALFI	Liliaceae
cudrania	Cudrania Trécul	CUDRA	Moraceae
cultivated beet	Beta procumbens C. Sm.	BEPR	Chenopodiaceae
cultivated endive	Cichorium endivia L.	CIEN	Asteraceae
cultivated garlic	Allium sativum L.	ALSA2	Liliaceae
Cuman ragweed	Ambrosia psilostachya DC.	AMPS	Asteraceae
Cumberland false rosemary	Conradina verticillata Jennison	COVE4	Lamiaceae
Cumberland pagoda-plant	Blephilia subnuda R. Simmers & Kral	BLSU	Lamiaceae
Cumberland sandreed	Calamovilfa arcuata K.E. Rogers	CAAR12	Poaceae
Cumberland sedge	Carex cumberlandensis Naczi, Kral & Bryson	CACU26	Cyperaceae
cumin	Cuminum cyminum L.	CUCY	Apiaceae
cumin	Cuminum L.	CUMIN	Apiaceae
Cuming's stickpea	Calliandra cumingii Benth.	CACU17	Fabaceae
cunila	Cunila D. Royen ex L.	CUNIL	Lamiaceae
cunjevoi	Alocasia brisbanensis (Bailey) Domin	ALBR14	Araceae
cunninghamia	Cunninghamia R. Br.	CUNNI	Cupressaceae
cup lichen	Cladonia abbreviatula G. Merr.	CLAB	Cladoniaceae
cup lichen	Cladonia amaurocraea (Florke) Schaerer	CLAM60	Cladoniaceae
cup lichen	Cladonia anitae Culb. & C. Culb.	CLAN3	Cladoniaceae
cup lichen	Cladonia apodocarpa Robbins	CLAP2	Cladoniaceae
cup lichen	Cladonia bacilliformis (Nyl.) Gluck	CLBA3	Cladoniaceae
cup lichen	Cladonia bellidiflora (Ach.) Schaerer	CLBE4	Cladoniaceae
cup lichen	Cladonia botryocarpa G. Merr.	CLBO8	Cladoniaceae
cup lichen	Cladonia botrytes (K. Hagen) Willd.	CLBO9	Cladoniaceae
cup lichen	Cladonia brevis (Sandst.) Sandst.	CLBR4	Cladoniaceae
cup lichen	Cladonia caespiticia (Pers.) Florke	CLCA8	Cladoniaceae
cup lichen	Cladonia cariosa (Ach.) Sprengel	CLCA9	Cladoniaceae
cup lichen	Cladonia carneola (Fr.) Fr.	CLCA10	Cladoniaceae
cup lichen	Cladonia cenotea (Ach.) Schaerer	CLCE2	Cladoniaceae
cup lichen	Cladonia cervicornis (Ach.) Flotow	CLCE3	Cladoniaceae
cup lichen	Cladonia cervicornis (Ach.) Flotow ssp. cervicornis	CLCEC	Cladoniaceae
cup lichen	Cladonia cervicornis (Ach.) Flotow ssp. verticillata (Hoffm.) Ahti	CLCEV60	Cladoniaceae
cup lichen	Cladonia chlorophaea (Florke ex Sommerf.) Sprengel	CLCH3	Cladoniaceae
cup lichen	Cladonia coccifera (L.) Willd.	CLCO12	Cladoniaceae
cup lichen	Cladonia coniocraea auct.	CLCO13	Cladoniaceae
cup lichen	Cladonia cornuta (L.) Hoffm.	CLCO19	Cladoniaceae
cup lichen	Cladonia cornuta (L.) Hoffm. ssp. cornuta	CLCOC3	Cladoniaceae
cup lichen	Cladonia crispata (Ach.) Flotow	CLCR5	Cladoniaceae
cup lichen	Cladonia crispata (Ach.) Flotow var. cetrariiformis (Delise) Vainio	CLCRC2	Cladoniaceae
cup lichen	Cladonia crispata (Ach.) Flotow var. crispata	CLCRC	Cladoniaceae
cup lichen	Cladonia cristatella Tuck.	CLCR2	Cladoniaceae
cup lichen	Cladonia cryptochlorophaea Asah.	CLCR3	Cladoniaceae
cup lichen	Cladonia cyanipes (Sommerf.) Nyl.	CLCY3	Cladoniaceae
cup lichen	Cladonia dactylota Tuck.	CLDA2	Cladoniaceae
cup lichen	Cladonia decorticata (Florke) Sprengel	CLDE5	Cladoniaceae
cup lichen	Cladonia didyma (Fee) Vainio	CLDI9	Cladoniaceae
cup lichen	Cladonia dimorpha S. Hammer	CLDI11	Cladoniaceae
cup lichen	Cladonia dimorphoclada Robbins	CLDI12	Cladoniaceae
cup lichen	Cladonia ecmocyna Leighton	CLEC	Cladoniaceae
cup lichen	Cladonia ecmocyna Leighton ssp. ecmocyna	CLECE	Cladoniaceae
cup lichen	Cladonia fimbriata (L.) Fr.	CLFI2	Cladoniaceae
cup lichen	Cladonia furcata (Hudson) Schrader	CLFU3	Cladoniaceae
cup lichen	Cladonia furcata (Hudson) Schrader ssp. subrangiformis (Scriba ex Sandst.) Pisut	CLFUS	Cladoniaceae
cup lichen	Cladonia glauca Florke	CLGL5	Cladoniaceae
cup lichen	Cladonia gracilis (L.) Willd.	CLGR13	Cladoniaceae
cup lichen	Cladonia gracilis (L.) Willd. ssp. gracilis	CLGRG3	Cladoniaceae
cup lichen	Cladonia gracilis (L.) Willd. ssp. turbinata (Ach.) Ahti	CLGRT2	Cladoniaceae
cup lichen	Cladonia gracilis (L.) Willd. ssp. vulnerata Ahti	CLGRV	Cladoniaceae
cup lichen	Cladonia granulans Vainio	CLGR6	Cladoniaceae
cup lichen	Cladonia homosekikaica Nuno	CLHO3	Cladoniaceae
cup lichen	Cladonia humilis (With.) J. R. Laundon	CLHU	Cladoniaceae
cup lichen	Cladonia hypoxantha Tuck.	CLHY	Cladoniaceae
cup lichen	Cladonia imbricaria Kristinsson	CLIM2	Cladoniaceae
cup lichen	Cladonia incrassata Florke	CLIN3	Cladoniaceae
cup lichen	Cladonia leporina Fr.	CLLE4	Cladoniaceae
cup lichen	Cladonia luteoalba Wheldon & A. Wilson	CLLU3	Cladoniaceae
cup lichen	Cladonia macilenta Hoffm.	CLMA11	Cladoniaceae
cup lichen	Cladonia macroceras (Delise) Hav.	CLMA12	Cladoniaceae
cup lichen	Cladonia macrophyllodes Nyl.	CLMA14	Cladoniaceae
cup lichen	Cladonia magyarica Vainio	CLMA16	Cladoniaceae
cup lichen	Cladonia mateocyatha Robbins	CLMA17	Cladoniaceae
cup lichen	Cladonia maxima (Asah.) Ahti	CLMA18	Cladoniaceae
cup lichen	Cladonia merochlorophaea Asah.	CLME3	Cladoniaceae
cup lichen	Cladonia metacorallifera Asah.	CLME60	Cladoniaceae
cup lichen	Cladonia multiformis G. Merr.	CLMU60	Cladoniaceae
cup lichen	Cladonia ochrochlora Florke	CLOC60	Cladoniaceae
cup lichen	Cladonia P. Browne	CLADO3	Cladoniaceae
cup lichen	Cladonia pachycladodes Vainio	CLPA9	Cladoniaceae
cup lichen	Cladonia perforata A. Evans	CLPE5	Cladoniaceae
cup lichen	Cladonia perlomera Kristinsson	CLPE6	Cladoniaceae
cup lichen	Cladonia peziziformis (With.) J. R. Laundon	CLPE7	Cladoniaceae
cup lichen	Cladonia phyllophora Ehrh. ex Hoffm.	CLPH60	Cladoniaceae
cup lichen	Cladonia pleurota (Florke) Schaerer	CLPL60	Cladoniaceae
cup lichen	Cladonia pocillum (Ach.) Grognot	CLPO60	Cladoniaceae
cup lichen	Cladonia polycarpia G. Merr.	CLPO5	Cladoniaceae
cup lichen	Cladonia polycarpoides Nyl.	CLPO6	Cladoniaceae
cup lichen	Cladonia prolifica Ahti & S. Hammer	CLPR2	Cladoniaceae
cup lichen	Cladonia psoromica J. P. Dey	CLPS5	Cladoniaceae
cup lichen	Cladonia pyxidata (L.) Hoffm.	CLPY60	Cladoniaceae
cup lichen	Cladonia ramulosa (With.) J. R. Laundon	CLRA2	Cladoniaceae
cup lichen	Cladonia rei Schaerer	CLRE60	Cladoniaceae
cup lichen	Cladonia santensis Tuck.	CLSA7	Cladoniaceae
cup lichen	Cladonia scabriuscula (Delise) Nyl.	CLSC60	Cladoniaceae
cup lichen	Cladonia simulata Robbins	CLSI5	Cladoniaceae
cup lichen	Cladonia sobolescens Nyl. ex Vainio	CLSO4	Cladoniaceae
cup lichen	Cladonia squamosa (Scop.) Hoffm. var. subsquamosa (Nyl. ex Leighton) Vainio	CLSQS	Cladoniaceae
cup lichen	Cladonia squamosa Hoffm.	CLSQ60	Cladoniaceae
cup lichen	Cladonia strepsilis (Ach.) Grognot	CLST6	Cladoniaceae
cup lichen	Cladonia stricta (Nyl.) Nyl.	CLST7	Cladoniaceae
cup lichen	Cladonia stricta (Nyl.) Nyl. var. uliginosa Ahti	CLSTU	Cladoniaceae
cup lichen	Cladonia subfurcata (Nyl.) Arnold	CLSU60	Cladoniaceae
cup lichen	Cladonia subradiata (Vainio) Sandst.	CLSU9	Cladoniaceae
cup lichen	Cladonia subsetacea Robbins ex A. Evans	CLSU10	Cladoniaceae
cup lichen	Cladonia subsquamosa Krempelh.	CLSU62	Cladoniaceae
cup lichen	Cladonia subulata (L.) Weber ex F. H. Wigg.	CLSU63	Cladoniaceae
cup lichen	Cladonia symphycarpa (Florke) Fr.	CLSY61	Cladoniaceae
cup lichen	Cladonia umbricola Tonsberg & Ahti	CLUM4	Cladoniaceae
cup lichen	Cladonia uncialis (L.) F. H. Wigg.	CLUN60	Cladoniaceae
cup lichen	Cladonia verruculosa (Vainio) Ahti	CLVE4	Cladoniaceae
cup orchid	Brachionidium Lindl.	BRACH4	Orchidaceae
cupania	Cupania L.	CUPAN	Sapindaceae
cupeillo	Clusia clusioides (Griseb.) D'Arcy	CLCL2	Clusiaceae
cupey de monte	Clusia minor L.	CLMI2	Clusiaceae
cupseed	Calycocarpum lyonii (Pursh) Gray	CALY2	Menispermaceae
curaciao bush	Cordia globosa (Jacq.) Kunth	COGL6	Boraginaceae
curaciao bush	Cordia globosa (Jacq.) Kunth var. globosa (Jacq.) Kunth [excluded]	COGLG2	Boraginaceae
curculigo	Curculigo Gaertn.	CURCU2	Liliaceae
curcuma	Curcuma aromatica Salisb.	CUAR3	Zingiberaceae
curcuma	Curcuma L.	CURCU	Zingiberaceae
curl-leaf mountain mahogany	Cercocarpus ledifolius Nutt.	CELE3	Rosaceae
curl-leaf mountain mahogany	Cercocarpus ledifolius Nutt. var. intercedens Schneid.	CELEI	Rosaceae
curl-leaf mountain mahogany	Cercocarpus ledifolius Nutt. var. ledifolius	CELEL	Rosaceae
curly Mitchell grass	Astrebla lappacea (Lindl.) Domin [excluded]	ASLA22	Poaceae
curly plumeless thistle	Carduus crispus L.	CACR2	Asteraceae
curly sedge	Carex rupestris All.	CARU3	Cyperaceae
curly sedge	Carex rupestris All. var. rupestris	CARUR	Cyperaceae
curly threeawn	Aristida desmantha Trin. & Rupr.	ARDE3	Poaceae
curlyheads	Clematis ochroleuca Ait.	CLOC	Ranunculaceae
currant milkvetch	Astragalus uncialis Barneby	ASUN3	Fabaceae
Curtis' disc lichen	Buellia curtisii (Tuck.) Imshaug	BUCU4	Physciaceae
Curtis' threeawn	Aristida dichotoma Michx. var. curtissii Gray ex S. Wats. & Coult.	ARDIC	Poaceae
Curtiss' milkweed	Asclepias curtissii Gray	ASCU8	Asclepiadaceae
curved sedge	Carex maritima Gunn.	CAMA14	Cyperaceae
curvenut cryptantha	Cryptantha recurvata Coville	CRRE5	Boraginaceae
curvepod fumewort	Corydalis curvisiliqua Engelm.	COCU2	Fumariaceae
curvepod fumewort	Corydalis curvisiliqua Engelm. ssp. curvisiliqua	COCUC	Fumariaceae
curvepod fumewort	Corydalis curvisiliqua Engelm. ssp. grandibracteata (Fedde) G.B. Ownbey	COCUG2	Fumariaceae
curvepod fumewort	Corydalis curvisiliqua Engelm. ssp. occidentalis (Engelm. ex Gray) W.A. Weber	COCUO	Fumariaceae
curvepod milkvetch	Astragalus curvicarpus (Heller) J.F. Macbr.	ASCU4	Fabaceae
curvepod milkvetch	Astragalus curvicarpus (Heller) J.F. Macbr. var. brachycodon (Barneby) Barneby	ASCUB	Fabaceae
curvepod milkvetch	Astragalus curvicarpus (Heller) J.F. Macbr. var. curvicarpus	ASCUC	Fabaceae
curveseed butterwort	Ceratocephala Moench	CERAT3	Ranunculaceae
curveseed butterwort	Ceratocephala testiculata (Crantz) Bess.	CETE5	Ranunculaceae
cushenbury milkvetch	Astragalus albens Greene	ASAL4	Fabaceae
cushion cryptantha	Cryptantha circumscissa (Hook. & Arn.) I.M. Johnston	CRCI2	Boraginaceae
cushion cryptantha	Cryptantha circumscissa (Hook. & Arn.) I.M. Johnston var. circumscissa	CRCIC2	Boraginaceae
cushion cryptantha	Cryptantha circumscissa (Hook. & Arn.) I.M. Johnston var. hispida (J.F. Macbr.) I.M. Johnston	CRCIH	Boraginaceae
cushion cryptantha	Cryptantha circumscissa (Hook. & Arn.) I.M. Johnston var. rosulata J.T. Howell	CRCIR	Boraginaceae
cushion milkvetch	Astragalus aretioides (M.E. Jones) Barneby	ASAR3	Fabaceae
cusickiella	Cusickiella Rollins	CUSIC	Brassicaceae
Cusick's camas	Camassia cusickii S. Wats.	CACU2	Liliaceae
Cusick's fumewort	Corydalis caseana Gray ssp. cusickii (S. Wats.) G.B. Ownbey	COCAC	Fumariaceae
Cusick's giant hyssop	Agastache cusickii (Greenm.) Heller	AGCU	Lamiaceae
Cusick's hawksbeard	Crepis bakeri Greene ssp. cusickii (Eastw.) Babcock & Stebbins	CRBAC	Asteraceae
Cusick's Indian paintbrush	Castilleja cusickii Greenm.	CACU7	Scrophulariaceae
Cusick's milkvetch	Astragalus cusickii Gray	ASCU5	Fabaceae
Cusick's milkvetch	Astragalus cusickii Gray var. cusickii	ASCUC2	Fabaceae
Cusick's milkvetch	Astragalus cusickii Gray var. flexilipes Barneby	ASCUF	Fabaceae
Cusick's pincushion	Chaenactis cusickii Gray	CHCU	Asteraceae
Cusick's rockcress	Arabis cusickii S. Wats.	ARCU	Brassicaceae
Cusick's sedge	Carex cusickii Mackenzie ex Piper & Beattie	CACU5	Cyperaceae
Cusick's serviceberry	Amelanchier alnifolia (Nutt.) Nutt. ex M. Roemer var. cusickii (Fern.) C.L. Hitchc.	AMALC	Rosaceae
cusp dodder	Cuscuta cuspidata Engelm.	CUCU2	Cuscutaceae
custard apple	Annona reticulata L.	ANRE	Annonaceae
Custer milkvetch	Astragalus amnis-amissi Barneby ex C.L. Hitchc.	ASAM4	Fabaceae
Cuthbert's turtlehead	Chelone cuthbertii Small	CHCU5	Scrophulariaceae
cutleaf balsamroot	Balsamorhiza macrophylla Nutt.	BAMA4	Asteraceae
cutleaf cyclanthera	Cyclanthera dissecta (Torr. & Gray) Arn.	CYDI	Cucurbitaceae
cutleaf false oxtongue	Blumea laciniata (Roxb.) DC.	BLLA	Asteraceae
cutleaf goosefoot	Chenopodium multifidum L.	CHMU	Chenopodiaceae
cutleaf grapefern	Botrychium dissectum Spreng.	BODI2	Ophioglossaceae
cutleaf Indian paintbrush	Castilleja lacera (Benth.) Chuang & Heckard	CALA68	Scrophulariaceae
cutleaf spleenwort	Asplenium abscissum Willd.	ASAB2	Aspleniaceae
cutleaf toothwort	Cardamine concatenata (Michx.) Sw.	CACO26	Brassicaceae
cutleaf waterparsnip	Berula erecta (Huds.) Coville	BEER	Apiaceae
Cutler's milkvetch	Astragalus preussii Gray var. cutleri Barneby	ASPRC2	Fabaceae
Cutler's milkweed	Asclepias cutleri Woods.	ASCU9	Asclepiadaceae
Cuyamaca cypress	Cupressus arizonica Greene ssp. stephensonii (C.B. Wolf) Beauchamp	CUARS2	Cupressaceae
Cuyamaca rockcress	Arabis hirshbergiae S. Boyd	ARHI9	Brassicaceae
cyamopsis	Cyamopsis DC.	CYAMO	Fabaceae
cyanea	Cyanea Gaud.	CYANE	Campanulaceae
cyanic milkvetch	Astragalus cyaneus Gray	ASCY	Fabaceae
cyathula	Cyathula Blume	CYATH2	Amaranthaceae
cybianthus	Cybianthus Mart.	CYBIA	Myrsinaceae
cycad	Cycas L.	CYCAS	Cycadaceae
cyclamen	Cyclamen L.	CYCLA3	Primulaceae
cyclamen	Cyclamen purpurascens Miller	CYPU9	Primulaceae
cyclanthera	Cyclanthera pedata (L.) Schrader	CYPE11	Cucurbitaceae
cyclanthera	Cyclanthera pedata (L.) Schrader var. pedata	CYPEP2	Cucurbitaceae
cyclanthera	Cyclanthera Schrad.	CYCLA2	Cucurbitaceae
cyclodictyon moss	Cyclodictyon Mitt.	CYCLO3	Callicostaceae
cyclodictyon moss	Cyclodictyon varians (Sull.) Kuntze	CYVA4	Callicostaceae
cycloloma	Cycloloma Moq.	CYCLO	Chenopodiaceae
cyclopeltis	Cyclopeltis J. Sm.	CYCLO2	Dryopteridaceae
cyclops acacia	Acacia cyclops A. Cunningham ex G. Don	ACCY2	Fabaceae
cycnium	Cycnium E. Mey.ex Benth.	CYCNI	Scrophulariaceae
cydonia	Cydonia P. Mill.	CYDON	Rosaceae
cylinder cup lichen	Cladonia cylindrica (A. Evans) A. Evans	CLCY4	Cladoniaceae
cylinder jointtail grass	Coelorachis cylindrica (Michx.) Nash	COCY	Poaceae
cylindrical atrichum moss	Atrichum cylindricum (Willd. in Web.) G. L. Sm.	ATCY	Polytrichaceae
cymbalaria	Cymbalaria Hill	CYMBA	Scrophulariaceae
cymbidium	Cymbidium Sw.	CYMBI	Orchidaceae
cymbocarpa	Cymbocarpa Miers	CYMBO2	Burmanniaceae
cymbopogon grass	Cymbopogon winterianus Jowitt	CYWI6	Poaceae
cymodocea	Cymodocea Koenig	CYMOD	Cymodoceaceae
cymodocea	Cymodocea rotundata Ehrenb. & Hempr. ex Aschers.	CYRO9	Cymodoceaceae
cymodocea	Cymodocea serrulata (R. Br.) Aschers. & Magnus	CYSE10	Cymodoceaceae
cymophora	Cymophora accedens (S.F. Blake) B.L. Turner & A. Powell	CYAC7	Asteraceae
cymophora	Cymophora B.L. Robins.	CYMOP3	Asteraceae
cymophyllus	Cymophyllus Mackenzie ex Britt.	CYMOP	Cyperaceae
cynara	Cynara L.	CYNAR	Asteraceae
cynodon	Cynodon bradleyi Stent	CYBR14	Poaceae
cynodontium moss	Cynodontium alpestre (Wahlenb.) Milde	CYAL5	Dicranaceae
cynodontium moss	Cynodontium Bruch & Schimp. ex Schimp.	CYNOD3	Dicranaceae
cynodontium moss	Cynodontium glaucescens (Lindb. & Arnell) Par.	CYGL6	Dicranaceae
cynodontium moss	Cynodontium gracilescens (Web. & Mohr) Schimp.	CYGR15	Dicranaceae
cynodontium moss	Cynodontium polycarpon (Hedw.) Schimp.	CYPO8	Dicranaceae
cynodontium moss	Cynodontium strumiferum (Hedw.) Lindb.	CYST70	Dicranaceae
cynodontium moss	Cynodontium strumulosum C. Müll. & Kindb. in Mac. & Kindb.	CYST6	Dicranaceae
cynodontium moss	Cynodontium tenellum (Bruch & Schimp. in B.S.G.) Limpr.	CYTE13	Dicranaceae
cynometra	Cynometra L.	CYNOM	Fabaceae
cynometra	Cynometra ramiflora L.	CYRA8	Fabaceae
cynosciadium	Cynosciadium DC.	CYNOS	Apiaceae
cyphomandra	Cyphomandra C. Martius ex Sendtner	CYPHO3	Solanaceae
cyphomeris	Cyphomeris Standl.	CYPHO	Nyctaginaceae
cypress	Cupressus L.	CUPRE	Cupressaceae
cypress swamp sedge	Carex joorii Bailey	CAJO2	Cyperaceae
cypress-knee helmet orchid	Cranichis muscosa Sw.	CRMU3	Orchidaceae
cypressknee sedge	Carex decomposita Muhl.	CADE6	Cyperaceae
cypresslike sedge	Carex pseudocyperus L.	CAPS	Cyperaceae
cypress-pine	Callitris Vent.	CALLI7	Cupressaceae
cypselea	Cypselea Turp.	CYPSE	Aizoaceae
cyrtandra	Cyrtandra J.R. & G. Forst.	CYRTA	Gesneriaceae

Source: U. S. Department of Agriculture

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