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Plant List
Indexed Alphabetically by Common Name
F-G
For a list of plants indexed by Scientific Name, click here
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| National Common Name | Scientific Name with Author | Symbol | Family | |
| Fahkahatchee bluethread | Burmannia flava Mart. | BUFL2 | Burmanniaceae | |
| Fairbanks annual Indian paintbrush | Castilleja annua Pennell | CAAN8 | Scrophulariaceae | |
| Fairfield milkvetch | Astragalus atratus S. Wats. var. inseptus Barneby | ASATI | Fabaceae | |
| fairy bentspur orchid | Campylocentrum micranthum (Lindl.) Maury | CAMI26 | Orchidaceae | |
| fairy fans | Clarkia breweri (Gray) Greene | CLBR | Onagraceae | |
| fairy slipper | Calypso bulbosa (L.) Oakes | CABU | Orchidaceae | |
| fairy slipper | Calypso bulbosa (L.) Oakes var. americana (R. Br. ex Ait. f.) Luer | CABUA | Orchidaceae | |
| fairy slipper | Calypso bulbosa (L.) Oakes var. occidentalis (Holz.) Boivin | CABUO | Orchidaceae | |
| fairy slipper | Calypso Salisb. | CALYP | Orchidaceae | |
| fairyduster | Calliandra eriophylla Benth. | CAER | Fabaceae | |
| fairyswords | Cheilanthes lindheimeri Hook. | CHLI | Pteridaceae | |
| fairywand | Chamaelirium luteum (L.) Gray | CHLU | Liliaceae | |
| false agoseris | Agoseris glauca (Pursh) Raf. var. laciniata (D.C. Eat.) Smiley | AGGLL | Asteraceae | |
| false beardgrass | Chrysopogon Trin. | CHRYS6 | Poaceae | |
| false bindweed | Calystegia R. Br. | CALYS | Convolvulaceae | |
| false boneset | Brickellia eupatorioides (L.) Shinners | BREU | Asteraceae | |
| false boneset | Brickellia eupatorioides (L.) Shinners var. chlorolepis (Woot. & Standl.) B.L. Turner | BREUC2 | Asteraceae | |
| false boneset | Brickellia eupatorioides (L.) Shinners var. corymbulosa (Torr. & Gray) Shinners | BREUC | Asteraceae | |
| false boneset | Brickellia eupatorioides (L.) Shinners var. eupatorioides | BREUE | Asteraceae | |
| false boneset | Brickellia eupatorioides (L.) Shinners var. floridana (R.W. Long) B.L. Turner | BREUF | Asteraceae | |
| false boneset | Brickellia eupatorioides (L.) Shinners var. gracillima (Gray) B.L. Turner | BREUG | Asteraceae | |
| false boneset | Brickellia eupatorioides (L.) Shinners var. texana (Shinners) Shinners | BREUT | Asteraceae | |
| false brome | Brachypodium Beauv. | BRACH3 | Poaceae | |
| false chaff flower | Chamissoa altissima (Jacq.) Kunth | CHAL10 | Amaranthaceae | |
| false chiggergrape | Coccoloba venosa L. | COVE | Polygonaceae | |
| false cloak fern | Argyrochosma (Sm.) Windham | ARGYR5 | Pteridaceae | |
| false coolwort | Bolandra Gray | BOLAN | Saxifragaceae | |
| false cottonseed | Bombycilaena californica (Fisch. & C.A. Mey.) Holub | BOCA8 | Asteraceae | |
| false croton | Caperonia St.-Hil. | CAPER | Euphorbiaceae | |
| false daisyleaf moonwort | Botrychium pseudopinnatum W.H. Wagner | BOPS | Ophioglossaceae | |
| false Evans' reindeer lichen | Cladina pseudoevansii (Asah.) Hale & Culb. | CLPS3 | Cladoniaceae | |
| false fanpetals | Billieturnera Fryxell | BILLI | Malvaceae | |
| false flax | Camelina Crantz | CAMEL | Brassicaceae | |
| false foxglove | Agalinis Raf. | AGALI | Scrophulariaceae | |
| false foxglove | Aureolaria Raf. | AUREO | Scrophulariaceae | |
| false gilyflower | Allophyllum (Nutt.) A.& V. Grant | ALLOP2 | Polemoniaceae | |
| false goat's beard | Astilbe Buch.-Ham. ex D. Don | ASTIL | Saxifragaceae | |
| false grama | Cathestecum erectum Vasey & Hack. | CAER2 | Poaceae | |
| false grama | Cathestecum J. Presl | CATHE | Poaceae | |
| false hair sedge | Carex bulbostylis Mackenzie | CABU4 | Cyperaceae | |
| false heather | Cuphea hyssopifolia Kunth | CUHY | Lythraceae | |
| false hollyfern | Arachniodes chaerophylloides (Poir.) Proctor | ARCH10 | Dryopteridaceae | |
| false hop sedge | Carex lupuliformis Sartwell ex Dewey | CALU3 | Cyperaceae | |
| false Indianmallow | Allowissadula Bates | ALLOW | Malvaceae | |
| false indigo | Amorpha L. | AMORP | Fabaceae | |
| false madwort | Berteroa DC. | BERTE | Brassicaceae | |
| false neststraw | Ancistrocarphus filagineus Gray | ANFI3 | Asteraceae | |
| false nettle | Boehmeria Jacq. | BOEHM | Urticaceae | |
| false oxtongue | Blumea DC. | BLUME | Asteraceae | |
| false pak choi | Brassica parachinensis L. H. Bailey | BRPA13 | Brassicaceae | |
| false Philippine violet | Barleriola solanifolia (L.) Oerst. ex Lindau | BASO | Acanthaceae | |
| false rosemary | Conradina canescens Gray | COCA19 | Lamiaceae | |
| false rosemary | Conradina Gray | CONRA | Lamiaceae | |
| false sesame | Ceratotheca sesamoides Endl. | CESE9 | Pedaliaceae | |
| false sisal | Agave decipiens Baker | AGDE3 | Agavaceae | |
| false tick trefoil | Codariocalyx gyroides (Roxb. ex Link) Hassk. | COGY | Fabaceae | |
| false waterwillow | Andrographis echioides (L.) Nees | ANEC | Acanthaceae | |
| false waterwillow | Andrographis Wallich ex Nees | ANDRO5 | Acanthaceae | |
| falseteeth | Capparis flexuosa (L.) L. | CAFL2 | Capparaceae | |
| fan columbine | Aquilegia flabellata Siebold & Zucc. | AQFL2 | Ranunculaceae | |
| fan maidenhair | Adiantum tenerum Sw. | ADTE | Pteridaceae | |
| fan palm | Chamaerops L. | CHAMA19 | Arecaceae | |
| fanleaf hawthorn | Crataegus flabellata (Spach) Kirchn. | CRFL | Rosaceae | |
| fanshape orchid | Cochleanthes flabelliformis (Sw.) R.E. Schultes & Garay | COFL4 | Orchidaceae | |
| fanwort | Cabomba Aubl. | CABOM | Cabombaceae | |
| farewell to spring | Clarkia amoena (Lehm.) A. Nels. & J.F. Macbr. | CLAM | Onagraceae | |
| farewell to spring | Clarkia amoena (Lehm.) A. Nels. & J.F. Macbr. ssp. amoena | CLAMA | Onagraceae | |
| farewell to spring | Clarkia amoena (Lehm.) A. Nels. & J.F. Macbr. ssp. caurina (Abrams ex Piper) H.F. & M.E. Lewis | CLAMC | Onagraceae | |
| farewell to spring | Clarkia amoena (Lehm.) A. Nels. & J.F. Macbr. ssp. huntiana (Jepson) H.F. & M.E. Lewis | CLAMH | Onagraceae | |
| farinose cup lichen | Cladonia farinacea (Vainio) A. Evans | CLFA3 | Cladoniaceae | |
| Fassett's water-starwort | Callitriche fassettii Schotsman | CAFA3 | Callitrichaceae | |
| fatpork | Chione venosa (Sw.) Urban | CHVE4 | Rubiaceae | |
| Faurie's club | Cheirodendron fauriei Hochr. | CHFA | Araliaceae | |
| Faurie's cyanea | Cyanea fauriei Levl. | CYFA5 | Campanulaceae | |
| faux persil | Cardiospermum corindum L. | CACO31 | Sapindaceae | |
| feather fingergrass | Chloris virgata Sw. | CHVI4 | Poaceae | |
| feather reed grass | Calamagrostis ×acutiflora (Schrad.) Rchb. | CAAC19 | Poaceae | |
| feathered mosquitofern | Azolla pinnata R. Br. | AZPI | Azollaceae | |
| feather-head knapweed | Centaurea trichocephala Bieb. ex Willd. | CETR12 | Asteraceae | |
| featherleaf desertpeony | Acourtia runcinata (Lag. ex D. Don) B.L. Turner | ACRU3 | Asteraceae | |
| featherleaf springparsley | Cymopterus beckii Welsh & Goodrich | CYBE2 | Apiaceae | |
| fecund jelly lichen | Collema fecundum Degel. | COFE4 | Collemataceae | |
| feefee | Centrosema plumieri (Turp. ex Pers.) Benth. | CEPL | Fabaceae | |
| Fee's spleenwort | Asplenium feei Kunze ex Fée | ASFE3 | Aspleniaceae | |
| Felix anemone | Anemone oregana Gray var. felix (M.E. Peck) C.L. Hitchc. | ANORF | Ranunculaceae | |
| feltleaf bluestar | Amsonia tharpii Woods. | AMTH | Apocynaceae | |
| feltleaf ceanothus | Ceanothus arboreus Greene | CEAR | Rhamnaceae | |
| Fendler threeawn | Aristida purpurea Nutt. var. longiseta (Steud.) Vasey | ARPUL | Poaceae | |
| Fendler's brachythecium moss | Brachythecium fendleri (Sull.) Jaeg. | BRFE4 | Brachytheciaceae | |
| Fendler's brickellbush | Brickelliastrum fendleri (Gray) King & H.E. Robins. | BRFE2 | Asteraceae | |
| Fendler's ceanothus | Ceanothus fendleri Gray | CEFE | Rhamnaceae | |
| Fendler's false cloak fern | Argyrochosma fendleri (Kunze) Windham | ARFE5 | Pteridaceae | |
| Fendler's flatsedge | Cyperus fendlerianus Boeckl. | CYFE2 | Cyperaceae | |
| Fendler's lipfern | Cheilanthes fendleri Hook. | CHFE2 | Pteridaceae | |
| Fendler's rockcress | Arabis fendleri (S. Wats.) Greene | ARFE | Brassicaceae | |
| Fendler's rockcress | Arabis fendleri (S. Wats.) Greene var. fendleri | ARFEF | Brassicaceae | |
| Fendler's sandmat | Chamaesyce fendleri (Torr. & Gray) Small | CHFE3 | Euphorbiaceae | |
| Fendler's sandwort | Arenaria fendleri Gray | ARFE3 | Caryophyllaceae | |
| Fendler's sandwort | Arenaria fendleri Gray var. brevifolia (Maguire) Maguire | ARFEB | Caryophyllaceae | |
| Fendler's sandwort | Arenaria fendleri Gray var. fendleri | ARFEF3 | Caryophyllaceae | |
| Fendler's springparsley | Cymopterus acaulis (Pursh) Raf. var. fendleri (Gray) Goodrich | CYACF | Apiaceae | |
| Fendler's threeawn | Aristida purpurea Nutt. var. fendleriana (Steud.) Vasey | ARPUF | Poaceae | |
| Ferchel's bryum moss | Bryum capillare Hedw. var. ferchelii (Brid.) Bruch & Schimp. in B.S.G. | BRCAF | Bryaceae | |
| fern flatsedge | Cyperus filicinus Vahl | CYFI | Cyperaceae | |
| Fernald's sedge | Carex merritt-fernaldii Mackenzie | CAME12 | Cyperaceae | |
| ferngrass | Catapodium rigidum (L.) C.E. Hubbard ex Dony | CARI2 | Poaceae | |
| fern-leaf acacia | Acacia pennatula (Schltdl. & Cham.) Benth. | ACPE9 | Fabaceae | |
| fernleaf goldthread | Coptis aspleniifolia Salisb. | COAS | Ranunculaceae | |
| fernleaf yarrow | Achillea filipendulina Lam. | ACFI | Asteraceae | |
| fernleaf yellow false foxglove | Aureolaria pedicularia (L.) Raf. | AUPE2 | Scrophulariaceae | |
| fernleaf yellow false foxglove | Aureolaria pedicularia (L.) Raf. var. ambigens (Fern.) Farw. | AUPEA | Scrophulariaceae | |
| fernleaf yellow false foxglove | Aureolaria pedicularia (L.) Raf. var. austromontana Pennell | AUPEA2 | Scrophulariaceae | |
| fernleaf yellow false foxglove | Aureolaria pedicularia (L.) Raf. var. intercedens Pennell | AUPEI | Scrophulariaceae | |
| fernleaf yellow false foxglove | Aureolaria pedicularia (L.) Raf. var. pedicularia | AUPEP | Scrophulariaceae | |
| Ferris' milkvetch | Astragalus tener Gray var. ferrisiae A. Liston | ASTEF | Fabaceae | |
| Ferris' sandwort | Arenaria macradenia S. Wats. ssp. ferrisiae Abrams | ARMAF | Caryophyllaceae | |
| Ferron's milkvetch | Astragalus musiniensis M.E. Jones | ASMU3 | Fabaceae | |
| ferruginous clerodendrum | Clerodendrum trichotomum Thunb. var. ferrugineum Nakai | CLTRF | Verbenaceae | |
| fescue sandwort | Arenaria capillaris Poir. ssp. americana Maguire | ARCAA | Caryophyllaceae | |
| fescue sedge | Carex festucacea Schkuhr ex Willd. | CAFE3 | Cyperaceae | |
| fetid goosefoot | Chenopodium graveolens Willd. | CHGR2 | Chenopodiaceae | |
| fevertree | Acacia xanthophloea Benth. | ACXA3 | Fabaceae | |
| fewflower beggarticks | Bidens leptocephala Sherff | BILE | Asteraceae | |
| fewflower evening-primrose | Camissonia breviflora (Torr. & Gray) Raven | CABR22 | Onagraceae | |
| fewflower fumewort | Corydalis pauciflora (Steph.) Pers. | COPA11 | Fumariaceae | |
| fewflower hairsedge | Bulbostylis pauciflora (Liebm.) C.B. Clarke | BUPA | Cyperaceae | |
| fewflower holdback | Caesalpinia pauciflora (Griseb.) C. Wright ex Sauvalle | CAPA34 | Fabaceae | |
| fewflower milkweed | Asclepias lanceolata Walt. | ASLA2 | Asclepiadaceae | |
| fewflower sedge | Carex pauciflora Lightf. | CAPA19 | Cyperaceae | |
| fewleaf spiderflower | Cleome sparsifolia S. Wats. | CLSP2 | Capparaceae | |
| fewleaf thistle | Cirsium remotifolium (Hook.) DC. | CIRE | Asteraceae | |
| fewseed sedge | Carex oligosperma Michx. | CAOL3 | Cyperaceae | |
| fewseed sedge | Carex oligosperma Michx. var. oligosperma | CAOLO3 | Cyperaceae | |
| fewseeded bog sedge | Carex microglochin Wahlenb. | CAMI6 | Cyperaceae | |
| fibrousroot sedge | Carex communis Bailey | CACO7 | Cyperaceae | |
| fibrousroot sedge | Carex communis Bailey var. communis | CACOC4 | Cyperaceae | |
| fiddleleaf hawksbeard | Crepis runcinata (James) Torr. & Gray | CRRU3 | Asteraceae | |
| fiddleleaf hawksbeard | Crepis runcinata (James) Torr. & Gray ssp. glauca (Nutt.) Babcock & Stebbins | CRRUG | Asteraceae | |
| fiddleleaf hawksbeard | Crepis runcinata (James) Torr. & Gray ssp. hispidulosa (T.J. Howell ex Rydb.) Babcock & Stebbins | CRRUH2 | Asteraceae | |
| fiddleleaf hawksbeard | Crepis runcinata (James) Torr. & Gray ssp. imbricata Babcock & Stebbins | CRRUI | Asteraceae | |
| fiddleleaf hawksbeard | Crepis runcinata (James) Torr. & Gray ssp. runcinata | CRRUR | Asteraceae | |
| fiddleneck | Amsinckia Lehm. | AMSIN | Boraginaceae | |
| fiddlewood | Citharexylum L. | CITHA | Verbenaceae | |
| field anoda | Anoda pentaschista Gray | ANPE4 | Malvaceae | |
| field bindweed | Convolvulus arvensis L. | COAR4 | Convolvulaceae | |
| field brome | Bromus arvensis L. | BRAR5 | Poaceae | |
| field chickweed | Cerastium arvense L. | CEAR4 | Caryophyllaceae | |
| field chickweed | Cerastium arvense L. ssp. arvense | CEARA2 | Caryophyllaceae | |
| field chickweed | Cerastium arvense L. ssp. fuegianum (Hook. f.) Ugborogho | CEARF | Caryophyllaceae | |
| field chickweed | Cerastium arvense L. ssp. maximum (Hollick & Britt.) Ugborogho | CEARM | Caryophyllaceae | |
| field chickweed | Cerastium arvense L. ssp. strictum (L.) Ugborogho | CEARS2 | Caryophyllaceae | |
| field chickweed | Cerastium arvense L. ssp. velutinum (Raf.) Ugborogho | CEARV2 | Caryophyllaceae | |
| field chickweed | Cerastium arvense L. ssp. velutinum (Raf.) Ugborogho var. velutinum (Raf.) Britt. | CEARV3 | Caryophyllaceae | |
| field chickweed | Cerastium arvense L. ssp. velutinum (Raf.) Ugborogho var. villosum (Muhl. ex Darl.) Hollick & Britt. | CEARV4 | Caryophyllaceae | |
| field copperleaf | Acalypha aristata Kunth | ACAR17 | Euphorbiaceae | |
| field garlic | Allium oleraceum L. | ALOL | Liliaceae | |
| field Indian paintbrush | Castilleja arvensis Cham. & Schlecht. | CAAR21 | Scrophulariaceae | |
| field marigold | Calendula arvensis L. | CAAR | Asteraceae | |
| field mustard | Brassica rapa L. | BRRA | Brassicaceae | |
| field mustard | Brassica rapa L. var. amplexicaulis Tanaka & Ono | BRRAA | Brassicaceae | |
| field mustard | Brassica rapa L. var. rapa | BRRAR | Brassicaceae | |
| field parsley piert | Aphanes arvensis L. | APAR2 | Rosaceae | |
| field pumpkin | Cucurbita pepo L. | CUPE | Cucurbitaceae | |
| field pumpkin | Cucurbita pepo L. var. ovifera (L.) Harz | CUPEO | Cucurbitaceae | |
| field pumpkin | Cucurbita pepo L. var. pepo | CUPEP | Cucurbitaceae | |
| field pussytoes | Antennaria neglecta Greene | ANNE | Asteraceae | |
| field sagewort | Artemisia campestris L. | ARCA12 | Asteraceae | |
| field sagewort | Artemisia campestris L. ssp. borealis (Pallas) Hall & Clements | ARCAB2 | Asteraceae | |
| field sagewort | Artemisia campestris L. ssp. borealis (Pallas) Hall & Clements var. borealis (Pallas) M.E. Peck | ARCAB4 | Asteraceae | |
| field sagewort | Artemisia campestris L. ssp. borealis (Pallas) Hall & Clements var. petiolata Welsh | ARCAP4 | Asteraceae | |
| field sagewort | Artemisia campestris L. ssp. borealis (Pallas) Hall & Clements var. scouleriana (Hook.) Cronq. | ARCAS5 | Asteraceae | |
| field sagewort | Artemisia campestris L. ssp. borealis (Pallas) Hall & Clements var. wormskioldii (Bess. ex Hook.) Cronq. | ARCAW | Asteraceae | |
| field sagewort | Artemisia campestris L. ssp. campestris L. [excluded] | ARCAC13 | Asteraceae | |
| field sagewort | Artemisia campestris L. ssp. caudata (Michx.) Hall & Clements | ARCAC | Asteraceae | |
| field thistle | Cirsium discolor (Muhl. ex Willd.) Spreng. | CIDI | Asteraceae | |
| fierce Spaniard | Aciphylla ferox W.R.B. Oliv. | ACFE2 | Apiaceae | |
| fierce Spaniard | Aciphylla J.R. Forst. & G. Forst. | ACIPH | Apiaceae | |
| figleaf goosefoot | Chenopodium ficifolium Sm. | CHFI4 | Chenopodiaceae | |
| figleaf gourd | Cucurbita ficifolia Bouché | CUFI2 | Cucurbitaceae | |
| filiform anomobryum moss | Anomobryum filiforme (Dicks.) Solms in Rabenh. | ANFI4 | Bryaceae | |
| filiform cryphaea moss | Cryphaea filiformis (Hedw.) Brid. | CRFI4 | Cryphaeaceae | |
| filiform rockjasmine | Androsace filiformis Retz. | ANFI | Primulaceae | |
| filmy angelica | Angelica triquinata Michx. | ANTR2 | Apiaceae | |
| filmy kihifern | Adenophorus hymenophylloides (Kaulfuss) Hook. & Grev. | ADHY | Grammitidaceae | |
| finger cup lichen | Cladonia digitata (L.) Hoffm. | CLDI10 | Cladoniaceae | |
| finger dogshade | Cynosciadium digitatum DC. | CYDI2 | Apiaceae | |
| finger flatsedge | Cyperus digitatus Roxb. | CYDI5 | Cyperaceae | |
| finger rot | Cnidoscolus urens (L.) Arthur var. stimulosus (Michx.) Govaerts | CNURS | Euphorbiaceae | |
| fingerleaf gourd | Cucurbita digitata Gray | CUDI | Cucurbitaceae | |
| fir | Abies P. Mill. | ABIES | Pinaceae | |
| fir dwarf mistletoe | Arceuthobium abietinum Engelm. ex Munz | ARAB4 | Viscaceae | |
| fire reedgrass | Calamagrostis koelerioides Vasey | CAKO | Poaceae | |
| fire vine | Combretum paniculatum Vent. | COPA41 | Combretaceae | |
| fireberry hawthorn | Crataegus chrysocarpa Ashe | CRCH | Rosaceae | |
| fireberry hawthorn | Crataegus chrysocarpa Ashe var. chrysocarpa | CRCHC2 | Rosaceae | |
| firebush | Croton lucidus L. | CRLU2 | Euphorbiaceae | |
| firecrackerbush | Bouvardia ternifolia (Cav.) Schlecht. | BOTE2 | Rubiaceae | |
| firethread sedge | Carex scopulorum Holm var. prionophylla (Holm) L.A. Standley | CASCP | Cyperaceae | |
| fireweed | Chamerion angustifolium (L.) Holub | CHAN9 | Onagraceae | |
| fireweed | Chamerion angustifolium (L.) Holub ssp. angustifolium | CHANA2 | Onagraceae | |
| fireweed | Chamerion angustifolium (L.) Holub ssp. circumvagum (Mosquin) Hoch | CHANC | Onagraceae | |
| fireweed | Chamerion Raf. ex Holub | CHAME2 | Onagraceae | |
| Fischer monkshood | Aconitum fischeri Reichb. | ACFI3 | Ranunculaceae | |
| Fischer's chickweed | Cerastium fischerianum Ser. | CEFI | Caryophyllaceae | |
| Fish Lake thistle | Cirsium clavatum (M.E. Jones) Petrak | CICL | Asteraceae | |
| Fish Slough milkvetch | Astragalus lentiginosus Dougl. ex Hook. var. piscinensis Barneby | ASLEP3 | Fabaceae | |
| Fisher milkvetch | Astragalus piscator Barneby & Welsh | ASPI6 | Fabaceae | |
| fishgrass | Cabomba haynesii Wiersema | CAHA26 | Cabombaceae | |
| Fishlock's croton | Croton fishlockii Britt. | CRFI3 | Euphorbiaceae | |
| fishtail palm | Caryota L. | CARYO | Arecaceae | |
| fissure dot lichen | Arthonia fissurina Nyl. | ARFI6 | Arthoniaceae | |
| five eyes | Chamaesaracha (Gray) Benth. | CHAMA8 | Solanaceae | |
| fiveangled dodder | Cuscuta pentagona Engelm. | CUPE3 | Cuscutaceae | |
| fiveangled dodder | Cuscuta pentagona Engelm. var. pentagona | CUPEP2 | Cuscutaceae | |
| fivehorn smotherweed | Bassia hyssopifolia (Pallas) Kuntz | BAHY | Chenopodiaceae | |
| fivelobe cucumber | Cayaponia quinqueloba (Raf.) Shinners | CAQU3 | Cucurbitaceae | |
| fivestamen chickweed | Cerastium semidecandrum L. | CESE4 | Caryophyllaceae | |
| fivetooth spineflower | Chorizanthe watsonii Torr. & Gray | CHWA2 | Polygonaceae | |
| fivewing spiderling | Boerhavia intermedia M.E. Jones | BOIN | Nyctaginaceae | |
| flaccid brachythecium moss | Brachythecium salebrosum (Web. & Mohr) Schimp. in B.S.G. var. flaccidum Schimp. in B.S.G. | BRSAF | Brachytheciaceae | |
| Flagstaff rockcress | Arabis gracilipes Greene | ARGR4 | Brassicaceae | |
| flame bottletree | Brachychiton acerifolius (A. Cunn. ex G. Don) Macarthur | BRAC7 | Sterculiaceae | |
| flame keeper | Combretum paniculatum Vent. ssp. microphyllum (Klotzsch) Wickens | COPAM | Combretaceae | |
| flaming trumpet | Collomia rawsoniana Greene | CORA3 | Polemoniaceae | |
| flamingo-lily | Anthurium andraeanum Linden | ANAN15 | Araceae | |
| flatbud pricklypoppy | Argemone munita Dur. & Hilg. | ARMU | Papaveraceae | |
| flatbud pricklypoppy | Argemone munita Dur. & Hilg. ssp. argentea G.B. Ownbey | ARMUA | Papaveraceae | |
| flatbud pricklypoppy | Argemone munita Dur. & Hilg. ssp. munita | ARMUM | Papaveraceae | |
| flatbud pricklypoppy | Argemone munita Dur. & Hilg. ssp. robusta G.B. Ownbey | ARMUR2 | Papaveraceae | |
| flatbud pricklypoppy | Argemone munita Dur. & Hilg. ssp. rotundata (Rydb.) G.B. Ownbey | ARMUR | Papaveraceae | |
| flatglobe dodder | Cuscuta umbellata Kunth | CUUM | Cuscutaceae | |
| flatleaf flatsedge | Cyperus planifolius L.C. Rich. | CYPL4 | Cyperaceae | |
| flatsedge | Cyperus dioicus I.M. Johnston | CYDI14 | Cyperaceae | |
| flatsedge | Cyperus L. | CYPER | Cyperaceae | |
| flatsedge | Cyperus tenerrimus Liebm. | CYTE12 | Cyperaceae | |
| flatseed sandmat | Chamaesyce platysperma (Engelm. ex S. Wats.) Shinners | CHPL3 | Euphorbiaceae | |
| flatspike sedge | Abildgaardia ovata (Burm. f.) Kral | ABOV | Cyperaceae | |
| flat-spiked sedge | Carex planispicata Naczi | CAPL18 | Cyperaceae | |
| flatspine burr ragweed | Ambrosia acanthicarpa Hook. | AMAC2 | Asteraceae | |
| flat-top pussytoes | Antennaria corymbosa E. Nels. | ANCO | Asteraceae | |
| flat-top whiteweed | Ageratum corymbosum Zuccagni ex Pers. | AGCO2 | Asteraceae | |
| flax dodder | Cuscuta epilinum Weihe | CUEP2 | Cuscutaceae | |
| flaxleaf false foxglove | Agalinis linifolia (Nutt.) Britt. | AGLI2 | Scrophulariaceae | |
| flaxleaf pimpernel | Anagallis monelli L. | ANMO2 | Primulaceae | |
| fleshcolor pincushion | Chaenactis xantiana Gray | CHXA | Asteraceae | |
| fleshy clapdaisy | Clappia suaedifolia Gray | CLSU | Asteraceae | |
| fleshy hawthorn | Crataegus succulenta Schrad. ex Link | CRSU5 | Rosaceae | |
| flexible ceanothus | Ceanothus ×flexilis Greene ex McMinn [cuneatus × prostratus] | CEFL4 | Rhamnaceae | |
| flexile milkvetch | Astragalus flexuosus (Hook.) Dougl. ex G. Don | ASFL2 | Fabaceae | |
| flexile milkvetch | Astragalus flexuosus (Hook.) Dougl. ex G. Don var. flexuosus | ASFLF | Fabaceae | |
| Flint Mountain milkvetch | Astragalus siliceus Barneby | ASSI3 | Fabaceae | |
| floating antlerfern | Ceratopteris pteridoides (Hook.) Hieron. | CEPT | Parkeriaceae | |
| floating marsh marigold | Caltha natans Pallas ex Georgi | CANA | Ranunculaceae | |
| Flodman's thistle | Cirsium flodmanii (Rydb.) Arthur | CIFL | Asteraceae | |
| flor de conchitas | Centrosema pubescens Benth. | CEPU5 | Fabaceae | |
| flor de pasmo | Bletia patula Graham | BLPA | Orchidaceae | |
| flor de pasmo | Bletia patula Graham var. alba A.D. Hawkes | BLPAA | Orchidaceae | |
| flor de pasmo | Bletia patula Graham var. patula | BLPAP | Orchidaceae | |
| Florida alicia | Chapmannia floridana Torr. & Gray | CHFL2 | Fabaceae | |
| Florida amaranth | Amaranthus floridanus (S. Wats.) Sauer | AMFL3 | Amaranthaceae | |
| Florida bellflower | Campanula floridana S. Wats. ex Gray | CAFL18 | Campanulaceae | |
| Florida biatorella lichen | Biatorella floridensis H. Magn. | BIFL | Biatorellaceae | |
| Florida bluestem | Andropogon floridanus Scribn. | ANFL | Poaceae | |
| Florida cacalia | Arnoglossum floridanum (Gray) H.E. Robins. | ARFL2 | Asteraceae | |
| Florida calamint | Clinopodium dentatum (Chapman) Kuntze | CLDE4 | Lamiaceae | |
| Florida cup lichen | Cladonia floridana Vainio | CLFL6 | Cladoniaceae | |
| Florida dot lichen | Arthonia floridana Willey | ARFL5 | Arthoniaceae | |
| Florida dutchman's pipe | Aristolochia maxima Jacq. | ARMA9 | Aristolochiaceae | |
| Florida false beardgrass | Chrysopogon pauciflorus (Chapman) Benth. ex Vasey | CHPA11 | Poaceae | |
| Florida flatsedge | Cyperus floridanus Britt. | CYFL6 | Cyperaceae | |
| Florida goldenaster | Chrysopsis floridana Small | CHFL8 | Asteraceae | |
| Florida greeneyes | Berlandiera subacaulis (Nutt.) Nutt. | BESU | Asteraceae | |
| Florida hammock sandmat | Chamaesyce ophthalmica (Pers.) Burch | CHOP2 | Euphorbiaceae | |
| Florida hammock sedge | Carex vexans F.J. Herm. | CAVE10 | Cyperaceae | |
| Florida hawthorn | Crataegus panda Beadle | CRPA3 | Rosaceae | |
| Florida hobblebush | Agarista D. Don ex G. Don | AGARI | Ericaceae | |
| Florida hobblebush | Agarista populifolia (Lam.) Judd | AGPO2 | Ericaceae | |
| Florida Keys Indian mallow | Abutilon hirtum (Lam.) Sweet | ABHI | Malvaceae | |
| Florida Keys sensitive pea | Chamaecrista deeringiana Small & Pennell | CHDE9 | Fabaceae | |
| Florida lacefern | Ctenitis sloanei (Poepp. ex Spreng.) Morton | CTSL | Dryopteridaceae | |
| Florida lady's nightcap | Bonamia grandiflora (Gray) Hallier f. | BOGR5 | Convolvulaceae | |
| Florida milkvetch | Astragalus obcordatus Ell. | ASOB3 | Fabaceae | |
| Florida milkweed | Asclepias feayi Chapman ex Gray | ASFE4 | Asclepiadaceae | |
| Florida orange lichen | Caloplaca floridana (Tuck.) S. Tucker | CAFL32 | Teloschistaceae | |
| Florida orangegrass | Ctenium floridanum (A.S. Hitchc.) A.S. Hitchc. | CTFL | Poaceae | |
| Florida pimpernel | Anagallis pumila Sw. | ANPU4 | Primulaceae | |
| Florida roseling | Callisia cordifolia (Sw.) E.S. Anderson & Woods. | CACO19 | Commelinaceae | |
| Florida sandreed | Calamovilfa curtissii (Vasey) Scribn. | CACU | Poaceae | |
| Florida scrub roseling | Callisia ornata (Small) G. Tucker | CAOR10 | Commelinaceae | |
| Florida sedge | Carex floridana Schwein. | CAFL5 | Cyperaceae | |
| Florida silver palm | Coccothrinax argentata (Jacq.) Bailey | COAR | Arecaceae | |
| Florida strap airplant | Catopsis floribunda L.B. Sm. | CAFL10 | Bromeliaceae | |
| Florida threeawn | Aristida rhizomophora Swallen | ARRH | Poaceae | |
| Florida tickseed | Coreopsis floridana E.B. Sm. | COFL6 | Asteraceae | |
| Florida toadwood | Cupania glabra Sw. | CUGL | Sapindaceae | |
| Florida wild indigo | Baptisia calycosa Canby | BACA4 | Fabaceae | |
| Florida wild indigo | Baptisia calycosa Canby var. calycosa | BACAC2 | Fabaceae | |
| Florida wild indigo | Baptisia calycosa Canby var. villosa Canby | BACAV | Fabaceae | |
| florist's cyclamen | Cyclamen persicum Miller | CYPE10 | Primulaceae | |
| florist's daisy | Chrysanthemum ×morifolium Ramat. (pro sp.) | CHMO14 | Asteraceae | |
| florist's spiraea | Astilbe japonica (Morr. & Dcne.) Gray | ASJA2 | Saxifragaceae | |
| Florke's cup lichen | Cladonia floerkeana (Fr.) Florke | CLFL5 | Cladoniaceae | |
| flowering dogwood | Cornus florida L. | COFL2 | Cornaceae | |
| flowering quince | Chaenomeles Lindl. | CHAEN6 | Rosaceae | |
| flowering quince | Chaenomeles speciosa (Sweet) Nakai | CHSP12 | Rosaceae | |
| flowering rush | Butomus umbellatus L. | BUUM | Butomaceae | |
| flymallow | Cienfuegosia Cav. | CIENF | Malvaceae | |
| flypoison | Amianthium muscitoxicum (Walt.) Gray | AMMU | Liliaceae | |
| Flyr's nemesis | Brickellia cordifolia Ell. | BRCO8 | Asteraceae | |
| Fogg's goosefoot | Chenopodium foggii H.A. Wahl | CHFO3 | Chenopodiaceae | |
| foolproofplant | Billbergia pyramidalis (Sims) Lindl. | BIPY | Bromeliaceae | |
| fool's parsley | Aethusa cynapium L. | AECY2 | Apiaceae | |
| foothill arnica | Arnica fulgens Pursh | ARFU3 | Asteraceae | |
| foothill flatsedge | Cyperus amabilis Vahl | CYAM | Cyperaceae | |
| foothill milkvetch | Astragalus tridactylicus Gray | ASTR7 | Fabaceae | |
| forage kochia | Bassia prostrata (L.) A.J. Scott | BAPR5 | Chenopodiaceae | |
| forest alsophila | Alsophila amintae Conant | ALAM5 | Cyatheaceae | |
| Forest Camp sandwort | Arenaria macradenia S. Wats. ssp. macradenia var. kuschei (Eastw.) Maguire | ARMAK2 | Caryophyllaceae | |
| forest clermontia | Clermontia kakeana Meyen | CLKA | Campanulaceae | |
| forest climbing bamboo | Arthrostylidium sarmentosum Pilger | ARSA6 | Poaceae | |
| forest cyrtandra | Cyrtandra giffardii Rock | CYGI3 | Gesneriaceae | |
| forest mirrorplant | Coprosma foliosa Gray | COFO2 | Rubiaceae | |
| forest sandmat | Chamaesyce clusiifolia (Hook. & Arn.) Arthur | CHCL3 | Euphorbiaceae | |
| forest spleenwort | Asplenium contiguum Kaulfuss | ASCO14 | Aspleniaceae | |
| forest spleenwort | Asplenium contiguum Kaulfuss var. contiguum | ASCOC4 | Aspleniaceae | |
| forest spleenwort | Asplenium contiguum Kaulfuss var. hirtulum C. Christens. | ASCOH | Aspleniaceae | |
| forest-oak | Allocasuarina torulosa (Aiton) L. A. S. Johnson | ALTO5 | Casuarinaceae | |
| forked chickweed | Cerastium dichotomum L. | CEDI5 | Caryophyllaceae | |
| forked fanwort | Cabomba furcata J.A. & J.H. Schultes | CAFU13 | Cabombaceae | |
| forked green fiddleneck | Amsinckia vernicosa Hook. & Arn. var. furcata (Suksdorf) Hoover | AMVEF | Boraginaceae | |
| forked jelly lichen | Collema dichotomum (With.) Coppins & J. R. Laundon | CODI13 | Collemataceae | |
| forked lineleaf fern | Antrophyum cajenense (Desv.) Spreng. | ANCA28 | Vittariaceae | |
| forked spleenwort | Asplenium septentrionale (L.) Hoffmann | ASSE | Aspleniaceae | |
| forked threeawn | Aristida basiramea Engelm. ex Vasey | ARBA2 | Poaceae | |
| forked wormwood | Artemisia furcata Bieb. | ARFU4 | Asteraceae | |
| forked wormwood | Artemisia furcata Bieb. var. furcata | ARFUF | Asteraceae | |
| forked wormwood | Artemisia furcata Bieb. var. heterophylla (Bess.) Hultén | ARFUH | Asteraceae | |
| forkleaf toothwort | Cardamine dissecta (Leavenworth) Al-Shehbaz | CADI28 | Brassicaceae | |
| Fort Bend hawthorn | Crataegus anamesa Sarg. | CRAN10 | Rosaceae | |
| Fort Miller clarkia | Clarkia williamsonii (Dur. & Hilg.) H.F. & M.E. Lewis | CLWI | Onagraceae | |
| Fort Sheridan hawthorn | Crataegus apiomorpha Sarg. | CRAP4 | Rosaceae | |
| Fort Wingate milkvetch | Astragalus wingatanus S. Wats. | ASWI2 | Fabaceae | |
| Fortuna Range suncup | Camissonia arenaria (A. Nels.) Raven | CAAR20 | Onagraceae | |
| fountain butterflybush | Buddleja alternifolia Maxim. | BUAL | Buddlejaceae | |
| fountain thistle | Cirsium fontinale (Greene) Jepson | CIFO2 | Asteraceae | |
| fountain thistle | Cirsium fontinale (Greene) Jepson var. fontinale | CIFOF | Asteraceae | |
| fourangle flatsedge | Cyperus tetragonus Ell. | CYTE5 | Cyperaceae | |
| fourleaf buchenavia | Buchenavia tetraphylla (Aubl.) Howard | BUTE4 | Combretaceae | |
| fourleaf maidenhair | Adiantum tetraphyllum Humb. & Bonpl. ex Willd. | ADTE2 | Pteridaceae | |
| fourleaf milkweed | Asclepias quadrifolia Jacq. | ASQU | Asclepiadaceae | |
| fourpetal pawpaw | Asimina tetramera Small | ASTE11 | Annonaceae | |
| fourpetal pussypaws | Cistanthe quadripetala (S. Wats.) Hershkovitz | CIQU4 | Portulacaceae | |
| fourstamen chickweed | Cerastium diffusum Pers. | CEDI7 | Caryophyllaceae | |
| fourwing milkvetch | Astragalus tetrapterus Gray | ASTE10 | Fabaceae | |
| fourwing saltbush | Atriplex canescens (Pursh) Nutt. | ATCA2 | Chenopodiaceae | |
| fourwing saltbush | Atriplex canescens (Pursh) Nutt. var. angustifolia (Torr.) S. Wats. | ATCAA3 | Chenopodiaceae | |
| fourwing saltbush | Atriplex canescens (Pursh) Nutt. var. canescens | ATCAC | Chenopodiaceae | |
| fourwing saltbush | Atriplex canescens (Pursh) Nutt. var. gigantea Welsh & Stutz | ATCAG4 | Chenopodiaceae | |
| fourwing saltbush | Atriplex canescens (Pursh) Nutt. var. laciniata Parish | ATCAL2 | Chenopodiaceae | |
| fourwing saltbush | Atriplex canescens (Pursh) Nutt. var. macilenta Jepson | ATCAM | Chenopodiaceae | |
| fox sedge | Carex vulpinoidea Michx. | CAVU2 | Cyperaceae | |
| fox sedge | Carex vulpinoidea Michx. var. pycnocephala F.J. Herm. | CAVUP2 | Cyperaceae | |
| fox sedge | Carex vulpinoidea Michx. var. vulpinoidea | CAVUV | Cyperaceae | |
| foxtail | Alopecurus brachystachus Bieb. | ALBR12 | Poaceae | |
| foxtail | Alopecurus L. | ALOPE | Poaceae | |
| foxtail copperleaf | Acalypha alopecuroidea Jacq. | ACAL2 | Euphorbiaceae | |
| foxtail flatsedge | Cyperus alopecuroides Rottb. | CYAL6 | Cyperaceae | |
| foxtail pricklegrass | Crypsis alopecuroides (Piller & Mitterp.) Schrad. | CRAL2 | Poaceae | |
| foxtail sedge | Carex alopecoidea Tuckerman | CAAL8 | Cyperaceae | |
| fragile campylopus moss | Campylopus fragilis (Brid.) Bruch & Schimp. in B.S.G. | CAFR19 | Dicranaceae | |
| fragile hawthorn | Crataegus fragilis Beadle | CRFR3 | Rosaceae | |
| fragile maidenhair | Adiantum fragile Sw. | ADFR | Pteridaceae | |
| fragile maidenhair | Adiantum fragile Sw. var. fragile | ADFRF | Pteridaceae | |
| fragile maidenhair | Adiantum fragile Sw. var. rigidulum (Mett. ex Kuhn) Proctor | ADFRR | Pteridaceae | |
| fragile midsorus fern | Blechnum fragile (Liebm.) Morton & Lellinger | BLFR | Blechnaceae | |
| fragile onion | Allium scilloides Dougl. ex S. Wats. | ALSC2 | Liliaceae | |
| fragile pinkfringe | Arthrostemma fragile Lindl. | ARFR10 | Melastomataceae | |
| fragile rockbrake | Cryptogramma stelleri (Gmel.) Prantl | CRST2 | Pteridaceae | |
| fragile sedge | Carex membranacea Hook. | CAME4 | Cyperaceae | |
| fragile sheath sedge | Carex fracta Mackenzie | CAFR2 | Cyperaceae | |
| fragilegrass | Aegopogon tenellus (DC.) Trin. | AETE | Poaceae | |
| fragrant bursera | Bursera fagaroides (Kunth) Engl. | BUFA | Burseraceae | |
| fragrant bursera | Bursera fagaroides (Kunth) Engl. var. elongata McVaugh & Rzed. | BUFAE | Burseraceae | |
| fragrant bursera | Bursera fagaroides (Kunth) Engl. var. fagaroides (Kunth) Engl. [excluded] | BUFAF | Burseraceae | |
| fragrant clematis | Clematis flammula L. | CLFL8 | Ranunculaceae | |
| fragrant cryptantha | Cryptantha grahamii I.M. Johnston | CRGR4 | Boraginaceae | |
| fragrant dutchman's pipe | Aristolochia odoratissima L. | AROD | Aristolochiaceae | |
| fragrant flatsedge | Cyperus odoratus L. | CYOD | Cyperaceae | |
| fragrant maidenhair | Adiantum melanoleucum Willd. | ADME | Pteridaceae | |
| fragrant manjack | Cordia dichotoma G. Forst. | CODI18 | Boraginaceae | |
| fragrant snakeroot | Ageratina herbacea (Gray) King & H.E. Robins. | AGHE5 | Asteraceae | |
| fragrant swallow-wort | Cynanchum northropiae (Schlechter) Alain | CYNO | Asclepiadaceae | |
| fragrant white sand verbena | Abronia elliptica A. Nels. | ABEL | Nyctaginaceae | |
| Franciscan manzanita | Arctostaphylos hookeri G. Don ssp. franciscana (Eastw.) Munz | ARHOF | Ericaceae | |
| Franciscan thistle | Cirsium andrewsii (Gray) Jepson | CIAN2 | Asteraceae | |
| frankincense | Boswellia sacra Flueckiger | BOSA3 | Burseraceae | |
| Franklin's hawthorn | Crataegus rhodella Ashe | CRRH2 | Rosaceae | |
| Franklin's sandwort | Arenaria franklinii Dougl. ex Hook. | ARFR | Caryophyllaceae | |
| Franklin's sandwort | Arenaria franklinii Dougl. ex Hook. var. franklinii | ARFRF2 | Caryophyllaceae | |
| Frank's sedge | Carex frankii Kunth | CAFR3 | Cyperaceae | |
| Fraser fir | Abies fraseri (Pursh) Poir. | ABFR | Pinaceae | |
| Fraser meadow garlic | Allium canadense L. var. fraseri Ownbey | ALCAF | Liliaceae | |
| Fraser's cymophyllus | Cymophyllus fraserianus (Ker-Gawl.) Kartesz & Gandhi | CYFR4 | Cyperaceae | |
| fraternal Indian paintbrush | Castilleja fraterna Greenm. | CAFR8 | Scrophulariaceae | |
| freckled milkvetch | Astragalus lentiginosus Dougl. ex Hook. | ASLE8 | Fabaceae | |
| freckled milkvetch | Astragalus lentiginosus Dougl. ex Hook. var. ambiguus Barneby | ASLEA2 | Fabaceae | |
| freckled milkvetch | Astragalus lentiginosus Dougl. ex Hook. var. antonius Barneby | ASLEA3 | Fabaceae | |
| freckled milkvetch | Astragalus lentiginosus Dougl. ex Hook. var. australis Barneby | ASLEA5 | Fabaceae | |
| freckled milkvetch | Astragalus lentiginosus Dougl. ex Hook. var. diphysus (Gray) M.E. Jones | ASLED | Fabaceae | |
| freckled milkvetch | Astragalus lentiginosus Dougl. ex Hook. var. floribundus Gray | ASLEF | Fabaceae | |
| freckled milkvetch | Astragalus lentiginosus Dougl. ex Hook. var. idriensis M.E. Jones | ASLEI | Fabaceae | |
| freckled milkvetch | Astragalus lentiginosus Dougl. ex Hook. var. ineptus (Gray) M.E. Jones | ASLEI2 | Fabaceae | |
| freckled milkvetch | Astragalus lentiginosus Dougl. ex Hook. var. latus (M.E. Jones) M.E. Jones | ASLEL | Fabaceae | |
| freckled milkvetch | Astragalus lentiginosus Dougl. ex Hook. var. lentiginosus | ASLEL3 | Fabaceae | |
| freckled milkvetch | Astragalus lentiginosus Dougl. ex Hook. var. micans Barneby | ASLEM3 | Fabaceae | |
| freckled milkvetch | Astragalus lentiginosus Dougl. ex Hook. var. nigricalycis M.E. Jones | ASLEN | Fabaceae | |
| freckled milkvetch | Astragalus lentiginosus Dougl. ex Hook. var. oropedii Barneby | ASLEO | Fabaceae | |
| freckled milkvetch | Astragalus lentiginosus Dougl. ex Hook. var. palans (M.E. Jones) M.E. Jones | ASLEP | Fabaceae | |
| freckled milkvetch | Astragalus lentiginosus Dougl. ex Hook. var. semotus Jepson | ASLES3 | Fabaceae | |
| freckled milkvetch | Astragalus lentiginosus Dougl. ex Hook. var. stramineus (Rydb.) Barneby | ASLES6 | Fabaceae | |
| freckled milkvetch | Astragalus lentiginosus Dougl. ex Hook. var. variabilis Barneby | ASLEV | Fabaceae | |
| freckled milkvetch | Astragalus lentiginosus Dougl. ex Hook. var. vitreus Barneby | ASLEV2 | Fabaceae | |
| Freeman maple | Acer ×freemanii E. Murr. [rubrum × saccharinum] | ACFR | Aceraceae | |
| Fremont County rockcress | Arabis pusilla Rollins | ARPU18 | Brassicaceae | |
| Fremont's chaffbush | Amphipappus fremontii Torr. & Gray ex Gray | AMFR2 | Asteraceae | |
| Fremont's chaffbush | Amphipappus fremontii Torr. & Gray ex Gray ssp. fremontii | AMFRF | Asteraceae | |
| Fremont's chaffbush | Amphipappus fremontii Torr. & Gray ex Gray ssp. spinosus (A. Nels.) Keck | AMFRS2 | Asteraceae | |
| Fremont's goosefoot | Chenopodium fremontii S. Wats. | CHFR3 | Chenopodiaceae | |
| Fremont's goosefoot | Chenopodium fremontii S. Wats. var. fremontii | CHFRF | Chenopodiaceae | |
| Fremont's horsehair lichen | Bryoria fremontii (Tuck.) Brodo & D. Hawksw. | BRFR60 | Parmeliaceae | |
| Fremont's leather flower | Clematis fremontii S. Wats. | CLFR | Ranunculaceae | |
| Fremont's milkvetch | Astragalus lentiginosus Dougl. ex Hook. var. fremontii (Gray ex Torr.) S. Wats. | ASLEF2 | Fabaceae | |
| Fremont's western rosinweed | Calycadenia fremontii Gray | CAFR | Asteraceae | |
| French hybrid ceanothus | Ceanothus ×delileanus Spach | CEDE11 | Rhamnaceae | |
| Frenchman's Bluff grapefern | Botrychium gallicomontanum Farrar & Johnson-Groh | BOGA2 | Ophioglossaceae | |
| Fresno County bird's beak | Cordylanthus tenuis Gray ssp. barbatus Chuang & Heckard | COTEB2 | Scrophulariaceae | |
| Fresno mat | Ceanothus fresnensis Dudley ex Abrams | CEFR | Rhamnaceae | |
| Fries' pussytoes | Antennaria friesiana (Trautv.) Ekman | ANFR | Asteraceae | |
| Fries' pussytoes | Antennaria friesiana (Trautv.) Ekman ssp. alaskana (Malte) Hultén | ANFRA | Asteraceae | |
| Fries' pussytoes | Antennaria friesiana (Trautv.) Ekman ssp. friesiana | ANFRF | Asteraceae | |
| Fries' pussytoes | Antennaria friesiana (Trautv.) Ekman ssp. neoalaskana (Porsild) Bayer & Stebbins | ANFRN | Asteraceae | |
| frightful sedge | Carex molestiformis Reznicek & P. Rothr. | CAMO35 | Cyperaceae | |
| fringed amaranth | Amaranthus fimbriatus (Torr.) Benth. ex S. Wats. | AMFI | Amaranthaceae | |
| fringed amaranth | Amaranthus venulosus S. Wats. | AMVE2 | Amaranthaceae | |
| fringed bluestar | Amsonia ciliata Walt. | AMCI | Apocynaceae | |
| fringed bluestar | Amsonia ciliata Walt. var. ciliata | AMCIC | Apocynaceae | |
| fringed bluestar | Amsonia ciliata Walt. var. tenuifolia (Raf.) Woods. | AMCIT | Apocynaceae | |
| fringed brome | Bromus ciliatus L. | BRCI2 | Poaceae | |
| fringed brome | Bromus ciliatus L. var. ciliatus | BRCIC3 | Poaceae | |
| fringed brome | Bromus ciliatus L. var. richardsonii (Link) Boivin | BRCIR | Poaceae | |
| fringed dodder | Cuscuta suaveolens Ser. | CUSU | Cuscutaceae | |
| fringed lichen | Anaptychia bryorum Poelt | ANBR15 | Physciaceae | |
| fringed lichen | Anaptychia Korber | ANAPT2 | Physciaceae | |
| fringed lichen | Anaptychia palmulata (Michaux) Vainio | ANPA10 | Physciaceae | |
| fringed lichen | Anaptychia setifera Rasanen | ANSE60 | Physciaceae | |
| fringed lichen | Anaptychia ulotrichoides (Vainio) Vainio | ANUL | Physciaceae | |
| fringed onion | Allium fimbriatum S. Wats. | ALFI2 | Liliaceae | |
| fringed onion | Allium fimbriatum S. Wats. var. fimbriatum | ALFIF | Liliaceae | |
| fringed redmaids | Calandrinia ciliata (Ruiz & Pavón) DC. | CACI2 | Portulacaceae | |
| fringed sedge | Carex crinita Lam. | CACR6 | Cyperaceae | |
| fringed sedge | Carex crinita Lam. var. brevicrinis Fern. | CACRB | Cyperaceae | |
| fringed sedge | Carex crinita Lam. var. crinita | CACRC2 | Cyperaceae | |
| fringed spiderflower | Cleome rutidosperma DC. | CLRU3 | Capparaceae | |
| fringed spineflower | Chorizanthe fimbriata Nutt. | CHFI2 | Polygonaceae | |
| fringed spineflower | Chorizanthe fimbriata Nutt. var. fimbriata | CHFIF | Polygonaceae | |
| fringed spineflower | Chorizanthe fimbriata Nutt. var. laciniata (Torr.) Jepson | CHFIL | Polygonaceae | |
| fringed spleenwort | Asplenium schizophyllum C. Christens. | ASSC8 | Aspleniaceae | |
| fringed thistle | Cirsium centaureae (Rydb.) K. Schum. | CICE | Asteraceae | |
| fringed wattle | Acacia fimbriata A. Cunn. ex G. Don | ACFI4 | Fabaceae | |
| fringed windmill grass | Chloris ciliata Sw. | CHCI | Poaceae | |
| fringeleaf tickseed | Coreopsis integrifolia Poir. | COIN4 | Asteraceae | |
| fringetree | Chionanthus L. | CHION | Oleaceae | |
| Front Range milkvetch | Astragalus sparsiflorus Gray | ASSP5 | Fabaceae | |
| Front Range milkvetch | Astragalus sparsiflorus Gray var. majusculus Gray | ASSPM | Fabaceae | |
| Front Range milkvetch | Astragalus sparsiflorus Gray var. sparsiflorus | ASSPS3 | Fabaceae | |
| frosted Indian paintbrush | Castilleja pruinosa Fern. | CAPR14 | Scrophulariaceae | |
| frosted orache | Atriplex laciniata L. | ATLA | Chenopodiaceae | |
| froststem suncup | Camissonia multijuga (S. Wats.) Raven | CAMU13 | Onagraceae | |
| frosty wattle | Acacia pruinosa A. Cunn. ex Benth. | ACPR4 | Fabaceae | |
| fruit rockcress | Arabis fructicosa A. Nels. | ARFR5 | Brassicaceae | |
| fuchsia begonia | Begonia foliosa Kunth | BEFO | Begoniaceae | |
| fuchsia begonia | Begonia foliosa Kunth var. miniata (Planch.) L.B. Sm. & Schub. | BEFOM | Begoniaceae | |
| Fuckel's corticifraga lichen | Corticifraga fuckelii (Rehm) D. Hawksw. & R. Sant. | COFU4 | Uncertain Lichen Family | |
| Fuller's hawthorn | Crataegus fulleriana Sarg. | CRFU2 | Rosaceae | |
| fullstem | Chamaechaenactis scaposa (Eastw.) Rydb. | CHSC | Asteraceae | |
| fullstem | Chamaechaenactis scaposa (Eastw.) Rydb. var. parva Preece & Turner | CHSCP | Asteraceae | |
| fullstem | Chamaechaenactis scaposa (Eastw.) Rydb. var. scaposa | CHSCS | Asteraceae | |
| Fulton hawthorn | Crataegus invicta Beadle | CRIN19 | Rosaceae | |
| fumewort | Corydalis DC. | CORYD | Fumariaceae | |
| Funck's hairsedge | Bulbostylis funckii (Steud.) C.B. Clarke | BUFU | Cyperaceae | |
| Funeral Mountain milkvetch | Astragalus funereus M.E. Jones | ASFU3 | Fabaceae | |
| funnel lily | Androstephium Torr. | ANDRO4 | Liliaceae | |
| fuzzy flatsedge | Cyperus pilosus Vahl | CYPI | Cyperaceae | |
| fuzzy maidenhair | Adiantum tricholepis Fée | ADTR | Pteridaceae | |
| fuzzy sedge | Carex hirtissima W. Boott | CAHI7 | Cyperaceae | |
| fuzzy wuzzy sedge | Carex hirsutella Mackenzie | CAHI6 | Cyperaceae | |
| Fynbos aloe | Aloe succotrina All. | ALSU8 | Aloaceae | |
| Gadsden hawthorn | Crataegus rigens Beadle | CRRI5 | Rosaceae | |
| galactic dot lichen | Arthonia galactitella Nyl. | ARGA2 | Arthoniaceae | |
| galen del monte | Cestrum laurifolium L'Hér. | CELA2 | Solanaceae | |
| Galisteo sand verbena | Abronia bigelovii Heimerl | ABBI | Nyctaginaceae | |
| Gallic cracked lichen | Acarospora gallica H. Magn. | ACGA2 | Acarosporaceae | |
| gallion hawthorn | Crataegus meridionalis Sarg. | CRME3 | Rosaceae | |
| gamba-pea | Crotalaria goreensis Guill. & Perr. | CRGO3 | Fabaceae | |
| Gambel's dwarf milkvetch | Astragalus gambelianus Sheldon | ASGA | Fabaceae | |
| Gambian dayflower | Commelina nigritana Benth. var. gambiae (C.B. Clarke) Brenan | CONIG | Commelinaceae | |
| gamón-blanco | Asphodelus albus Miller | ASAL19 | Liliaceae | |
| Gander's buckhorn cholla | Cylindropuntia ganderi (C.B. Wolf) J. Rebman | CYGA5 | Cactaceae | |
| Gander's cryptantha | Cryptantha ganderi I.M. Johnston | CRGA2 | Boraginaceae | |
| gaping dutchman's pipe | Aristolochia ringens Vahl | ARRI3 | Aristolochiaceae | |
| Garber's sandmat | Chamaesyce garberi (Engelm. ex Chapman) Small | CHGA3 | Euphorbiaceae | |
| garden asparagus | Asparagus officinalis L. | ASOF | Liliaceae | |
| garden chervil | Anthriscus cerefolium (L.) Hoffmann | ANCE | Apiaceae | |
| garden cornflower | Centaurea cyanus L. | CECY2 | Asteraceae | |
| garden cosmos | Cosmos bipinnatus Cav. | COBI2 | Asteraceae | |
| garden croton | Codiaeum variegatum (L.) Blume | COVA3 | Euphorbiaceae | |
| garden cucumber | Cucumis sativus L. | CUSA4 | Cucurbitaceae | |
| garden leek | Allium porrum L. | ALPO2 | Liliaceae | |
| garden onion | Allium ×proliferum (Moench) Schrad. ex Willd. [cepa × fistulosum] | ALPR6 | Liliaceae | |
| garden onion | Allium cepa L. | ALCE | Liliaceae | |
| garden orache | Atriplex hortensis L. | ATHO | Chenopodiaceae | |
| garden snapdragon | Antirrhinum majus L. | ANMA3 | Scrophulariaceae | |
| garden yellowrocket | Barbarea vulgaris Ait. f. | BAVU | Brassicaceae | |
| Gardner's saltbush | Atriplex gardneri (Moq.) D. Dietr. | ATGA | Chenopodiaceae | |
| garlic mustard | Alliaria petiolata (Bieb.) Cavara & Grande | ALPE4 | Brassicaceae | |
| Garrett's saltbush | Atriplex garrettii Rydb. | ATGA2 | Chenopodiaceae | |
| Gaspe serviceberry | Amelanchier sanguinea (Pursh) DC. var. gaspensis Wieg. | AMSAG | Rosaceae | |
| Gasquet manzanita | Arctostaphylos hispidula T.J. Howell | ARHI5 | Ericaceae | |
| gaymallow | Batesimalva Fryxell | BATES | Malvaceae | |
| Genevieve's Indian paintbrush | Castilleja genevievana Nesom | CAGE6 | Scrophulariaceae | |
| Georgia calamint | Clinopodium georgianum Harper | CLGE | Lamiaceae | |
| Georgia false indigo | Amorpha georgiana Wilbur | AMGE | Fabaceae | |
| Georgia false indigo | Amorpha georgiana Wilbur var. confusa Wilbur | AMGEC | Fabaceae | |
| Georgia false indigo | Amorpha georgiana Wilbur var. georgiana | AMGEG | Fabaceae | |
| Georgia Indian plaintain | Arnoglossum sulcatum (Fern.) H.E. Robins. | ARSU5 | Asteraceae | |
| Georgia rockcress | Arabis georgiana Harper | ARGE | Brassicaceae | |
| Georgia sweetshrub | Calycanthus brockianus Ferry & Ferry | CABR47 | Calycanthaceae | |
| Georgia tickseed | Coreopsis nudata Nutt. | CONU5 | Asteraceae | |
| Geraldton wax | Chamelaucium uncinatum Schauer | CHUN4 | Myrtaceae | |
| geraniumleaf thoroughwort | Chromolaena geraniifolia (Urban) King & H.E. Robins. | CHGE | Asteraceae | |
| German-madwort | Asperugo L. | ASPER | Boraginaceae | |
| German-madwort | Asperugo procumbens L. | ASPR | Boraginaceae | |
| Gerrard's aristea | Aristea gerrardii Weim. | ARGE2 | Iridaceae | |
| Geyer's milkvetch | Astragalus geyeri Gray | ASGE | Fabaceae | |
| Geyer's milkvetch | Astragalus geyeri Gray var. geyeri | ASGEG | Fabaceae | |
| Geyer's milkvetch | Astragalus geyeri Gray var. triquetrus (Gray) M.E. Jones | ASGET | Fabaceae | |
| Geyer's onion | Allium geyeri S. Wats. | ALGE | Liliaceae | |
| Geyer's onion | Allium geyeri S. Wats. var. chatterleyi Welsh | ALGEC | Liliaceae | |
| Geyer's onion | Allium geyeri S. Wats. var. geyeri | ALGEG | Liliaceae | |
| Geyer's sandmat | Chamaesyce geyeri (Engelm. & Gray) Small | CHGE2 | Euphorbiaceae | |
| Geyer's sandmat | Chamaesyce geyeri (Engelm. & Gray) Small var. geyeri | CHGEG | Euphorbiaceae | |
| Geyer's sandmat | Chamaesyce geyeri (Engelm. & Gray) Small var. wheeleriana (Warnock & M.C. Johnston) Mayfield | CHGEW | Euphorbiaceae | |
| Geyer's sedge | Carex geyeri Boott | CAGE2 | Cyperaceae | |
| ghanja kola | Cola nitida (Vent.) A. Chev. | CONI10 | Sterculiaceae | |
| ghost gum | Corymbia papuana (F. Muell.) K. D. Hill & L. A. S. Johnson | COPA40 | Myrtaceae | |
| gia verde | Casearia arborea (L.C. Rich.) Urban | CAAR8 | Flacourtiaceae | |
| giant angelica | Angelica ampla A. Nels. | ANAM | Apiaceae | |
| giant antitrichia moss | Antitrichia curtipendula (Hedw.) Brid. var. gigantea Sull. & Lesq. | ANCUG | Leucodontaceae | |
| giant bellflower | Campanula latifolia L. | CALA40 | Campanulaceae | |
| giant blue cohosh | Caulophyllum giganteum (Farw.) Loconte & Blackwell | CAGI6 | Berberidaceae | |
| giant blue eyed Mary | Collinsia grandiflora Lindl. | COGR2 | Scrophulariaceae | |
| giant calliergon moss | Calliergon giganteum (Schimp.) Kindb. | CAGI70 | Amblystegiaceae | |
| giant cane | Arundinaria gigantea (Walt.) Muhl. | ARGI | Poaceae | |
| giant cane | Arundinaria gigantea (Walt.) Muhl. ssp. gigantea | ARGIG | Poaceae | |
| giant chinquapin | Chrysolepis chrysophylla (Dougl. ex Hook.) Hjelmqvist | CHCH7 | Fagaceae | |
| giant chinquapin | Chrysolepis chrysophylla (Dougl. ex Hook.) Hjelmqvist var. chrysophylla | CHCHC4 | Fagaceae | |
| giant chinquapin | Chrysolepis chrysophylla (Dougl. ex Hook.) Hjelmqvist var. minor (Benth.) Munz | CHCHM | Fagaceae | |
| giant coreopsis | Coreopsis gigantea (Kellogg) Hall | COGI | Asteraceae | |
| giant dodder | Cuscuta reflexa Roxb. | CURE | Cuscutaceae | |
| giant dogwood | Cornus controversa Hemsl. ex Prain | COCO32 | Cornaceae | |
| giant filbert | Corylus maxima Miller | COMA18 | Betulaceae | |
| giant flatsedge | Cyperus giganteus Vahl | CYGI2 | Cyperaceae | |
| giant hyssop | Agastache Clayton ex Gronov. | AGAST | Lamiaceae | |
| giant kokee cyanea | Cyanea leptostegia Gray | CYLE5 | Campanulaceae | |
| giant milkvetch | Astragalus giganteus S. Wats. | ASGI2 | Fabaceae | |
| giant milkweed | Calotropis gigantea (L.) Ait. f. | CAGI11 | Asclepiadaceae | |
| giant mountain aster | Canadanthus modestus (Lindl.) Nesom | CAMO32 | Asteraceae | |
| giant red Indian paintbrush | Castilleja miniata Dougl. ex Hook. | CAMI12 | Scrophulariaceae | |
| giant red Indian paintbrush | Castilleja miniata Dougl. ex Hook. ssp. dixonii (Fern.) Kartesz | CAMID2 | Scrophulariaceae | |
| giant red Indian paintbrush | Castilleja miniata Dougl. ex Hook. ssp. miniata | CAMIM5 | Scrophulariaceae | |
| giant reed | Arundo donax L. | ARDO4 | Poaceae | |
| giant reed | Arundo L. | ARUND4 | Poaceae | |
| giant ricegrass | Achnatherum coronatum (Thurb.) Barkworth | ACCO21 | Poaceae | |
| giant sandreed | Calamovilfa gigantea (Nutt.) Scribn. & Merr. | CAGI3 | Poaceae | |
| giant sedge | Carex gigantea Rudge | CAGI4 | Cyperaceae | |
| giant shield lichen | Cetrelia cetrarioides (Duby) Culb. & C. Culb. | CECE4 | Parmeliaceae | |
| giant shield lichen | Cetrelia Culb. & C. Culb. | CETRE | Parmeliaceae | |
| giant shield lichen | Cetrelia monachorum (Zahlbr.) Culb. & C. Culb. | CEMO4 | Parmeliaceae | |
| giant shield lichen | Cetrelia olivetorum (Nyl.) Culb. & C. Culb. | CEOL2 | Parmeliaceae | |
| giant sumpweed | Cyclachaena xanthifolia (Nutt.) Fresen. | CYXA | Asteraceae | |
| giant taro | Alocasia macrorrhizos (L.) Schott | ALMA11 | Araceae | |
| giant yarrow | Achillea millefolium L. var. gigantea (Pollard) Nobs | ACMIG | Asteraceae | |
| Gibbs' milkvetch | Astragalus gibbsii Kellogg | ASGI | Fabaceae | |
| Gibson's cyanea | Cyanea macrostegia Hbd. ssp. gibsonii (Hbd.) Lammers | CYMAG | Campanulaceae | |
| gidgee | Acacia cambagei R. T. Baker | ACCA25 | Fabaceae | |
| Gila milkvetch | Astragalus gilensis Greene | ASGI3 | Fabaceae | |
| Gila River dodder | Cuscuta applanata Engelm. | CUAP | Cuscutaceae | |
| Gila River waterhyssop | Bacopa eisenii (Kellogg) Pennell | BAEI | Scrophulariaceae | |
| Gila thistle | Cirsium gilense Woot. & Standl. | CIGI | Asteraceae | |
| Gilman's evening-primrose | Camissonia kernensis (Munz) Raven ssp. gilmanii (Munz) Raven | CAKEG | Onagraceae | |
| Gilman's milkvetch | Astragalus gilmanii Tidestrom | ASGI4 | Fabaceae | |
| Gilman's springparsley | Cymopterus gilmanii Morton | CYGI | Apiaceae | |
| gingerleaf cyanea | Cyanea asarifolia St. John | CYAS | Campanulaceae | |
| giradol | Chrozophora tinctoria (L.) Raf. | CHTI2 | Euphorbiaceae | |
| glacial sedge | Carex glacialis Mackenzie | CAGL3 | Cyperaceae | |
| glacier brachythecium moss | Brachythecium glaciale Schimp. in B.S.G. | BRGL2 | Brachytheciaceae | |
| gladiator milkvetch | Astragalus xiphoides (Barneby) Barneby | ASXI | Fabaceae | |
| gland Indian paintbrush | Castilleja glandulifera Pennell | CAGL10 | Scrophulariaceae | |
| gland onion | Allium glandulosum Link & Otto | ALGL | Liliaceae | |
| gland sandwort | Arenaria congesta Nutt. var. glandulifera Maguire | ARCOG | Caryophyllaceae | |
| glandular clarkia | Clarkia arcuata (Kellogg) A. Nels. & J.F. Macbr. | CLAR | Onagraceae | |
| glandular nakedwood | Colubrina glandulosa Perkins | COGL5 | Rhamnaceae | |
| glandular nakedwood | Colubrina glandulosa Perkins var. antillana (M.C. Johnston) M.C. Johnston | COGLA | Rhamnaceae | |
| glandular silverbush | Argythamnia adenophora Gray | ARAD2 | Euphorbiaceae | |
| glassy onion | Allium hyalinum Curran | ALHY | Liliaceae | |
| glaucous wild cabbage | Caulanthus glaucus S. Wats. | CAGL12 | Brassicaceae | |
| Glenwood milkvetch | Astragalus loanus Barneby | ASLO2 | Fabaceae | |
| Glenwood Springs rockcress | Arabis oxylobula Greene | AROX | Brassicaceae | |
| globe artichoke | Cynara scolymus L. | CYSC2 | Asteraceae | |
| globe dodder | Cuscuta potosina Schaffn. | CUPO2 | Cuscutaceae | |
| globe dodder | Cuscuta potosina Schaffn. var. globifera Yuncker | CUPOG | Cuscutaceae | |
| globe earth lichen | Catapyrenium globosum J. W. Thomson | CAGL25 | Verrucariaceae | |
| globe flatsedge | Cyperus echinatus (L.) Wood | CYEC2 | Cyperaceae | |
| globe sedge | Carex perglobosa Mackenzie | CAPE12 | Cyperaceae | |
| globe springparsley | Cymopterus globosus (S. Wats.) S. Wats. | CYGL2 | Apiaceae | |
| glomerate sedge | Carex aggregata Mackenzie | CAAG2 | Cyperaceae | |
| glory of the snow | Chionodoxa forbesii Baker | CHFO9 | Liliaceae | |
| glory pea | Clianthus Sol. ex Lindl. | CLIAN | Fabaceae | |
| glory wattle | Acacia spectabilis A. Cunn. ex Benth. | ACSP9 | Fabaceae | |
| glorybower | Clerodendrum L. | CLERO2 | Verbenaceae | |
| glory-of-the-snow | Chionodoxa sardensis Whittall ex Barr & Sugden | CHSA11 | Liliaceae | |
| glory-pea | Clianthus puniceus (G. Don) Sol. Ex Lindl. | CLPU6 | Fabaceae | |
| glossy abelia | Abelia ×grandiflora (Rovelli ex André) Rehd. [chinensis × uniflora] | ABGR4 | Caprifoliaceae | |
| glossy hawthorn | Crataegus nitida (Engelm.) Sarg. | CRNI | Rosaceae | |
| glossy maidenhair | Adiantum pulverulentum L. | ADPU | Pteridaceae | |
| glossy red bryum moss | Bryum miniatum Lesq. | BRMI11 | Bryaceae | |
| glossyleaf manzanita | Arctostaphylos nummularia Gray | ARNU3 | Ericaceae | |
| glowing Indian paintbrush | Castilleja ornata Eastw. | CAOR21 | Scrophulariaceae | |
| Gmelin's saltbush | Atriplex gmelinii C.A. Mey. | ATGM | Chenopodiaceae | |
| Gmelin's sedge | Carex gmelinii Hook. & Arn. | CAGM | Cyperaceae | |
| Gmelin's wormwood | Artemisia gmelinii Webb ex Stechmann | ARGM | Asteraceae | |
| goatbush | Castela erecta Turp. | CAER3 | Simaroubaceae | |
| goatbush | Castela erecta Turp. ssp. erecta | CAERE2 | Simaroubaceae | |
| goatgrass | Aegilops bicornis (Forsskal) Jaub. & Spach | AEBI | Poaceae | |
| goatgrass | Aegilops comosa Sibth. & Smith | AECO | Poaceae | |
| goatgrass | Aegilops L. | AEGIL | Poaceae | |
| goatgrass | Aegilops longissima Schweinf. & Muschl. | AELO | Poaceae | |
| goatgrass | Aegilops speltoides Tausch | AESP2 | Poaceae | |
| goatgrass | Aegilops umbellulata Zhuk. | AEUM | Poaceae | |
| goatgrass | Aegilops ventricosa Tausch | AEVE | Poaceae | |
| goatweed | Capraria biflora L. | CABI13 | Scrophulariaceae | |
| goatwood | Cassipourea guianensis Aubl. | CAGU3 | Rhizophoraceae | |
| Godfrey's goldenaster | Chrysopsis godfreyi Semple | CHGO2 | Asteraceae | |
| Godfrey's sedge | Carex godfreyi Naczi | CAGO3 | Cyperaceae | |
| Goebel's bulbothrix lichen | Bulbothrix goebelii (Zenker) Hale | BUGO | Parmeliaceae | |
| gold-dust acacia | Acacia acinacea Lindl. | ACAC7 | Fabaceae | |
| golden asahinea lichen | Asahinea chrysantha (Tuck.) Culb. & C. Culb. | ASCH60 | Parmeliaceae | |
| golden carpetgrass | Axonopus aureus Beauv. | AXAU | Poaceae | |
| golden chamomile | Anthemis tinctoria L. | ANTI | Asteraceae | |
| golden cholla | Cylindropuntia echinocarpa (Engelm. & Bigelow) F.M. Knuth | CYEC3 | Cactaceae | |
| golden colicroot | Aletris aurea Walt. | ALAU | Liliaceae | |
| golden columbine | Aquilegia chrysantha Gray | AQCH | Ranunculaceae | |
| golden columbine | Aquilegia chrysantha Gray var. chrysantha | AQCHC2 | Ranunculaceae | |
| golden false beardgrass | Chrysopogon aciculatus (Retz.) Trin. | CHAC | Poaceae | |
| golden Indian paintbrush | Castilleja levisecta Greenm. | CALE27 | Scrophulariaceae | |
| golden leatherfern | Acrostichum aureum L. | ACAU3 | Pteridaceae | |
| golden lipfern | Cheilanthes bonariensis (Willd.) Proctor | CHBO5 | Pteridaceae | |
| golden mariposa lily | Calochortus aureus S. Wats. | CAAU8 | Liliaceae | |
| golden pricklypoppy | Argemone aenea G.B. Ownbey | ARAE | Papaveraceae | |
| golden pygmypoppy | Canbya aurea S. Wats. | CAAU2 | Papaveraceae | |
| golden saxifrage | Chrysosplenium L. | CHRYS8 | Saxifragaceae | |
| golden sedge | Carex aurea Nutt. | CAAU3 | Cyperaceae | |
| golden shower | Cassia fistula L. | CAFI3 | Fabaceae | |
| golden snakecactus | Bergerocactus emoryi (Engelm.) Britt. & Rose | BEEM | Cactaceae | |
| golden spiderflower | Cleome platycarpa Torr. | CLPL | Capparaceae | |
| golden suncup | Camissonia brevipes (Gray) Raven ssp. arizonica (Raven) Raven | CABRA | Onagraceae | |
| golden suncup | Camissonia brevipes (Gray) Raven ssp. brevipes | CABRB4 | Onagraceae | |
| golden tickseed | Coreopsis tinctoria Nutt. | COTI3 | Asteraceae | |
| golden tickseed | Coreopsis tinctoria Nutt. var. similis (Boynt.) H.M. Parker | COTIS | Asteraceae | |
| golden tickseed | Coreopsis tinctoria Nutt. var. tinctoria | COTIT | Asteraceae | |
| golden trumpet | Allamanda cathartica L. | ALCA7 | Apocynaceae | |
| golden wattle | Acacia pycnantha Benth. | ACPY3 | Fabaceae | |
| goldenaster | Chrysopsis (Nutt.) Ell. | CHRYS7 | Asteraceae | |
| goldenbowl mariposa lily | Calochortus concolor (Baker) Purdy | CACO4 | Liliaceae | |
| goldeneggs | Camissonia ovata (Nutt. ex Torr. & Gray) Raven | CAOV4 | Onagraceae | |
| goldenflower century plant | Agave chrysantha Peebles | AGCH2 | Agavaceae | |
| goldenhead | Acamptopappus (Gray) Gray | ACAMP | Asteraceae | |
| goldenleaf campylium moss | Campylium chrysophyllum (Brid.) J. Lange | CACH31 | Amblystegiaceae | |
| goldenmane tickseed | Coreopsis basalis (A. Dietr.) Blake | COBA2 | Asteraceae | |
| goldenrain wattle | Acacia prominens A. Cunn. ex G. Don | ACPR3 | Fabaceae | |
| goldenstar | Bloomeria Kellogg | BLOOM | Liliaceae | |
| goldenthread | Cuscuta salina Engelm. var. major Yuncker | CUSAM | Cuscutaceae | |
| goldenthread | Cuscuta salina Engelm. var. papillata Yuncker | CUSAP | Cuscutaceae | |
| goldentuft | Aurinia petraea (Ard.) Schur | AUPE3 | Brassicaceae | |
| goldenwave tickseed | Coreopsis intermedia Sherff | COIN2 | Asteraceae | |
| goldilocks | Aster linosyris (L.) Bernh. | ASLI15 | Asteraceae | |
| gold-of-pleasure | Camelina sativa (L.) Crantz | CASA2 | Brassicaceae | |
| gold-of-pleasure | Camelina sativa (L.) Crantz ssp. alyssum (P. Mill.) E. Schmid | CASAA | Brassicaceae | |
| gold-of-pleasure | Camelina sativa (L.) Crantz ssp. sativa | CASAS2 | Brassicaceae | |
| goldthread | Coptis Salisb. | COPTI | Ranunculaceae | |
| golf club moss | Catoscopium Brid. | CATOS2 | Catoscopiaceae | |
| good King Henry | Chenopodium bonus-henricus L. | CHBO | Chenopodiaceae | |
| Goodding's onion | Allium gooddingii Ownbey | ALGO | Liliaceae | |
| Goose Creek milkvetch | Astragalus anserinus Atwood, Goodrich & Welsh | ASAN7 | Fabaceae | |
| gooseberry gourd | Cucumis myriocarpus E. Mey. ex Naud. | CUMY | Cucurbitaceae | |
| goosefoot | Chenopodium L. | CHENO | Chenopodiaceae | |
| goosefoot moonpod | Ammocodon chenopodioides (Gray) Standl. | AMCH3 | Nyctaginaceae | |
| goosegrass | Acrachne Chiov. | ACRAC | Poaceae | |
| goosegrass | Acrachne racemosa (Roemer & J.A. Schultes) Ohwi | ACRA6 | Poaceae | |
| goosegrass sedge | Carex eleusinoides Turcz. ex C.A. Mey. | CAEL4 | Cyperaceae | |
| gopherweed | Baptisia lanceolata (Walt.) Ell. | BALA3 | Fabaceae | |
| gopherweed | Baptisia lanceolata (Walt.) Ell. var. lanceolata | BALAL | Fabaceae | |
| gorgojo | Curculigo scorzonerifolia (Lam.) Baker | CUSC | Liliaceae | |
| gourd | Cucurbita L. | CUCUR | Cucurbitaceae | |
| goutweed | Aegopodium L. | AEGOP | Apiaceae | |
| Gowen cypress | Cupressus goveniana Gord. | CUGO | Cupressaceae | |
| Gowen cypress | Cupressus goveniana Gord. ssp. goveniana | CUGOG | Cupressaceae | |
| graceful false flax | Camelina rumelica Velen. | CARU15 | Brassicaceae | |
| graceful hawthorn | Crataegus thermopegaea Palmer | CRTH4 | Rosaceae | |
| graceful kihifern | Adenophorus pinnatifidus Gaud. | ADPI | Grammitidaceae | |
| graceful lipfern | Cheilanthes yavapensis Reeves ex Windham | CHYA | Pteridaceae | |
| graceful midsorus fern | Blechnum insularum Morton & Lellinger | BLIN | Blechnaceae | |
| graceful sandmat | Chamaesyce hypericifolia (L.) Millsp. | CHHY2 | Euphorbiaceae | |
| graceful sedge | Carex gracillima Schwein. | CAGR2 | Cyperaceae | |
| graceful wattle | Acacia decora Rchb. | ACDE12 | Fabaceae | |
| graceful wattle | Acacia gracilifolia Maiden & Blakely | ACGR9 | Fabaceae | |
| Graham's thistle | Cirsium grahamii Gray | CIGR2 | Asteraceae | |
| Grahm's columbine | Aquilegia grahamii Welsh & Goodrich | AQGR | Ranunculaceae | |
| grama | Bouteloua Lag. | BOUTE | Poaceae | |
| Grand Canyon century plant | Agave phillipsiana W.C. Hodgson | AGPH | Agavaceae | |
| Grand Canyon suncup | Camissonia confertiflora (Raven) Raven | CACO32 | Onagraceae | |
| grand collomia | Collomia grandiflora Dougl. ex Lindl. | COGR4 | Polemoniaceae | |
| Grand Coulee onion | Allium constrictum (Ownbey & Mingrone) P. Peterson, Annable & Rieseberg | ALCO3 | Liliaceae | |
| grand fir | Abies grandis (Dougl. ex D. Don) Lindl. | ABGR | Pinaceae | |
| grand hawthorn | Crataegus grandis Ashe | CRGR13 | Rosaceae | |
| Grand Junction camissonia | Camissonia eastwoodiae (Munz) Raven | CAEA | Onagraceae | |
| Grand Junction cryptantha | Cryptantha aperta (Eastw.) Payson | CRAP2 | Boraginaceae | |
| Grand Junction milkvetch | Astragalus linifolius Osterhout | ASLI5 | Fabaceae | |
| Grand Rapids hawthorn | Crataegus ambitiosa Sarg. | CRAM4 | Rosaceae | |
| grand redstem | Ammannia robusta Heer & Regel | AMRO3 | Lythraceae | |
| grandleaf seagrape | Coccoloba pubescens L. | COPU | Polygonaceae | |
| granite flatsedge | Cyperus granitophilus McVaugh | CYGR10 | Cyperaceae | |
| grannybush | Croton cascarilla (L.) L. | CRCA29 | Euphorbiaceae | |
| Grant's rattlebox | Crotalaria virgulata Klotzsch ssp. grantiana (Harvey) Polhill | CRVIG | Fabaceae | |
| granule earth lichen | Catapyrenium granulosum (de Lesd.) J. W. Thomson | CAGR29 | Verrucariaceae | |
| granulose orange lichen | Caloplaca granulosa (Mull. Arg.) Jatta | CAGR60 | Teloschistaceae | |
| grape ivy | Cissus rhombifolia Vahl | CIRH2 | Vitaceae | |
| grapefern | Botrychium Sw. | BOTRY | Ophioglossaceae | |
| grapefruit | Citrus ×paradisi Macfad. (pro sp.) [maxima × sinensis] | CIPA3 | Rutaceae | |
| grapeleaf begonia | Begonia reniformis Dry. | BERE2 | Begoniaceae | |
| grass milkvetch | Astragalus chloodes Barneby | ASCH7 | Fabaceae | |
| grassland beggarticks | Bidens micrantha Gaud. | BIMI2 | Asteraceae | |
| grassland beggarticks | Bidens micrantha Gaud. ssp. ctenophylla (Sherff) Nagata & Ganders | BIMIC2 | Asteraceae | |
| grassland beggarticks | Bidens micrantha Gaud. ssp. micrantha | BIMIM | Asteraceae | |
| grassland croton | Croton dioicus Cav. | CRDI6 | Euphorbiaceae | |
| grassland sedge | Carex divulsa Stokes | CADI19 | Cyperaceae | |
| grassland sedge | Carex divulsa Stokes ssp. divulsa | CADID3 | Cyperaceae | |
| grassland suncup | Camissonia lacustris Raven | CALA39 | Onagraceae | |
| grassleaf orache | Atriplex littoralis L. | ATLI3 | Chenopodiaceae | |
| grassleaf roseling | Callisia graminea (Small) G. Tucker | CAGR25 | Commelinaceae | |
| grassleaf sedge | Carex agrostoides Mackenzie | CAAG | Cyperaceae | |
| grassleaf springbeauty | Claytonia eschscholtzii Cham. | CLES | Portulacaceae | |
| grassleaf sweet flag | Acorus gramineus Sol. ex Aiton | ACGR15 | Acoraceae | |
| grasslike sedge | Carex panicea L. | CAPA30 | Cyperaceae | |
| grassnut | Arachis prostrata Benth. | ARPR4 | Fabaceae | |
| grasspink | Calopogon R. Br. ex Ait. f. | CALOP2 | Orchidaceae | |
| grassyslope arctic sedge | Carex anthoxanthea J.& K. Presl | CAAN10 | Cyperaceae | |
| grassyslope sedge | Carex oreocharis Holm | CAOR | Cyperaceae | |
| gravel milkvetch | Astragalus sabulonum Gray | ASSA2 | Fabaceae | |
| gravelbar brickellbush | Brickellia cylindracea Gray & Engelm. | BRCY | Asteraceae | |
| gravelbar cryptantha | Cryptantha decipiens (M.E. Jones) Heller | CRDE | Boraginaceae | |
| gray alder | Alnus incana (L.) Moench | ALIN2 | Betulaceae | |
| gray alder | Alnus incana (L.) Moench ssp. incana (L.) Moench [excluded] | ALINI2 | Betulaceae | |
| gray birch | Betula populifolia Marsh. | BEPO | Betulaceae | |
| gray bottlebrush | Callistemon speciosus (Bonpl.) Sweet | CASP30 | Myrtaceae | |
| gray chickweed | Cerastium brachypetalum Desportes ex Pers. | CEBR2 | Caryophyllaceae | |
| gray clubawn grass | Corynephorus canescens (L.) Beauv. | COCA16 | Poaceae | |
| gray cryptantha | Cryptantha leucophaea (Dougl. ex Lehm.) Payson | CRLE6 | Boraginaceae | |
| gray dogwood | Cornus racemosa Lam. | CORA6 | Cornaceae | |
| gray five eyes | Chamaesaracha coniodes (Moric. ex Dunal) Britt. | CHCO | Solanaceae | |
| gray mangrove | Avicennia marina (Forssk.) Vierh. | AVMA3 | Verbenaceae | |
| gray mangrove | Avicennia marina (Forssk.) Vierh. var. resinifera (G. Forst.) Bakh. | AVMAR | Verbenaceae | |
| gray mulga | Acacia brachybotrya Benth. | ACBR3 | Fabaceae | |
| gray pine dwarf mistletoe | Arceuthobium occidentale Engelm. | AROC | Viscaceae | |
| gray saltbush | Atriplex cinerea Poir. | ATCI2 | Chenopodiaceae | |
| gray sheoak | Casuarina glauca Sieb. ex Spreng. | CAGL11 | Casuarinaceae | |
| gray springparsley | Cymopterus cinerarius Gray | CYCI2 | Apiaceae | |
| graygreen thistle | Cirsium canovirens (Rydb.) Petrak | CICA6 | Asteraceae | |
| grayhairy wild indigo | Baptisia cinerea (Raf.) Fern. & Schub. | BACI | Fabaceae | |
| Gray's angelica | Angelica grayi (Coult. & Rose) Coult. & Rose | ANGR3 | Apiaceae | |
| Gray's cup lichen | Cladonia grayi G. Merr. ex Sandst. | CLGR7 | Cladoniaceae | |
| Gray's cyrtandra | Cyrtandra grayi C.B. Clarke | CYGR12 | Gesneriaceae | |
| Gray's flatsedge | Cyperus grayi Torr. | CYGR2 | Cyperaceae | |
| Gray's milkvetch | Astragalus grayi Parry ex S. Wats. | ASGR4 | Fabaceae | |
| Gray's sedge | Carex grayi Carey | CAGR5 | Cyperaceae | |
| Great Basin brome | Bromus polyanthus Scribn. ex Shear | BRPO | Poaceae | |
| Great Basin brome | Bromus polyanthus Scribn. ex Shear var. paniculatus Shear | BRPOP | Poaceae | |
| Great Basin brome | Bromus polyanthus Scribn. ex Shear var. polyanthus | BRPOP2 | Poaceae | |
| Great Basin springbeauty | Claytonia umbellata S. Wats. | CLUM | Portulacaceae | |
| great bladdery milkvetch | Astragalus megacarpus (Nutt.) Gray | ASME2 | Fabaceae | |
| great bougainvillea | Bougainvillea spectabilis Willd. | BOSP6 | Nyctaginaceae | |
| great chickweed | Cerastium maximum L. | CEMA5 | Caryophyllaceae | |
| great Indian plaintain | Arnoglossum reniforme (Hook.) H.E. Robins. | ARRE6 | Asteraceae | |
| Great Plains false willow | Baccharis salicina Torr. & Gray | BASA | Asteraceae | |
| Great Plains flatsedge | Cyperus lupulinus (Spreng.) Marcks | CYLU2 | Cyperaceae | |
| Great Plains flatsedge | Cyperus lupulinus (Spreng.) Marcks ssp. lupulinus | CYLUL | Cyperaceae | |
| Great Plains flatsedge | Cyperus lupulinus (Spreng.) Marcks ssp. macilentus (Fern.) Marcks | CYLUM | Cyperaceae | |
| Great Plains sedge | Carex melanostachya Bieb. ex Willd. | CAME10 | Cyperaceae | |
| great ragweed | Ambrosia trifida L. | AMTR | Asteraceae | |
| great ragweed | Ambrosia trifida L. var. trifida | AMTRT2 | Asteraceae | |
| Great Smoky Mountain hawthorn | Crataegus penita Beadle | CRPE2 | Rosaceae | |
| Great Smoky Mountain sedge | Carex proposita Mackenzie | CAPR10 | Cyperaceae | |
| greater bladder sedge | Carex intumescens Rudge | CAIN12 | Cyperaceae | |
| greater brown sedge | Carex brunnea Thunb. | CABR19 | Cyperaceae | |
| greater burdock | Arctium lappa L. | ARLA3 | Asteraceae | |
| greater dodder | Cuscuta europaea L. | CUEU | Cuscutaceae | |
| greater galangal | Alpinia galanga (L.) Sw. | ALGA2 | Zingiberaceae | |
| greater knapweed | Centaurea scabiosa L. | CESC2 | Asteraceae | |
| greater rockjasmine | Androsace maxima L. | ANMA14 | Primulaceae | |
| greater straw sedge | Carex normalis Mackenzie | CANO | Cyperaceae | |
| greater swinecress | Coronopus squamatus (Forssk.) Aschers. | COSQ | Brassicaceae | |
| greater tickseed | Coreopsis major Walt. | COMA6 | Asteraceae | |
| greater yellow lady's slipper | Cypripedium parviflorum Salisb. var. makasin (Farw.) Sheviak | CYPAM3 | Orchidaceae | |
| greater yellow lady's slipper | Cypripedium parviflorum Salisb. var. pubescens (Willd.) Knight | CYPAP3 | Orchidaceae | |
| Greek thimbleweed | Anemone blanda Schott & Kotschy | ANBL2 | Ranunculaceae | |
| Greeley springparsley | Cymopterus acaulis (Pursh) Raf. var. greeleyorum J. Grimes & Packard | CYACG | Apiaceae | |
| green alder | Alnus viridis (Chaix) DC. | ALVI5 | Betulaceae | |
| green and gold | Chrysogonum virginianum L. | CHVI5 | Asteraceae | |
| green and gold | Chrysogonum virginianum L. var. australe (Alexander ex Small) Ahles | CHVIA | Asteraceae | |
| green and gold | Chrysogonum virginianum L. var. virginianum | CHVIV | Asteraceae | |
| green antelopehorn | Asclepias viridis Walt. | ASVI2 | Asclepiadaceae | |
| green cliffbrake | Cheilanthes viridis (Forssk.) Sw. | CHVI23 | Pteridaceae | |
| green comet milkweed | Asclepias viridiflora Raf. | ASVI | Asclepiadaceae | |
| green dragon | Arisaema dracontium (L.) Schott | ARDR3 | Araceae | |
| green false foxglove | Agalinis viridis (Small) Pennell | AGVI5 | Scrophulariaceae | |
| green fiddleneck | Amsinckia vernicosa Hook. & Arn. | AMVE | Boraginaceae | |
| green fiddleneck | Amsinckia vernicosa Hook. & Arn. var. vernicosa | AMVEV | Boraginaceae | |
| green flatsedge | Cyperus virens Michx. | CYVI2 | Cyperaceae | |
| green hawthorn | Crataegus viridis L. | CRVI2 | Rosaceae | |
| green hawthorn | Crataegus viridis L. var. viridis | CRVIV2 | Rosaceae | |
| green Indian paintbrush | Castilleja chrymactis Pennell | CACH8 | Scrophulariaceae | |
| green milkweed | Asclepias hirtella (Pennell) Woods. | ASHI | Asclepiadaceae | |
| green molly | Bassia americana (S. Wats.) A.J. Scott | BAAM4 | Chenopodiaceae | |
| Green Mountain maidenhair | Adiantum viridimontanum Paris | ADVI3 | Pteridaceae | |
| Green River milkvetch | Astragalus pubentissimus Torr. & Gray | ASPU6 | Fabaceae | |
| green rockcress | Arabis missouriensis Greene | ARMI5 | Brassicaceae | |
| green silkyscale | Anthaenantia villosa (Michx.) Beauv. | ANVI4 | Poaceae | |
| green snakewood | Condalia viridis I.M. Johnston | COVI8 | Rhamnaceae | |
| green wattle | Acacia decurrens (Wendl. f.) Willd. | ACDE | Fabaceae | |
| green wattle | Acacia irrorata Sieber ex Spreng. | ACIR | Fabaceae | |
| Greene brickellbush | Brickellia greenei Gray | BRGR2 | Asteraceae | |
| Greene's blue eyed Mary | Collinsia greenei Gray | COGR3 | Scrophulariaceae | |
| Greene's maple | Acer glabrum Torr. var. greenei Keller | ACGLG | Aceraceae | |
| Greene's mariposa lily | Calochortus greenei S. Wats. | CAGR | Liliaceae | |
| Greene's milkvetch | Astragalus flexuosus (Hook.) Dougl. ex G. Don var. greenei (Gray) Barneby | ASFLG | Fabaceae | |
| Greene's milkweed | Asclepias californica Greene ssp. greenei Woods. | ASCAG | Asclepiadaceae | |
| Greene's rabbitbrush | Chrysothamnus greenei (Gray) Greene | CHGR6 | Asteraceae | |
| Greene's rockcress | Arabis repanda S. Wats. var. greenei Jepson | ARREG | Brassicaceae | |
| greeneyes | Berlandiera DC. | BERLA | Asteraceae | |
| green-flower clermontia | Clermontia singuliflora (Rock) Rock | CLSI3 | Campanulaceae | |
| greenflower Indian mallow | Abutilon sandwicense (O. Deg.) Christoph. | ABSA2 | Malvaceae | |
| greenfruit sedge | Carex interrupta Boeckl. | CAIN17 | Cyperaceae | |
| greenheart | Colubrina arborescens (P. Mill.) Sarg. | COAR3 | Rhamnaceae | |
| Greenland brachythecium moss | Brachythecium groenlandicum (C. Jens.) Schljak. | BRGR10 | Brachytheciaceae | |
| Greenland cup lichen | Cladonia cornuta (L.) Hoffm. ssp. groenlandica (E. Dahl) Ahti | CLCOG2 | Cladoniaceae | |
| Greenland orange lichen | Caloplaca groenlandica Lynge | CAGR28 | Teloschistaceae | |
| greenleaf five eyes | Chamaesaracha coronopus (Dunal) Gray | CHCO2 | Solanaceae | |
| greenleaf manzanita | Arctostaphylos patula Greene | ARPA6 | Ericaceae | |
| greensheath sedge | Carex feta Bailey | CAFE4 | Cyperaceae | |
| greenstripe | Amaranthus acanthochiton Sauer | AMAC | Amaranthaceae | |
| greensword | Argyroxiphium virescens Hbd. | ARVI8 | Asteraceae | |
| greentinge Indian paintbrush | Castilleja chlorotica Piper | CACH15 | Scrophulariaceae | |
| greentwig | Brongniartia Kunth | BRONG | Fabaceae | |
| greenwhite sedge | Carex albolutescens Schwein. | CAAL5 | Cyperaceae | |
| Gregg's amaranth | Amaranthus greggii S. Wats. | AMGR2 | Amaranthaceae | |
| Gregg's hawthorn | Crataegus greggiana Egglest. | CRGR2 | Rosaceae | |
| Gregg's sensitive pea | Chamaecrista greggii (Gray) Pollard ex Heller | CHGR18 | Fabaceae | |
| gregorywood | Bucida buceras L. | BUBU | Combretaceae | |
| greygreen reindeer lichen | Cladina rangiferina (L.) Nyl. | CLRA60 | Cladoniaceae | |
| Griffin's bellflower | Campanula griffinii Morin | CAGR26 | Campanulaceae | |
| Griffith's cliostomum lichen | Cliostomum griffithii (Sm.) Coppins | CLGR9 | Bacidiaceae | |
| Griffiths' saltbush | Atriplex griffithsii Standl. | ATGR2 | Chenopodiaceae | |
| grimmia orange lichen | Caloplaca grimmiae (Nyl.) H. Olivier | CAGR27 | Teloschistaceae | |
| Grisebach's swallow-wort | Cynanchum grisebachianum (Schlechter) Alain | CYGR3 | Asclepiadaceae | |
| groovestem bouchea | Bouchea linifolia Gray | BOLI3 | Verbenaceae | |
| groovestem Indian plaintain | Arnoglossum plantagineum Raf. | ARPL4 | Asteraceae | |
| ground virginsbower | Clematis recta L. | CLRE2 | Ranunculaceae | |
| groundcone | Boschniakia C.A. Mey. ex Bong. | BOSCH | Orobanchaceae | |
| groundcover milkvetch | Astragalus humistratus Gray | ASHU2 | Fabaceae | |
| groundcover milkvetch | Astragalus humistratus Gray var. crispulus Barneby | ASHUC | Fabaceae | |
| groundcover milkvetch | Astragalus humistratus Gray var. hosackiae (Greene) M.E. Jones | ASHUH | Fabaceae | |
| groundcover milkvetch | Astragalus humistratus Gray var. humistratus | ASHUH3 | Fabaceae | |
| groundcover milkvetch | Astragalus humistratus Gray var. humivagans (Rydb.) Barneby | ASHUH2 | Fabaceae | |
| groundcover milkvetch | Astragalus humistratus Gray var. sonorae (Gray) M.E. Jones | ASHUS | Fabaceae | |
| groundcover milkvetch | Astragalus humistratus Gray var. tenerrimus M.E. Jones | ASHUT | Fabaceae | |
| ground-crescent milkvetch | Astragalus chamaemeniscus Barneby | ASCH5 | Fabaceae | |
| groundnut | Apios americana Medik. | APAM | Fabaceae | |
| groundnut | Apios Fabr. | APIOS | Fabaceae | |
| groundnut | Arachis villosulicarpa Hoehne | ARVI16 | Fabaceae | |
| groundplum milkvetch | Astragalus crassicarpus Nutt. | ASCR2 | Fabaceae | |
| groundplum milkvetch | Astragalus crassicarpus Nutt. var. berlandieri Barneby | ASCRB | Fabaceae | |
| groundplum milkvetch | Astragalus crassicarpus Nutt. var. cavus Barneby | ASCRC | Fabaceae | |
| groundplum milkvetch | Astragalus crassicarpus Nutt. var. crassicarpus | ASCRC3 | Fabaceae | |
| groundplum milkvetch | Astragalus crassicarpus Nutt. var. paysonii (E.H. Kelso) Barneby | ASCRP | Fabaceae | |
| groundplum milkvetch | Astragalus crassicarpus Nutt. var. trichocalyx (Nutt.) Barneby | ASCRT | Fabaceae | |
| Grouse Creek rockcress | Arabis falcatoria Rollins | ARFA2 | Brassicaceae | |
| grove hawthorn | Crataegus lucorum Sarg. | CRLU | Rosaceae | |
| grugru palm | Acrocomia media O.F. Cook | ACME2 | Arecaceae | |
| grugru palm | Acrocomia totai Mart. | ACTO5 | Arecaceae | |
| Grundlach's attorney | Clusia gundlachii Stahl | CLGU | Clusiaceae | |
| Guadalupe cryptantha | Cryptantha maritima (Greene) Greene | CRMA7 | Boraginaceae | |
| Guadalupe cryptantha | Cryptantha maritima (Greene) Greene var. maritima | CRMAM | Boraginaceae | |
| Guadalupe cryptantha | Cryptantha maritima (Greene) Greene var. pilosa I.M. Johnston | CRMAP | Boraginaceae | |
| Guadalupe leastdaisy | Chaetopappa hersheyi Blake | CHHE | Asteraceae | |
| Guadalupe milkvetch | Astragalus pictiformis Barneby | ASPI3 | Fabaceae | |
| Guadalupe Mountain sedge | Carex mckittrickensis P.W. Ball | CAMC | Cyperaceae | |
| Guadalupe rabbitbrush | Chrysothamnus spathulatus L.C. Anders. | CHSP3 | Asteraceae | |
| Guadalupe ricegrass | Achnatherum curvifolium (Swallen) Barkworth | ACCU6 | Poaceae | |
| Guadalupe suncup | Camissonia guadalupensis (S. Wats.) Raven | CAGU4 | Onagraceae | |
| Guadeloupe blackbead | Cojoba graciliflora (S.F. Blake) Britt. & Rose | COGR22 | Fabaceae | |
| Guadeloupe cypress | Cupressus guadalupensis S. Watson | CUGU2 | Cupressaceae | |
| Guadeloupe marlberry | Ardisia obovata Desv. ex Hamilton | AROB2 | Myrsinaceae | |
| guajillo | Acacia berlandieri Benth. | ACBE | Fabaceae | |
| guar | Cyamopsis tetragonoloba (L.) Taubert | CYTE11 | Fabaceae | |
| guara blanca | Cupania triquetra A. Rich. | CUTR | Sapindaceae | |
| guard withe | Cydista aequinoctialis (L.) Miers | CYAE | Bignoniaceae | |
| Guatemalan fir | Abies guatemalensis Rehder | ABGU | Pinaceae | |
| Guayama Copperleaf | Acalypha berteriana Muell.-Arg. | ACBE2 | Euphorbiaceae | |
| Guiana brosimum | Brosimum guianense (Aublet) Huber | BRGU2 | Moraceae | |
| Guinea bactris | Aiphanes minima (Gaertn.) Burret | AIMI | Arecaceae | |
| Guinea bactris | Bactris guineensis (L.) H. Moore | BAGU | Arecaceae | |
| gulch cyrtandra | Cyrtandra filipes Hbd. | CYFI5 | Gesneriaceae | |
| Gulf Coast searocket | Cakile constricta Rodman | CACO25 | Brassicaceae | |
| gulf coast swallow-wort | Cynanchum angustifolium Pers. | CYAN5 | Asclepiadaceae | |
| gulf croton | Croton punctatus Jacq. | CRPU6 | Euphorbiaceae | |
| gulf hawthorn | Crataegus resima Beadle | CRRE11 | Rosaceae | |
| gulf sandmat | Chamaesyce thymifolia (L.) Millsp. | CHTH4 | Euphorbiaceae | |
| gulf searocket | Cakile geniculata (B.L. Robins.) Millsp. | CAGE4 | Brassicaceae | |
| gum arabic | Acacia senegal (L.) Willd. | ACSE6 | Fabaceae | |
| gum arabic tree | Acacia nilotica (L.) Willd. ex Delile | ACNI2 | Fabaceae | |
| gum ghatti | Anogeissus latifolia (Roxb. ex DC.) Wallich ex Beddome | ANLA13 | Combretaceae | |
| gum tragacanth milkvetch | Astragalus gummifer Labill. | ASGU | Fabaceae | |
| gumbo limbo | Bursera simaruba (L.) Sarg. | BUSI | Burseraceae | |
| gumbo milkvetch | Astragalus ampullarius S. Wats. | ASAM6 | Fabaceae | |
| Gunnison County rockcress | Arabis pallidifolia Rollins | ARPA35 | Brassicaceae | |
| Gunnison milkvetch | Astragalus anisus M.E. Jones | ASAN4 | Fabaceae | |
| Gunnison's mariposa lily | Calochortus gunnisonii S. Wats. | CAGU | Liliaceae | |
| Gunnison's mariposa lily | Calochortus gunnisonii S. Wats. var. gunnisonii | CAGUG | Liliaceae | |
| Gunnison's mariposa lily | Calochortus gunnisonii S. Wats. var. perpulcher Cockerell | CAGUP | Liliaceae | |
| Gunnison's rockcress | Arabis gunnisoniana Rollins | ARGU | Brassicaceae | |
| gunsight clarkia | Clarkia xantiana Gray | CLXA | Onagraceae | |
| gunsight clarkia | Clarkia xantiana Gray ssp. xantiana | CLXAX | Onagraceae | |
| Guyanese wild coffee | Casearia guianensis (Aubl.) Urban | CAGU2 | Flacourtiaceae | |
| gypsum centaury | Centaurium maryannum B.L. Turner | CEMA19 | Gentianaceae | |
| gypsum grama | Bouteloua breviseta Vasey | BOBR | Poaceae | |
| gypsum milkvetch | Astragalus gypsodes Barneby | ASGY | Fabaceae | |
| gypsum ringstem | Anulocaulis leiosolenus (Torr.) Standl. var. gypsogenus (Waterfall) Spellenberg & T. Wooten | ANLEG | Nyctaginaceae | |
| gypsum springbeauty | Claytonia gypsophiloides Fisch. & C.A. Mey. | CLGY2 | Portulacaceae | |
| gypsum threeawn | Aristida gypsophila Beetle | ARGY4 | Poaceae | |
| gypsyflower | Cynoglossum officinale L. | CYOF | Boraginaceae |
Source: U. S. Department of Agriculture
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