| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| GAMUM | Gaillardia multiceps Greene var. microcephala B.L. Turner | onion blanketflower | Asteraceae
|
| GAMUM2 | Gaillardia multiceps Greene var. multiceps | onion blanketflower | Asteraceae
|
| GAMU | Gaillardia multiceps Greene | onion blanketflower | Asteraceae
|
| GANE3 | Gaillardia neomexicana A. Nels. | Gaillardia pulchella var. pulchella | Asteraceae
|
| GAPA | Gaillardia parryi Greene | Parry's blanketflower | Asteraceae
|
| GAPI4 | Gaillardia picta Sweet | Gaillardia pulchella var. picta | Asteraceae
|
| GAPIL2 | Gaillardia pinnatifida Torr. var. linearis (Rydb.) Biddulph | red dome blanketflower | Asteraceae
|
| GAPIP2 | Gaillardia pinnatifida Torr. var. pinnatifida | red dome blanketflower | Asteraceae
|
| GAPI | Gaillardia pinnatifida Torr. | red dome blanketflower | Asteraceae
|
| GAPR4 | Gaillardia pringlei Rydb. | Gaillardia arizonica var. pringlei | Asteraceae
|
| GAPUA | Gaillardia pulchella Foug. var. australis Turner & M.A. Whalen | firewheel | Asteraceae
|
| GAPUP | Gaillardia pulchella Foug. var. picta (Sweet) Gray | firewheel | Asteraceae
|
| GAPUP2 | Gaillardia pulchella Foug. var. pulchella | firewheel | Asteraceae
|
| GAPU | Gaillardia pulchella Foug. | firewheel | Asteraceae
|
| GARI | Gaillardia rigida Small ex Rydb. | Gaillardia aestivalis var. aestivalis | Asteraceae
|
| GASE4 | Gaillardia serotina (Walt.) H. Rock | Gaillardia aestivalis var. aestivalis | Asteraceae
|
| GASP | Gaillardia spathulata Gray | western blanketflower | Asteraceae
|
| GASU | Gaillardia suavis (Gray & Engelm.) Britt. & Rusby | perfumeballs | Asteraceae
|
| GATR10 | Gaillardia trinervata Small | Gaillardia suavis | Asteraceae
|
| GAVI4 | Gaillardia villosa Rydb. | Gaillardia pulchella var. pulchella | Asteraceae
|
| GAILL | Gaillardia Foug. | blanketflower | Asteraceae
|
| GABR3 | Galactia brachypoda Torr. & Gray | Galactia erecta | Fabaceae
|
| GABR4 | Galactia brevipes Small | Galactia floridana | Fabaceae
|
| GACA | Galactia canescens Benth. | hoary milkpea | Fabaceae
|
| GADU2 | Galactia dubia DC. | West Indian milkpea | Fabaceae
|
| GAEG | Galactia eggersii Urban | Eggers' milkpea | Fabaceae
|
| GAELL2 | Galactia elliottii Nutt. var. leavenworthii Torr. & Gray | Galactia elliottii | Fabaceae
|
| GAEL2 | Galactia elliottii Nutt. | Elliott's milkpea | Fabaceae
|
| GAER | Galactia erecta (Walt.) Vail | erect milkpea | Fabaceae
|
| GAFA2 | Galactia fasciculata Vail | Galactia floridana | Fabaceae
|
| GAFLL | Galactia floridana Torr. & Gray var. longiracemosa Vail | Galactia floridana | Fabaceae
|
| GAFLM | Galactia floridana Torr. & Gray var. microphylla Chapman | Galactia microphylla | Fabaceae
|
| GAFL3 | Galactia floridana Torr. & Gray | Florida milkpea | Fabaceae
|
| GAGL4 | Galactia glabella Michx. | Galactia regularis | Fabaceae
|
| GAGR8 | Galactia grayi Vail | Galactia heterophylla | Fabaceae
|
| GAHE | Galactia heterophylla Gray | Gray's milkpea | Fabaceae
|
| GALO | Galactia longifolia (Jacq.) Benth. ex Hoehne | longleaf milkpea | Fabaceae
|
| GAMA | Galactia macreei M.A. Curtis | Galactia volubilis | Fabaceae
|
| GAMA2 | Galactia marginalis Benth. | edible milkpea | Fabaceae
|
| GAMI3 | Galactia microphylla (Chapman) H.J. Rogers ex Hall & Ward | littleleaf milkpea | Fabaceae
|
| GAMI5 | Galactia minor Duncan | Galactia microphylla | Fabaceae
|
| GAMI6 | Galactia mississippiensis (Vail) Rydb. | Galactia volubilis | Fabaceae
|
| GAMO4 | Galactia mohlenbrockii R.H. Maxwell | Dioclea multiflora | Fabaceae
|
| GAMON | Galactia mollis Michx. var. nashii Vail | Galactia mollis | Fabaceae
|
| GAMO2 | Galactia mollis Michx. | soft milkpea | Fabaceae
|
| GAPA7 | Galactia parvifolia A. Rich. | small-leaf milkpea | Fabaceae
|
| GAPI3 | Galactia pinetorum Small | pineland milkpea | Fabaceae
|
| GAPR3 | Galactia prostrata Small | Galactia smallii | Fabaceae
|
| GARE2 | Galactia regularis (L.) B.S.P. | eastern milkpea | Fabaceae
|
| GASM | Galactia smallii H.J. Rogers ex Herndon | Small's milkpea | Fabaceae
|
| GASP6 | Galactia spiciformis Torr. & Gray | Galactia striata | Fabaceae
|
| GAST2 | Galactia striata (Jacq.) Urban | Florida hammock milkpea | Fabaceae
|
| GATE | Galactia texana (Scheele) Gray | Texas milkpea | Fabaceae
|
| GAVOM | Galactia volubilis (L.) Britt. var. mississippiensis Vail | Galactia volubilis | Fabaceae
|
| GAVO | Galactia volubilis (L.) Britt. | downy milkpea | Fabaceae
|
| GAWRM | Galactia wrightii Gray var. mollissima Kearney & Peebles | Wright's milkpea | Fabaceae
|
| GAWRW | Galactia wrightii Gray var. wrightii | Wright's milkpea | Fabaceae
|
| GAWR | Galactia wrightii Gray | Wright's milkpea | Fabaceae
|
| GALAC | Galactia P. Br. | milkpea | Fabaceae
|
| GAEL3 | Galanthus elewesii Hook. f. | giant snowdrop | Liliaceae
|
| GANI | Galanthus nivalis L. | snowdrop | Liliaceae
|
| GALAN | Galanthus L. | snowdrop | Liliaceae
|
| GAAR8 | Galarhoeus arkansanus (Engelm. & Gray) Small ex Rydb. | Euphorbia spathulata | Euphorbiaceae
|
| GAAU | Galarhoeus austrinus (Small) Small | Euphorbia segetalis | Euphorbiaceae
|
| GACOE2 | Galarhoeus commutatus (Engelm.) Small var. erectus (J.B.S. Norton) Small | Euphorbia commutata | Euphorbiaceae
|
| GACO8 | Galarhoeus commutatus (Engelm.) Small | Euphorbia commutata | Euphorbiaceae
|
| GACY2 | Galarhoeus cyparissias (L.) Small ex Rydb. | Euphorbia cyparissias | Euphorbiaceae
|
| GADA | Galarhoeus darlingtonii (Gray) Small | Euphorbia purpurea | Euphorbiaceae
|
| GAES | Galarhoeus esula (L.) Rydb. | Euphorbia esula var. esula | Euphorbiaceae
|
| GAFL4 | Galarhoeus floridanus (Chapman) Small | Euphorbia floridana | Euphorbiaceae
|
| GAHE8 | Galarhoeus helioscopius (L.) Haw. | Euphorbia helioscopia | Euphorbiaceae
|
| GAIN3 | Galarhoeus inundatus (Torr. ex Chapman) Small | Euphorbia inundata | Euphorbiaceae
|
| GALA10 | Galarhoeus lathyris (L.) Haw. | Euphorbia lathyris | Euphorbiaceae
|
| GALU3 | Galarhoeus lucidus (Waldst. & Kit.) Rydb. | Euphorbia lucida | Euphorbiaceae
|
| GAOB2 | Galarhoeus obtusatus (Pursh) Small | Euphorbia spathulata | Euphorbiaceae
|
| GAPE3 | Galarhoeus peplus (L.) Rydb. | Euphorbia peplus | Euphorbiaceae
|
| GAPL | Galarhoeus platyphyllos (L.) Small | Euphorbia platyphyllos | Euphorbiaceae
|
| GATE7 | Galarhoeus telephioides (Chapman) Small | Euphorbia telephioides | Euphorbiaceae
|
| GATR9 | Galarhoeus trichotomus (Kunth) Small | Euphorbia trichotoma | Euphorbiaceae
|
| GABU3 | Galatea bulbosa (P. Mill.) Britt. | Eleutherine bulbosa | Iridaceae
|
| GAAP | Galax aphylla auct. non L. | Galax urceolata | Diapensiaceae
|
| GAUR2 | Galax urceolata (Poir.) Brummitt | beetleweed | Diapensiaceae
|
| GALAX | Galax Sims | galax | Diapensiaceae
|
| GAPA8 | Gale palustris Chev. | Myrica gale | Myricaceae
|
| GABE2 | Galeandra beyrichii Reichenb. f. | Beyrich's hooded orchid | Orchidaceae
|
| GALEA | Galeandra Lindl. & F.A. Bayer | hooded orchid | Orchidaceae
|
| GASP5 | Galearis spectabilis (L.) Raf. | showy orchid | Orchidaceae
|
| GALEA2 | Galearis Raf. | galearis | Orchidaceae
|
| GACA8 | Galega caribaea Jacq. | Coursetia caribaea var. caribaea | Fabaceae
|
| GAFL5 | Galega florida F.G. Dietr. | Tephrosia florida | Fabaceae
|
| GAOF | Galega officinalis L. | professor-weed | Fabaceae
|
| GASP12 | Galega spicata Walt. | Tephrosia spicata | Fabaceae
|
| GALEG | Galega L. | professor-weed | Fabaceae
|
| GAPU80 | Galenia pubescens (Ecklon & Zeyh.) Druce | coastal galenia | Aizoaceae
|
| GASE3 | Galenia secunda (L. f.) Sonder | onesided galenia | Aizoaceae
|
| GALEN | Galenia L. | galenia | Aizoaceae
|
| GAAN5 | Galeopsis angustifolia Ehrh. ex Hoffmann | narrowleaf hempnettle | Lamiaceae
|
| GABI3 | Galeopsis bifida Boenn. | splitlip hempnettle | Lamiaceae
|
| GALAA | Galeopsis ladanum L. var. angustifolia (Ehrh. ex Hoffmann) Wallr. | Galeopsis angustifolia | Lamiaceae
|
| GALAL | Galeopsis ladanum L. var. ladanum | red hempnettle | Lamiaceae
|
| GALAL2 | Galeopsis ladanum L. var. latifolia (Hoffmann) Wallr. | red hempnettle | Lamiaceae
|