| Symbol | Scientific name | Common name/Accepted name (for synonyms) | Family |
| GIDIR | Githopsis diffusa Gray ssp. robusta Morin | San Gabriel bluecup | Campanulaceae
|
| GIDI2 | Githopsis diffusa Gray | San Gabriel bluecup | Campanulaceae
|
| GIFI3 | Githopsis filicaulis Ewan | Githopsis diffusa ssp. filicaulis | Campanulaceae
|
| GIGI | Githopsis gilioides Ewan | Githopsis diffusa ssp. diffusa | Campanulaceae
|
| GILA4 | Githopsis latifolia Eastw. | Legousia speculum-veneris | Campanulaceae
|
| GIPUC | Githopsis pulchella Vatke ssp. campestris Morin | Sierra bluecup | Campanulaceae
|
| GIPUG | Githopsis pulchella Vatke ssp. pulchella var. glabra (Jepson) Morin | Sierra bluecup | Campanulaceae
|
| GIPUP2 | Githopsis pulchella Vatke ssp. pulchella var. pulchella | Sierra bluecup | Campanulaceae
|
| GIPUP | Githopsis pulchella Vatke ssp. pulchella | Sierra bluecup | Campanulaceae
|
| GIPUS | Githopsis pulchella Vatke ssp. serpentinicola Morin | Sierra bluecup | Campanulaceae
|
| GIPU2 | Githopsis pulchella Vatke | Sierra bluecup | Campanulaceae
|
| GISPC | Githopsis specularioides Nutt. ssp. candida Ewan | Githopsis diffusa ssp. candida | Campanulaceae
|
| GISPG3 | Githopsis specularioides Nutt. var. glabra Jepson | Githopsis pulchella ssp. pulchella var. glabra | Campanulaceae
|
| GISPH | Githopsis specularioides Nutt. var. hirsuta Nutt. | Githopsis specularioides | Campanulaceae
|
| GISP3 | Githopsis specularioides Nutt. | common bluecup | Campanulaceae
|
| GITE9 | Githopsis tenella Morin | tubeflower bluecup | Campanulaceae
|
| GITHO | Githopsis Nutt. | bluecup | Campanulaceae
|
| GLGE | Glabraria geniculata (Marsh.) Britt. | Litsea aestivalis | Lauraceae
|
| GLBY | Gladiolus byzantinus P. Mill. | Gladiolus communis ssp. byzantinus | Iridaceae
|
| GLCO | Gladiolus �colvillei Sweet | | Iridaceae
|
| GLCOB | Gladiolus communis L. ssp. byzantinus (P. Mill.) A. Hamilton | cornflag | Iridaceae
|
| GLCOC | Gladiolus communis L. ssp. communis | cornflag | Iridaceae
|
| GLCO2 | Gladiolus communis L. | cornflag | Iridaceae
|
| GLGA2 | Gladiolus �gandavensis hort. | | Iridaceae
|
| GLHO | Gladiolus �hortulanus Bailey | Gladiolus gandavensis | Iridaceae
|
| GLIT | Gladiolus italicus P. Mill. | Italian gladiolus | Iridaceae
|
| GLMU | Gladiolus murielae Kelway & Langport ex anon. | | Iridaceae
|
| GLPA3 | Gladiolus papilio Hook. f. | goldblotch gladiolus | Iridaceae
|
| GLSE | Gladiolus segetum Ker-Gawl. | Gladiolus italicus | Iridaceae
|
| GLTR2 | Gladiolus tristis L. | ever-flowering gladiolus | Iridaceae
|
| GLUK | Gladiolus ukambanensis (Baker) Marais | | Iridaceae
|
| GLADI | Gladiolus L. | gladiolus | Iridaceae
|
| GLBIB | Glandularia bipinnatifida (Nutt.) Nutt. var. bipinnatifida | Dakota mock vervain | Verbenaceae
|
| GLBIB2 | Glandularia bipinnatifida (Nutt.) Nutt. var. brevispicata Umber | Dakota mock vervain | Verbenaceae
|
| GLBI2 | Glandularia bipinnatifida (Nutt.) Nutt. | Dakota mock vervain | Verbenaceae
|
| GLCA2 | Glandularia canadensis (L.) Nutt. | rose mock vervain | Verbenaceae
|
| GLCH2 | Glandularia chamaedryfolia Juss. | Glandularia peruviana | Verbenaceae
|
| GLCH | Glandularia chiricahensis Umber | Chiricahua Mountain mock vervain | Verbenaceae
|
| GLDE2 | Glandularia delticola (Small ex Perry) Umber | moradia | Verbenaceae
|
| GLDR | Glandularia drummondii (Lindl.) Small | Glandularia canadensis | Verbenaceae
|
| GLELA | Glandularia elegans (Kunth) Umber var. asperata (Perry) Umber | mountain mock vervain | Verbenaceae
|
| GLELE | Glandularia elegans (Kunth) Umber var. elegans | mountain mock vervain | Verbenaceae
|
| GLEL2 | Glandularia elegans (Kunth) Umber | mountain mock vervain | Verbenaceae
|
| GLGO | Glandularia gooddingii (Briq.) Solbrig | southwestern mock vervain | Verbenaceae
|
| GLHI2 | Glandularia hispida Ruiz & Pav�n | hispid mock vervain | Verbenaceae
|
| GLHY | Glandularia �hybrida (Gr�nland & R�mpler) Nesom & Pruski | | Verbenaceae
|
| GLIN | Glandularia incisa (Hook.) Troncoso | crisped mock vervain | Verbenaceae
|
| GLLA2 | Glandularia lambertii (Sims) Small | Glandularia canadensis | Verbenaceae
|
| GLMA5 | Glandularia maritima (Small) Small | coastal mock vervain | Verbenaceae
|
| GLPE | Glandularia peruviana (L.) Druce | Peruvian mock vervain | Verbenaceae
|
| GLPO | Glandularia polyantha Umber | Rio Grande mock vervain | Verbenaceae
|
| GLPU3 | Glandularia pulchella (Sweet) Troncoso | South American mock vervain | Verbenaceae
|
| GLPU4 | Glandularia pumila (Rydb.) Umber | pink mock vervain | Verbenaceae
|
| GLQU | Glandularia quandrangulata (Heller) Umber | beaked mock vervain | Verbenaceae
|
| GLRA2 | Glandularia racemosa (Eggert) Umber | pale mock vervain | Verbenaceae
|
| GLTA | Glandularia tampensis (Nash) Small | Tampa mock vervain | Verbenaceae
|
| GLTE3 | Glandularia tenera (Spreng.) Cabrera | Latin American mock vervain | Verbenaceae
|
| GLTE5 | Glandularia tenuisecta (Briq.) Small | Glandularia pulchella | Verbenaceae
|
| GLTU | Glandularia tumidula (Perry) Umber | plains mock vervain | Verbenaceae
|
| GLVE2 | Glandularia verecunda Umber | Chihuahuan mock vervain | Verbenaceae
|
| GLWR | Glandularia wrightii (Gray) Umber | Davis Mountain mock vervain | Verbenaceae
|
| GLAND | Glandularia J.F. Gmel. | mock vervain | Verbenaceae
|
| GLUNW | Glandulicactus uncinatus (Engelm.) Backeberg var. wrightii Backeberg | Sclerocactus uncinatus var. wrightii | Cactaceae
|
| GLCO3 | Glaucium corniculatum (L.) J.H. Rudolph | blackspot hornpoppy | Papaveraceae
|
| GLFL | Glaucium flavum Crantz | yellow hornpoppy | Papaveraceae
|
| GLAUC | Glaucium P. Mill. | hornpoppy | Papaveraceae
|
| GLSU | Glaucocarpum suffrutescens (Rollins) Rollins | Uinta Basin waxfruit | Brassicaceae
|
| GLAUC2 | Glaucocarpum Rollins | waxfruit mustard | Brassicaceae
|
| GLRU3 | Glaucomaria rupicola (L.) Choisy | Lecanora rupicola | Lecanoraceae
|
| GLMAO2 | Glaux maritima L. ssp. obtusifolia (Fern.) Boivin | Glaux maritima | Primulaceae
|
| GLMAA2 | Glaux maritima L. var. angustifolia Boivin | Glaux maritima | Primulaceae
|
| GLMAM2 | Glaux maritima L. var. macrophylla Boivin | Glaux maritima | Primulaceae
|
| GLMAO | Glaux maritima L. var. obtusifolia Fern. | Glaux maritima | Primulaceae
|
| GLMA | Glaux maritima L. | sea milkwort | Primulaceae
|
| GLAUX | Glaux L. | milkwort | Primulaceae
|
| GLHEM | Glechoma hederacea L. var. micrantha Moric. | Glechoma hederacea | Lamiaceae
|
| GLHEP | Glechoma hederacea L. var. parviflora (Benth.) House | Glechoma hederacea | Lamiaceae
|
| GLHE2 | Glechoma hederacea L. | ground ivy | Lamiaceae
|
| GLECH | Glechoma L. | glechoma | Lamiaceae
|
| GLAQ | Gleditsia aquatica Marsh. | water locust | Fabaceae
|
| GLTE | Gleditsia �texana Sarg. (pro sp.) | | Fabaceae
|
| GLTRI | Gleditsia triacanthos L. var. inermis (L.) Schneid. | Gleditsia triacanthos | Fabaceae
|
| GLTR | Gleditsia triacanthos L. | honeylocust | Fabaceae
|
| GLEDI | Gleditsia L. | locust | Fabaceae
|
| GLLE5 | Glehnia leiocarpa Mathias | Glehnia littoralis ssp. leiocarpa | Apiaceae
|
| GLLIL | Glehnia littoralis F. Schmidt ex Miq. ssp. leiocarpa (Mathias) Hult�n | American silvertop | Apiaceae
|
| GLLIL2 | Glehnia littoralis F. Schmidt ex Miq. var. leiocarpa (Mathias) Boivin | Glehnia littoralis ssp. leiocarpa | Apiaceae
|
| GLLI | Glehnia littoralis F. Schmidt ex Miq. | American silvertop | Apiaceae
|
| GLEHN | Glehnia F. Schmidt ex Miq. | silvertop | Apiaceae
|
| GLBI | Gleichenia bifida (Willd.) Spreng. | Sticherus bifidus | Gleicheniaceae
|
| GLBR | Gleichenia brevipubis Christ | Sticherus brevipubis | Gleicheniaceae
|
| GLFL3 | Gleichenia flexuosa (Schrad.) Mett. | Dicranopteris flexuosa | Gleicheniaceae
|
| GLOW | Gleichenia owhyensis Hook. | Sticherus owhyensis | Gleicheniaceae
|
| GLPE2 | Gleichenia pectinata (Willd.) K. Presl | Dicranopteris pectinata | Gleicheniaceae
|
| GLRU2 | Gleichenia rubiginosa Mett. | Dicranopteris rubiginosa | Gleicheniaceae
|
| GLLO | Glinus lotoides L. | lotus sweetjuice | Molluginaceae
|
| GLRA | Glinus radiatus (Ruiz & Pav�n) Rohrb. | spreading sweetjuice | Molluginaceae
|
| GLINU | Glinus L. | sweetjuice | Molluginaceae
|
| GLSE2 | Gliricidia sepium (Jacq.) Kunth ex Walp. | quickstick | Fabaceae
|
| GLIRI | Gliricidia Kunth | quickstick | Fabaceae
|
| GLUM | Globifera umbrosa J.F. Gmel. | Micranthemum umbrosum | Scrophulariaceae
|