| Common name | Botanical name |
| 1. Galbanum | Ferula galbaniflua |
| 2. Galingale | Cyperus bulbosus Cyperus elegans Cyperus odoratus Cyperus rotundus Cyperus scarious Cyperus tegetum |
| 3. Galingale, Engish | Cyperus longus |
| 4. Galium | Galium rotundifolium |
| 5. Gamari | Gmelina arborea |
| 6. Gamboge | Garcinia hanburyii |
| 7. Gamboge, Indian | Garcinia morella |
| 8. Garcinia | Garcinia gumi-gutta |
| 9. Garden croton | Codiaeum variegatum |
| 10. Garden plant | Jatropha multifida Jatropha thomsonii |
| 11. Gardenia | Gardenia florida Gardenia grandiflora Gardenia jasminoides Ellis Gardenia maruba Gardenia pictorum Gardenia radicans Gardenia gummifera |
| 12. Garland Chrysanthemum | Chrysanthemum coronarium |
| 13. Garland Flower | Daphne cneorum |
| 14. Garland, Mountain | Clarkia unguiculata |
| 15. Garlic | Allium sativum |
| 16. Garlic Mustard | Alliaria petiolata |
| 17. Garlic, Canada | Allium canadense |
| 18. Garlic, Giant | Allium scorodoprasum |
| 19. Garlic, Italian | Allium sativum var. ophioscordon |
| 20. Garuga | Garuga pinnata |
| 21. Gayfeather, Kansas | Liatris pycnostachya |
| 22. Gayfeather, Pink | Liatris aspera |
| 23. Gayfeather, Prairie | Liatris scariosa |
| 24. Gayfeather, Purple-blue | Liatris ligulistylis |
| 25. Gayfeather, Tall, White | Liatris scariosa var. alba 'White Spire' |
| 26. Gelsemium | Gelsemium nitidum |
| 27. Gelsemium, Burma | Gelsemium elegans |
| 28. Gems, Indian | Amethystea caerulea |
| 29. Gentian, American | Gentiana saponaria |
| 30. Gentian, Autumn | Gentiana amarella |
| 31. Gentian, Bottle | Gentiana andrewsii |
| 32. Gentian, Cream | Gentiana flavida |
| 33. Gentian, Cross-leaved | Gentiana cruciata |
| 34. Gentian, Downy | Gentiana puberula |
| 35. Gentian, Europe | Gentiana pannonica Gentiana punctata |
| 36. Gentian, Field | Gentiana campestris |
| 37. Gentian, Five-flowered | Gentiana quinqueflora |
| 38. Gentian, Japanese | Gentiana scabrae |
| 39. Gentian, Marsh | Gentiana pneumonanthe |
| 40. Gentian, Purple | Gentiana purpurea |
| 41. Gentian, Spring | Gentiana verna |
| 42. Gentian, Stemless | Gentiana acaulis var. angustifolia |
| 43. Gentian, Tibetan | Gentiana tibetica |
| 44. Gentian, Trumpet | Gentiana acaulis |
| 45. Gentian, Willow | Gentiana asclepiadea |
| 46. Gentian, Yellow | Gentiana lutea |
| 47. Georgina | Dahlia variabilis |
| 48. Geranium, Apple | Pelargonium odoratissimum |
| 49. Geranium, Apricot | Pelargonium scabrum 'M.Ninon' |
| 50. Geranium, Austrian | Pelargonium alpinum |
| 51. Geranium, Balm-scented | Pelargonium vitifolium |
| 52. Geranium, Blandford | Pelargonium x blandfordianum |
| 53. Geranium, Camphor-rose | Pelargonium x asperum 'Camphoratum' |
| 54. Geranium, Chocolate-mint or Fair Ellen Geranium or Staghorn Oak Geranium or Velvet Oak Geranium or Beauty Oak Geranium or Oak Geranium, Giant or Almond Geranium | Pelargonium quercifolium |
| 55. Geranium, Cinnamon or Gooseberry Geranium or Prince Rupert Geranium or Prince Rupert, Variegated or Fingerbowl Lemon Geranium | Pelargonium crispum |
| 56. Geranium, Clorinda | Pelargonium clorinda |
| 57. Geranium, Coconut | Pelargonium grossularioides |
| 58. Geranium, Gray Lady Plymouth or Lemon Mabel Geranium or Mint-rose Geranium, Variegated | Pelargonium x asperum |
| 59. Geranium, Knotted | Pelargonium gibbosum |
| 60. Geranium, Lime | Pelargonium x nervosum |
| 61. Geranium, Nutmeg | Pelargonium x fragrans |
| 62. Geranium, Old Fashion Rose or Rober's Lemon Rose Gerani | Pelargonium graveolens |
| 63. Geranium, Old Spice | Pelargonium x fragrans 'Logeei' |
| 64. Geranium, Peppermint | Pelargonium tomentosum |
| 65. Geranium, Pine or Geranium, Fernleaf | Pelargonium denticulatum |
| 66. Geranium, Prince of Orange or Citrosa Geranium | Pelargonium citrosum 'Mosquito fighter' |
| 67. Geranium, Scarlet Unique | Pelargonium x ignescens |
| 68. Geranium, Skeleton-rose | Pelargonium radens |
| 69. Geranium, Snowflake or Atomic Snowflake Geranium or Attar of Roses or Filbert Geranium | Pelargonium capitatum |
| 70. Geranium, Sorrel | Pelargonium acetosum |
| 71. Geranium, Southernwood | Pelargonium abrotanifolium |
| 72. Geranium, Strawberry | Pelargonium x scarboroviae |
| 73. German Statice | Goniolimon tataricum Limonium dumosum Limonium tataricum |
| 74. Germander | Teucrium |
| 75. Germander, Silver | Teucrium fruticans |
| 76. Gherkin, West Indian | Cucumis anguria |
| 77. Ghost Gum | Eucalyptus pauciflora |
| 78. Ghost Palm | Encephalartos barteri |
| 79. Ghostly Daisy | Gerbera anandria |
| 80. Giant Chives | Allium mortanum |
| 81. Giant Coreopsis | Coreopsis gigantea |
| 82. Giant fir | Abies grandis |
| 83. Giant-hyssop, Yellow | Agastache nepetoides |
| 84. Gilia, Blue | Gilia achilleifolia |
| 85. Ginger | Zingiber officinale Amomum zingiber |
| 86. Ginger grass | Cymbopogon martine Cymbopogon caesius |
| 87. Ginger, aromatic /Kencur or sand ginger | Kaempferia galanga |
| 88. Ginger, Leaf, Variegated | Zingiber darceyi |
| 89. Ginger, Peacock | Kaempferia roscoeana |
| 90. Ginger, Pine Cone, Red | Zingiber fairchildii |
| 91. Ginger, Red | Alpinia purpurata |
| 92. Ginger, Wild | Asarum canadense |
| 93. Ginger, Yellow | Hedychium flavescens |
| 94. Ginkgo | Salisburia adianthifolia Salisburia macrophylla |
| 95. Ginseng | Panax ginseng Panax schinseng |
| 96. Ginseng, American | Panax quinquefolium |
| 97. Ginseng, Asiatic | Panax pseudoginseng |
| 98. Ginseng, Siberian | Acanthopanax senticosus Eleutherococcus senticosus |
| 99. Gipsywort | Lycopus europaeus |
| 100. Glacier lily, Yellow | Erythronium grandiflorum |
| 101. Glade Mallow | Napea dioica |
| 102. Gladiolus | Gladiolus |
| 103. Gladwyn Iris | Iris foetidissima |
| 104. Glasswort | Salicornia europaea |
| 105. Globe Amaranth | Gomphrena globosa Gomphrena haageana |
| 106. Globe Artichoke | Cynara scolymus |
| 107. Globe Flower, Asiatic | Trollius asiaticus |
| 108. Globe Flower, USA | Trollius laxus |
| 109. Globe Garlic | Allium sphaerocephalon |
| 110. Globe Thistle | Echinops bannaticus |
| 111. Globe Thistle, Bright Blue | Echinops ritro ssp. ruthenicus |
| 112. Globe Thistle, Giant | Echinops spaerocephalus |
| 113. Globe Thistle, Russian | Echinops exaltatus |
| 114. Glory Flower, Chilean | Eccremocarpus scaber |
| 115. Glory Lily | Gloriosa rothschildiana |
| 116. Glory Lily, Malabar | Gloriosa superba |
| 117. Glory of The Snow | Chionodoxa luciliae |
| 118. Glory Pea | Clianthus formosus |
| 119. Glossy Abelia | Abelia x grandiflora |
| 120. Gluta | Gluta travancorica |
| 121. Glycosmis | Glycosmis macrocarpa |
| 122. Goat's Beard | Aruncus dioicus |
| 123. Goat's Rue | Galega officinalis |
| 124. Goatsbeard | Aruncus sinensis |
| 125. Gobo | Arctium lappa Hibiscus esculentus |
| 126. Gold Button | Pentzia.. |
| 127. Gold Nod Clematis | Clematis connata |
| 128. Gold spot | Hedychium coronarium |
| 129. Golden Rod | Solidago canadensis Solidago virgaurea |
| 130. Golden top grass | Lamarckia aurea |
| 131. Golden trumpet vine | Allamanda cathartica |
| 132. Goldenchain Tree | Laburnum x watereri |
| 133. Golden-eyed-grass | Sisyrinchium californicum |
| 134. Goldenrod, Hardleaf | Solidago rigida |
| 135. Goldenrod, Ornamental | Solidago glomerata |
| 136. Goldenrod, Showy | Solidago speciosa |
| 137. Goldenrod, Smooth Three-ribbed | Solidago gigantea |
| 138. Goldenrod, Sweet-scented | Solidago odora |
| 139. Goldilocks | Aster linosyris |
| 140. Goldthread | Coptis groenlandica Coptis trifolia |
| 141. Goniothalamus | Goniothalamus rhynchantherus |
| 142. Good King Henry | Chenopodium bonus-henricus |
| 143. Gooseberry | Physalis peruviana |
| 144. Gooseberry or Amla | Emblica officinalis |
| 145. Gooseberry, Black | Ribes lacustre |
| 146. Gooseberry, Wild | Ribes divaricatum Ribes uva-crispa |
| 147. Goosefoot | Chenopodium amaranticolor |
| 148. Goosefoot, Red | Chenopodium rubrum |
| 149. Gorse, Golden | Ulex europaeus |
| 150. Gorse, Spanish | Genista hispanica |
| 151. Gotu Kola | Hydrocotyle asiatica |
| 152. Gourd, Bitter or Balsam Pear | Momordica charantia |
| 153. Gourd, Buffalo | Cucurbita foetidissima |
| 154. Gourd, Snake | Trichosanthes anguina |
| 155. Gourds | Lagenaria siceraria |
| 156. Goutweed | Aegopodium podagraria |
| 157. Grains of Paradise | Amelopsis grana paradisi |
| 158. Granadilla, Common | Passiflora quadranguaris |
| 159. Grape Hyacinth | Muscari racemosum |
| 160. Grape or Vine | Vitis vinifera |
| 161. Grape, Mountain | Mahonia aquifolium |
| 162. Grape, Wild | Cissampelos convolulaceum |
| 163. Grapefruit | Citrus x paradisi |
| 164. Grape-leaf Anemone | Anemone vitifolia |
| 165. Grass Nut | Triteleia laxa |
| 166. Grass of Parnassus | Parnassia glauca |
| 167. Grass Tree, Australian | Xanthorroea australis |
| 168. Grass, Indian | Sorghastrum nutans |
| 169. Grassland Clover, Desert | Petalostemun exile |
| 170. Grassy Bells | Edraianthus graminifolius |
| 171. Gravelroot | Eupatorium purpureum |
| 172. Gray Poplar | Populus canescens |
| 173. Gray Santolina | Santolina incana |
| 174. Great burdock | Arctium lappa Lappa communis Lappa edulis Lappa major Lappa minor |
| 175. Great Burnet | Sanguisorba officinalis |
| 176. Great camas | Camassia leichtlinii |
| 177. Great Club-rush | Schoenoplectus lacustris |
| 178. Great Hairy Willow-herb | Epilobium hirsutum |
| 179. Great horsetail | Equisetum fluviatile Equisetum maximum |
| 180. Great Maple | Acer pseudoplatanus |
| 181. Great millet or Jowar / Broom-Corn | Sorghum bicolor Sorghum vulgare |
| 182. Great North Aster | Aster modestus |
| 183. Great Peacock Anemone | Anemone pavonia |
| 184. Great Sedge | Carex vulpina |
| 185. Great Solomon's Seal | Polygonatum canaliculatum |
| 186. Great Water Dock | Rumex hydrolapathum |
| 187. Greater Bindweed | Calystegia sepium |
| 188. Greater Burnet Saxifrage | Pimpinella major |
| 189. Greater Celandine | Chelidonium majus |
| 190. Greater Galangal | Alpinia galanga |
| 191. Greater Knapweed | Centaurea scabiosa |
| 192. Greater Patrinia | Patrinia gibbosa |
| 193. Grecian Foxglove | Digitalis lanata |
| 194. Green gram | Phaseolus radiatus |
| 195. Greenbrier | Smilax |
| 196. Greenheaded Coneflower | Rudbeckia laciniata |
| 197. Greenheart | Ocotea rodiaei |
| 198. Greenland tea | Ledum groenlandicum |
| 199. Grey alder | Alnus incana |
| 200. Grey Mulga | Acacia brachybotrya |
| 201. Grim-the-Collier | Hieracium aurantiacum |
| 202. Grindelia | Grindelia camporum |
| 203. Gromwell | Lithospermum officinale |
| 204. Ground Cherry | Physalis viscosa |
| 205. Ground Ivy | Glechoma hederacea Nepeta hederacea |
| 206. Ground Ivy, Variegated | Glechoma hederacea |
| 207. Groundnut or peanut | Apios americana Arachis hypogaea |
| 208. Groundsel, Common | Senecio vulgaris |
| 209. Groundsel, Mountain | Senecio sylvaticus |
| 210. Groundsel, Viscid | Senecio viscosus |
| 211. Guaco | Aristolochia cymbifera |
| 212. Guadaloupe Dragon's Bloo | Pterocarpus draco |
| 213. Guaiac Wood Oil | Bulnesia sarmienti |
| 214. Guaiacum | Guajacum officinale |
| 215. Guarana | Paullinia cupana |
| 216. Guava | Psidium guajava Psidum guava |
| 217. Guava, Strawberry | Psidium cattleianum |
| 218. Guelder Rose | Viburnum opulus Viburnum sterile |
| 219. Guina-guina | Guina-guina |
| 220. Guinea Rush | Cyperus articulatus |
| 221. Gulf-Weed | Fucus natans |
| 222. Gully Ash | Eucalyptus smithii |
| 223. Gum, Indian | Coplospermum gossypium |
| 224. Gum-lac | Aleurites laccifera |
| 225. Gummy gooseberry | Ribes lobbii |
| 226. Gumplant | Grindelia robusta |
| 227. Gumweed | Grindelia integrifolia |
| 228. Gumweed, Desert | Grindelia aphanactis |
| 229. Gungurru | Eucalyptus caesia |
| 230. Gunnera, Giant | Gunnera manicata |
| 231. Gurjan | Dipterocarpus bourdilloni Brandis, Dipterocarpus indicus |
| 232. Gymnacranthera | Gymnacranthera canarica |
| 233. Gympie Messmate | Eucalyptus cloeziana |