genus Glycine genus Glycyrrhiza genus Gnaphalium genus Gnetum genus Gobiesox genus Gobio genus Gomphotherium genus Gomphrena genus Goniopteris genus Gonorhynchus
| genus Goodyera genus Gopherus genus Gorgonocephalus genus Gorilla genus Gossypium genus Gracula (current term) genus Grammatophyllum genus Grampus genus Graptophyllum genus Grevillea
| genus Grewia genus Grias genus Grindelia genus Griselinia genus Grison genus Groenlandia genus Grus genus Guaiacum genus Guevina genus Gulo
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