Gasteranthus atratus 
Gasteranthus quitensis 
Geneva bugleweed 
German hedgenettle 
Gesneria pedunculosa 
Giant blue eyed Mary 
Giant red Indian paintbrush 
Giant salvia 
Globularia alypum 
Globularia cordifolia 
Globularia punctata 
Glossoloma panamense 
Glossoloma schultzei 
Gloxinia perennis 
Gold Purse 
Golden Paintbrush 
Golden Shrimp Plant 
Golden Trumpet-Tree 
Golden-beard penstemon 
Golden-Bell 
Goldfish Plant 
Great mullein 
Greater Yellow-Rattle 
Greek Sage