Great Sundew 
Great Water Dock 
Great water dock 
Greater Stitchwort 
Grey Saltbush 
Grusonia invicta 
Gymnocalycium mihanovichi 
Gymnocarpos decander 
Gymnocarpos sclerocephalus 
Gypsophila capillaris 
Gypsophila glandulosa 
Gypsophila pilosa 
Gypsophila viscosa 
Haageocereus acranthus 
Haageocereus platinospinus 
Halocnemum strobilaceum 
Halogeton glomeratus 
Halogeton sativus 
Haloxylon negevensis 
Haloxylon salicornicum 
Heart-leaf Ice Plant 
Heartleaf springbeauty 
Hectorella caespitosa 
Hedge Salt-Bush