Giant airplant 
Giant foxtail 
Giant Reed 
Golden Bamboo 
Goudaea ospinae 
Grader Grass 
Gray Hairgrass 
Gray's sedge 
Great Woodrush 
Greater pond sedge 
Greater Quaking Grass 
Guacamaya superba 
Guinea Grass 
Guzmania angustifolia 
Guzmania bracteosa 
Guzmania cabrerae 
Guzmania coriostachya 
Guzmania diffusa 
Guzmania kressii 
Guzmania multifolora 
Guzmania musaica 
Guzmania pearcei 
Guzmania remyi 
Gynerium