Golden-Star 
Grass Daisy 
Grassy tarweed 
Gray Goldenrod 
Gray-seeded fleabane 
Greater burdock 
Greater Knapweed 
Green-and-Gold 
Groundsel Tree 
Gundelia anatolica 
Gundelia tournefortii 
Gymnarrhena 
Haast's mountain daisy 
Hairy false golden aster 
Hairy gumplant 
Heartleaf arnica 
Helianthus giganteus 
Helichrysum arenarium 
Helichrysum citrispinum 
Helichrysum formosissimum 
Hells Bells 
Hemisteptia lyrata 
Hemp Agrimony 
Hieracium albiflorum