Green fringed-orchid 
Green-winged Orchid 
Greenhood 
Grogan's Lycaste 
Guarianthe aurantiaca 
Gymea lily 
Habenaria floribunda 
Habenaria grandifloriformis 
Habenaria medusa 
Habenaria monorrhiza 
Hairy garlic 
Hairy Solomon's Seal 
Harvest brodiaea 
Heath spotted-orchid 
Hidden Orchid 
Hippeastrum hybridum 
Hippeastrum striatum 
Honeybells 
Hooded orchid 
Hook-Carrying Masdevallia 
Hoop-petticoat daffodil 
Horned Lepanthes 
Hosta capitata 
Huntleya vargasii