Greenflowered wintergreen 
Hairy Alpenrose 
Hairy manzanita 
Hairy Pine Sap 
Handsome Flowered Balsam 
He-Huckleberry 
Henderson's phlox 
Highland doghobble 
Himalayan Balsam 
Hooded pitcherplant 
Impatiens acaulis 
Impatiens bisaccata 
Impatiens hildebrandtii 
Impatiens kinabaluensis 
Impatiens platypetala 
Impatiens scapiflora 
Impatiens usambarensis 
Island marlberry 
Ivy-leaved cyclamen 
Jacob's Ladder 
Japanese Andromeda 
Japanese Camellia 
Japanese Primrose 
Japanese Snowbell