Hickory, Shagbark [Carya ovata]
Holcus lanatus [Common Velvetgrass]
Holly-Leaved Daisybush [Olearia ilicifolia]
Honduras Mahogany [Swietenia macrophylla]
Hordeum vulagare [Barley]
Houseleek, Common [Sempervivum tectorum]
Hedgehyssop, Golden [Gratiola aurea]
Hylocomium splendens [Splendid Feather Moss]
Hymenaea courbaril [Stinkingtoe]
Hyparrhenia rufa [Jaragua]
Hypericum perforatum [St. John's Wort]
Hypnum cupressiforme [Hypnum Moss]