HE

Hebelia

Helodea

Helonias

Helleborus

Hemerocallis

Hemionitis

Heriteria

Hesperocyparis

× Hesperotropsis

Hexaglochin

HI

Hippochaete

HO

Horkelia

HU

Huperzia

HY

Hyacinthoides

Hyacinthus

Hydora

Hydrocharis

Hydrophace