Haberlea
Habranthus
Hacquetia
Hakonechloa
Halesia
Halimiocistus
Halimium
Halimodendron
Hamamelis
Haplopappus
Hebe
Hedera
Hedychium
Hedysarum
Helenium
Helianthella
Helianthemum
Helianthus
Helichrysum
Helicodiceros
Helictotrichon
Heliopsis
Heliotropium
Helleborus
Heloniopsis
Hemerocallis
Hemiptelea
Hepatica
Heptacodium
Heracleum
Hermodactylus
Herniaria
Hesperis
Heterotheca
Heuchera
Heucherella
Hibanobambusa
Hibiscus
Hieracium
Hierochloe
Hippeastrum
Hippocrepis
Hippophae
Hippuris
Holcus
Holodiscus
Homeria
Horminum
Hosta
Hottonia
Houstonia
Houttuynia
Hovenia
Howea
Humulus
Hyacinthoides
Hyacinthus
Hydrangea
Hydrocharis
Hydrophyllum
Hylomecon
Hymenanthera
Hymenocallis
Hymenoxys
Hyophorbe
Hypericum
Hypochaeris
Hypsela
Hyssopus
Hystrix