Select Genus

Choose from the Genera below to see a list of species and cultivars.
Email us if the plant you wish to report is not listed on the site, or to report any nomenclature errors.

H

Hackelia
Hacquetia
Hakonechloa
Halenia
Halerpestes
Halesia
Halimiocistus
Halimium
Halimodendron
Hamamelis
Harrimanella
Hartwrightia
Hasteola
Hebe
Hedeoma
Hedera
Hedychium
Hedysarum
Helanthium
Helenium
Helianthella
Helianthemum
Helianthus
Helictotrichon
Heliopsis
Heliotropium
Helleborus
Helminthotheca
Helonias
Hemerocallis
Hemitomes
Hemizonella
Heptacodium
Heracleum
Hermodactylus
Herniaria
Hesperis
Hesperochiron
Hesperostipa
Heteranthera
Heterocodon
Heterotheca
Heuchera
Hexalectris
Hexastylis
Hibiscus
Hieracium
Hippophaë
Hippuris
Holcus
Holodiscus
Holosteum
Homalocladium
Honckenya
Hordeum
Hornungia
Hosackia
Hosta
Hottonia
Houstonia
Houttuynia
Hovenia
Howellia
Hudsonia
Hulteniella
Humulus
Huperzia
Hyacinthoides
Hyacinthus
Hybanthus
Hydrangea
Hydrastis
Hydrocharis
Hydrocotyle
Hydrophyllum
Hylomecon
Hylotelephium
Hymenocallis
Hymenopappus
Hymenophyllum
Hymenoxys
Hyoscyamus
Hypericum
Hypochaeris
Hypopitys
Hypoxis
Hyssopus