Explore 23,508 Species
Lizard Orchid
Himantoglossum hircinum (L.) Spreng.
Himantoglossum hircinum, the lizard orchid, is a goat-scented European orchid th…
giant orchid
Himantoglossum robertianum (Loisel.) P.Delforge
Himantoglossum robertianum is a bulbous Mediterranean orchid with an edible cook…
Star of Bethlehem
Hippobroma longiflora (L.) G.Don
Hippobroma longiflora is a toxic flowering Campanulaceae species endemic to Jama…
False horsewood
Hippobromus pauciflorus (L.fil.) Radlk.
Hippobromus pauciflorus is a small semi-deciduous tree native to eastern souther…
horseshoe vetch
Hippocrepis comosa L.
Hippocrepis comosa is a UK limestone/chalk plant that is the exclusive caterpill…
Scorpion Senna
Hippocrepis emerus (L.) Lassen
Hippocrepis emerus is a perennial shrub that is a main host plant for the moth Z…
Manchineel
Hippomane mancinella L.
Hippomane mancinella, the poisonous manchineel tree, native to tropical American…
Sea-buckthorn
Hippophae rhamnoides L.
Hippophae rhamnoides (sea-buckthorn) is a hardy dioecious shrub native to Eurasi…
Common Mare's Tail
Hippuris vulgaris L.
Hippuris vulgaris L., or common mare's tail, is an aquatic creeping perennial he…
Hiptage
Hiptage benghalensis (L.) Kurz
Hiptage benghalensis is a tropical liana/shrub native to South Asia, invasive el…
Shortpod Mustard
Hirschfeldia incana (L.) Lagr.-Foss.
Hirschfeldia incana, the only species in genus Hirschfeldia, is a mustard native…
Water Fern
Histiopteris incisa (Thunb.) J.Sm.
Histiopteris incisa, the bat's wing fern, is a medium southern hemisphere fern w…
Indian rushpea
Hoffmannseggia glauca (Ortega) Eifert
Hoffmannseggia glauca is a small perennial herb, a noxious weed in Kansas, with …
Wand Holdback
Hoffmannseggia microphylla Torr.
Hoffmannseggia microphylla, or wand holdback, is a perennial legume shrub native…
Narrow-leaved lacebark
Hoheria angustifolia Raoul
Hoheria angustifolia is a New Zealand endemic evergreen lacebark tree or shrub i…
North Island lacebark
Hoheria populnea A.Cunn.
Hoheria populnea is an endemic New Zealand flowering tree used in Māori traditio…
long-leaved lacebark
Hoheria sexstylosa Colenso
Hoheria sexstylosa is an evergreen New Zealand-endemic flowering tree or shrub g…
large leatherroot
Hoita macrostachya (DC.) Rydb.
Hoita macrostachya is a hairy glandular perennial legume native to California an…
Holacantha emoryi A.Gray
Holacantha emoryi A.Gray
Castela emoryi, also called crucifixion thorn, is a mostly leafless desert shrub…
Yorkshire fog
Holcus lanatus L.
Holcus lanatus L. is a grass species that can be invasive, with distinct physica…
creeping velvet grass
Holcus mollis L.
Holcus mollis L. is a rhizomatous perennial grass found in woods and hedgerows, …
Chinese Hat Plant
Holmskioldia sanguinea Retz.
Holmskioldia is a monotypic Lamiaceae genus containing the ornamental Chinese ha…
Heermann's tarweed
Holocarpha heermannii (Greene) D.D.Keck
Holocarpha heermannii is an annual herb native to central and southern Californi…
Pit-gland Tarweed
Holocarpha virgata (A.Gray) D.D.Keck
Holocarpha virgata is an annual herb endemic to California, with yellow flower h…
