Kingdom

Plants — 23,508 Species

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All Plants Species

Sea Sacks

Halosaccion glandiforme (S.G.Gmelin) Ruprecht

Halosaccion glandiforme, or sea sac, is a north Pacific intertidal alga with a hollow thallus adapted to changing tides.

Amaranthaceae

Haloxylon salicornicum (Moq.) Bunge ex Boiss.

Haloxylon salicornicum is a small, almost leafless arid-region shrub with scaly growth and short flower spikes.

Hamamelidaceae

american witch-hazel

Hamamelis virginiana L.

Hamamelis virginiana (witch hazel) is a small deciduous tree/shrub with a long history of medicinal uses.

Rubiaceae

Firebush

Hamelia patens Jacq.

Hamelia patens is an American native Rubiaceae shrub or small tree, valued for attracting wildlife and used in food and folk medicine.

Orchidaceae

bog adder's-mouth orchid

Hammarbya paludosa (L.) Kuntze

Hammarbya paludosa is a small Northern Hemisphere orchid that grows in bog habitats and bears unusual non-resupinate flowers.

Apiaceae

Whiskbroom Parsley

Harbouria trachypleura (A.Gray) J.M.Coult. & Rose

Harbouria trachypleura is the only species in the monotypic Apiaceae genus Harbouria, native to three western U.S. states.

Fabaceae

Native wisteria

Hardenbergia comptoniana (Andrews) Benth.

Hardenbergia comptoniana is a vigorous Australian twining vine grown in horticulture for its varied colored pea flowers.

Fabaceae

False Sarsaparilla

Hardenbergia violacea (Schneev.) Stearn

Hardenbergia violacea is an Australian climbing sub-shrub that is widely cultivated as a garden plant.

Polygonaceae

Baja Balloon Pod

Harfordia macroptera Greene & Parry

Harfordia macroptera is a shrub or subshrub defined by its conspicuous inflated sac-like bracts that aid wind dispersal of achenes.

Boraginaceae

Palmer's grapplinghook

Harpagonella palmeri A.Gray

Harpagonella is a North American borage genus of small annuals, known for its distinctive hooked spiny fruit.

Pedaliaceae

Kalahari Devilclaw

Harpagophytum procumbens (Burch.) DC. ex Meisn.

Harpagophytum procumbens, commonly devil's claw, is a southern African plant used in folk medicine for pain, with regulated sustainable harvest.

Pedaliaceae

Savanna Devilclaw

Harpagophytum zeyheri Decne.

Harpagophytum zeyheri is a southern African devil's claw species, with folk medicinal use of the genus, and sustainable harvest regulations in place.

Ericaceae

Moss Bell-heather

Harrimanella hypnoides (L.) Coville

Harrimanella hypnoides, or moss bell heather, is the only species in the Harrimanella genus, a low cushion-forming cold hardy heath found in arctic and northern mountain regions.

Asphodelaceae

Spiderweb Haworthia

Haworthia arachnoidea (L.) Duval

Haworthia arachnoidea is a variable South African succulent with dark bristled-leaved rosettes, that contracts in dry summers.

Asteraceae

Barberry-leaf Goldenbush

Hazardia berberidis (A.Gray) Greene

Hazardia berberidis is a woody shrub endemic to Baja California, with uncertain native status in California’s San Diego County.

Asteraceae

saw-toothed goldenbush

Hazardia squarrosa (Hook. & Arn.) Greene

Sawtooth goldenbush (Hazardia squarrosa) is a North American Asteraceae shrub native to California and Baja California.

Scrophulariaceae

Beach Slugwort

Hebenstretia cordata L.

Hebenstretia cordata, or beach slugwort, is a flowering plant species in the family Scrophulariaceae.

Bromeliaceae

Guapilla

Hechtia glomerata Zucc.

Guapilla (Hechtia glomerata Zucc.) is a bromeliad species native to southern Texas, Mexico, and Guatemala.

Bromeliaceae

Texas False Agave

Hechtia texensis S.Watson

Hechtia texensis, or Texas false agave, is a native bromeliad found in Texas US and northeastern Mexico.

Lamiaceae

American pennyroyal

Hedeoma pulegioides (L.) Pers.

Hedeoma pulegioides is an aromatic annual mint relative native to eastern North America, with traditional and current insect repellent and medicinal uses.