Plants — 23,508 Species
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All Plants Species
little hulsea
Hulsea nana A.Gray
Hulsea nana is a small perennial alpine herb that produces golden single flower heads with hairy foliage.
pumice alpinegold
Hulsea vestita A.Gray
Hulsea vestita A.Gray is a daisy-like perennial herb with several distinct subspecies native to western North America.
common hops
Humulus lupulus L.
Humulus lupulus L., common hop, is a perennial dioecious climbing plant whose female strobili are known as hops.
Japanese Hops
Humulus scandens (Lour.) Merr.
Humulus scandens, also called Japanese hop, is an Asian native invasive plant in North America with limited traditional uses.
shining firmoss
Huperzia lucidula (Michx.) Trevis.
Huperzia lucidula, or shining firmoss, is an evergreen clubmoss native to eastern North America that grows in moist acidic forests.
northern firmoss
Huperzia selago (L.) Bernh.
Huperzia selago is a toxic circumpolar clubmoss with traditional uses in multiple indigenous medical practices.
Sandbox Tree
Hura crepitans L.
Hura crepitans (sandbox tree) is a toxic tropical tree famous for its exploding seed pods.
Hura polyandra Baill.
Hura polyandra Baill.
Hura polyandra Baill. is a Latin American tree species assessed as Least Concern by the IUCN in 2019.
Spanish Bluebell
Hyacinthoides hispanica (Mill.) Rothm.
Hyacinthoides hispanica, the Spanish bluebell, is a bulbous plant that hybridizes with native common bluebells in the UK.
bluebell
Hyacinthoides non-scripta (L.) Chouard ex Rothm.
Hyacinthoides non-scripta, the common bluebell, is a bulbous perennial native to western Atlantic Europe, with a history of human uses and noted toxicity.
Hyacinth
Hyacinthus orientalis L.
Hyacinthus orientalis L. is a widely cultivated fragrant bulbous ornamental spring-flowering toxic plant native to the Mediterranean.
wild hydrangea
Hydrangea arborescens L.
Hydrangea arborescens (smooth hydrangea) is a deciduous North American shrub grown ornamentally and used in traditional medicine.
rough-leaved hydrangea
Hydrangea aspera Buch.-Ham. ex D.Don
Hydrangea aspera is a variable hydrangea species cultivated ornamentally, with flower color affected by soil pH and aluminum content.
Chinese Hydrangea
Hydrangea chinensis Maxim.
Hydrangea chinensis Maxim. is a flowering shrub native to parts of East and Southeast Asia, growing in forests at 300–2000 m elevation.
Hydrangea integrifolia Hayata
Hydrangea integrifolia Hayata
Hydrangea integrifolia Hayata is a climbing ornamental hydrangea that tolerates salt and shade, bearing small white June blooms.
mophead hydrangea
Hydrangea macrophylla (Thunb.) Ser.
Hydrangea macrophylla is a Japanese ornamental shrub with many cultivated varieties, with various studied medicinal uses.
oakleaf hydrangea
Hydrangea quercifolia Bartram
Hydrangea quercifolia Bartram, oakleaf hydrangea, is a deciduous shrub native to the southeastern US, widely cultivated as an ornamental.
Goldenseal
Hydrastis canadensis L.
Hydrastis canadensis (goldenseal) is a North American forest perennial with documented toxicity and no supported medicinal uses.
Hydrilla
Hydrilla verticillata (L.f.) Royle
Hydrilla verticillata is an aquatic macrophyte with both beneficial and harmful ecosystem effects, requiring accurate identification for management.
European Frog-bit
Hydrocharis morsus-ranae L.
Hydrocharis morsus-ranae, or European frog-bit, is a floating aquatic plant native to Eurasia that is invasive in parts of North America.
Hydrocharis spongia Bosc
Hydrocharis spongia Bosc
Hydrocharis spongia is a floating or emersed aquatic flowering plant native to central and southeastern US.
American Water-pennywort
Hydrocotyle americana L.
Hydrocotyle americana is a small sprawling perennial herb that grows in moist habitats across North America, becoming rarer further south.
largeleaf pennywort
Hydrocotyle bonariensis Comm. ex Lam.
Hydrocotyle bonariensis, or Dollar Weed, is a flowering plant with creeping stems that grows in sandy coastal habitats across multiple global regions.
forest pennywort
Hydrocotyle geraniifolia F.Muell.
Hydrocotyle geraniifolia, or forest pennywort, is an Australian Hydrocotyle that grows on moist forest hill floors.
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