Explore 23,508 Species
little hulsea
Hulsea nana A.Gray
Hulsea nana is a small perennial alpine herb that produces golden single flower …
pumice alpinegold
Hulsea vestita A.Gray
Hulsea vestita A.Gray is a daisy-like perennial herb with several distinct subsp…
common hops
Humulus lupulus L.
Humulus lupulus L., common hop, is a perennial dioecious climbing plant whose fe…
Japanese Hops
Humulus scandens (Lour.) Merr.
Humulus scandens, also called Japanese hop, is an Asian native invasive plant in…
shining firmoss
Huperzia lucidula (Michx.) Trevis.
Huperzia lucidula, or shining firmoss, is an evergreen clubmoss native to easter…
northern firmoss
Huperzia selago (L.) Bernh.
Huperzia selago is a toxic circumpolar clubmoss with traditional uses in multipl…
Sandbox Tree
Hura crepitans L.
Hura crepitans (sandbox tree) is a toxic tropical tree famous for its exploding …
Hura polyandra Baill.
Hura polyandra Baill.
Hura polyandra Baill. is a Latin American tree species assessed as Least Concern…
Spanish Bluebell
Hyacinthoides hispanica (Mill.) Rothm.
Hyacinthoides hispanica, the Spanish bluebell, is a bulbous plant that hybridize…
bluebell
Hyacinthoides non-scripta (L.) Chouard ex Rothm.
Hyacinthoides non-scripta, the common bluebell, is a bulbous perennial native to…
Hyacinth
Hyacinthus orientalis L.
Hyacinthus orientalis L. is a widely cultivated fragrant bulbous ornamental spri…
wild hydrangea
Hydrangea arborescens L.
Hydrangea arborescens (smooth hydrangea) is a deciduous North American shrub gro…
rough-leaved hydrangea
Hydrangea aspera Buch.-Ham. ex D.Don
Hydrangea aspera is a variable hydrangea species cultivated ornamentally, with f…
Chinese Hydrangea
Hydrangea chinensis Maxim.
Hydrangea chinensis Maxim. is a flowering shrub native to parts of East and Sout…
Hydrangea integrifolia Hayata
Hydrangea integrifolia Hayata
Hydrangea integrifolia Hayata is a climbing ornamental hydrangea that tolerates …
mophead hydrangea
Hydrangea macrophylla (Thunb.) Ser.
Hydrangea macrophylla is a Japanese ornamental shrub with many cultivated variet…
oakleaf hydrangea
Hydrangea quercifolia Bartram
Hydrangea quercifolia Bartram, oakleaf hydrangea, is a deciduous shrub native to…
Goldenseal
Hydrastis canadensis L.
Hydrastis canadensis (goldenseal) is a North American forest perennial with docu…
Hydrilla
Hydrilla verticillata (L.f.) Royle
Hydrilla verticillata is an aquatic macrophyte with both beneficial and harmful …
European Frog-bit
Hydrocharis morsus-ranae L.
Hydrocharis morsus-ranae, or European frog-bit, is a floating aquatic plant nati…
Hydrocharis spongia Bosc
Hydrocharis spongia Bosc
Hydrocharis spongia is a floating or emersed aquatic flowering plant native to c…
American Water-pennywort
Hydrocotyle americana L.
Hydrocotyle americana is a small sprawling perennial herb that grows in moist ha…
largeleaf pennywort
Hydrocotyle bonariensis Comm. ex Lam.
Hydrocotyle bonariensis, or Dollar Weed, is a flowering plant with creeping stem…
forest pennywort
Hydrocotyle geraniifolia F.Muell.
Hydrocotyle geraniifolia, or forest pennywort, is an Australian Hydrocotyle that…
