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Oahu riverhemp

Sesbania tomentosa

Also called Oʻahu riverhemp, `ohai, 'ōhai

Oahu riverhemp
Photo: Forest & Kim Starr, CC BY 3.0
Family
Fabaceae (Pea & bean family)
Grows as
Shrub
Native range
Hawaiian Is.
Climate
seasonally dry tropical

About

Sesbania tomentosa, commonly known as Oahu riverhemp and ʻōhai, is an endangered species of plant in the pea family, Fabaceae, that is endemic to the main Hawaiian Islands as well as Nīhoa and Necker Island. It inhabits low shrublands and, rarely, dry forests, at elevations from sea level to 2,500 ft (760 m). Associated native plant species include ʻakiʻaki (Sporobolus virginicus), ʻilima (Sida fallax), naupaka kahakai (Scaevola taccada), and pili (Heteropogon contortus). Off-road vehicles, wildfires, grazing, and alien species competition have destroyed their habitat on the main islands, but they are still quite common on Nīhoa and Necker. At least 2,000 specimens grow on Nīhoa, while there are far less on Necker.

ʻŌhai is highly polymorphic, exhibiting broad variations in color and shape.

Other Sesbania plants

Dunchi fiber · Sesbania · Sesbania chippendalei · Poisonbean · Dragon Flowertree · Vegetable hummingbird · Bigpod sesbania · Sesbania madagascariensis · Sesbania mossambicensis · Sesbania pachycarpa · Rattlebox · Sesbania rostrata

Text excerpted from the Wikipedia article Sesbania tomentosa by its contributors, under CC BY-SA 4.0; the excerpts are shared under the same licence.

Life form, climate and native range: World Checklist of Vascular Plants, Royal Botanic Gardens, Kew (CC BY 3.0), reformatted; see Plants of the World Online.

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