Sesbania tomentosa
| Sesbania | |
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| File:Sesbania tomentosa.jpg | |
| Sesbania tomentosa | |
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| Species: | S. tomentosa
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| Binomial name | |
| Sesbania tomentosa | |
Sesbania tomentosa or ‘ohai is an endangered species of Sesbania endemic to the main Hawaiian Islands and Nihoa and Necker Island. Off-road vehicles, fires, grazing, and alien species competition have destroyed their habitat on the main islands, but they are still quite common on Nihoa and Necker. Atleast 2000 specimens grow on Nihoa, while Necker doesn't have nearly as many.
‘Ohai grows from sea level to elevations of 2700 feet. Over its wide range of habitats, it exhibits a broad variation of color and shape. Plants that grow on Nihoa have reddish-orange flowers and young leaflets that are relatively hairless. Necker plants have salmon to orange colored-flowers, and leaflets that are very hairy. On Molokai, there is even a from that grows as a standing tree.