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Sesbania tomentosa, commonly known as Ōhai, is an endangered species of flowering plant in the pea family, Fabaceae, that is endemic to the main Hawaiian Islands as well as Nihoa and Necker Island. It inhabits low shrublands and, rarely, dry forests,<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> at elevations from sea level to {{safesubst:#invoke:convert|convert}}.<ref name="Bishop">{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> Associated native plant species include aki (Sporobolus virginicus), ilima (Sida fallax), naupaka kahakai (Scaevola taccada), and pili (Heteropogon contortus).<ref name="CPC"/> Off-road vehicles, wildfires, grazing, and alien species competition have destroyed their habitat on the main islands, but they are still quite common on Nihoa and Necker. At least 2000 specimens grow on Nihoa, while there are far less on Necker.

Ōhai is highly polymorphic, exhibiting broad variations in 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. A form that grows as a standing tree exists on [[Molokai|Moloka]]. Ōhai grows as a prostrate shrub with semi-glaucous leaves devoid of tomentum on the southernmost tip of the [[Hawaii (island)|island of Hawai]], Ka Lae.


Sesbania tomentosa sections
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Okina::title    Hawaiian::necker    Sesbania::nihoa    Bishop::hawaii    Museum::plant    Species::category

{{#invoke:Italic title|main}}

Sesbania tomentosa, commonly known as Ōhai, is an endangered species of flowering plant in the pea family, Fabaceae, that is endemic to the main Hawaiian Islands as well as Nihoa and Necker Island. It inhabits low shrublands and, rarely, dry forests,<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> at elevations from sea level to {{safesubst:#invoke:convert|convert}}.<ref name="Bishop">{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> Associated native plant species include aki (Sporobolus virginicus), ilima (Sida fallax), naupaka kahakai (Scaevola taccada), and pili (Heteropogon contortus).<ref name="CPC"/> Off-road vehicles, wildfires, grazing, and alien species competition have destroyed their habitat on the main islands, but they are still quite common on Nihoa and Necker. At least 2000 specimens grow on Nihoa, while there are far less on Necker.

Ōhai is highly polymorphic, exhibiting broad variations in 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. A form that grows as a standing tree exists on [[Molokai|Moloka]]. Ōhai grows as a prostrate shrub with semi-glaucous leaves devoid of tomentum on the southernmost tip of the [[Hawaii (island)|island of Hawai]], Ka Lae.


Sesbania tomentosa sections
Intro  References  External links  

PREVIOUS: IntroNEXT: References
<<>>