Flora of the Hawaiian Islands
Dicotyledon Literature for Sesbania tomentosa
Wagner et al., 1990, 1999.
   Fabaceae -- The Pea Family Bibliography
      Sesbania tomentosa

Common name(s): `ohai
General Information
DistributionIn the Hawaiian Islands, endemic to Necker, Nihoa, Ni`ihau, Kaua`i, O`ahu, Moloka`i, Lana`i, Maui, Kaho`olawe, Hawai`i.

Click here for detailed USGS map by Jonathan Price
Shrubs with decumbent or sprawling branches up to 14 m long, sometimes small erect trees 2.5-6 m tall, densely silky villous, the hairs somewhat spreading, especially on young growth, often appressed on older stems.
Leaflets (12-)18-38, oblong-elliptic to narrowly elliptic, 15-38 mm long, 5-18 mm wide, densely to sparsely silky strigose, sometimes glabrate, especially upper surface, or even glabrous, apex rounded, subtruncate, or weakly emarginate, and apiculate, base rounded to broadly cuneate, often oblique.
Flowers 2-9 in racemes 1.2-7(-11) cm long, pedicels 9-40 mm long, rachis and pedicels densely silky villous, the hairs spreading to appressed; calyx green, 7-12(-15) mm long, strigose to glabrous, pubescent along upper edge within, sinuses with 0-2 glandular appendages, lobes deltate, 1.5-4 mm long; corolla salmon tinged yellow, orangish red, or scarlet, rarely pure yellow, sometimes wings and keel darker than standard, standard 23-45 mm long, strongly reflexed, center yellow or greenish yellow, claw with a pair of callosities 0.5-3 mm long, these slightly curved or bent at right angles, or sometimes absent, wings 23-45 mm long, keel slightly shorter.
Pods 70-230 mm long, 4-6 mm wide, slightly flattened, often somewhat constricted between the seeds, indehiscent or very tardily dehiscent.
Seeds (4-)6-27, olive to pale or dark brown, oblong-ellipsoid to oblong, 4-6 mm long, 2-4 mm wide.
2n = 24*