East-Himalayan Derris is a large climber or a climbing
shrub, with branchlets hairless or very sparsely hairy. Leaves are
5-9-foliolate; axis 30-45 cm, including leaf-stalk 8-14 cm; leaflet
blades oblong to oblong-lanceolate, 10-15 x 3.5-7 cm, subleathery,
both surfaces hairless, secondary veins 5-7 on each side of midvein,
base rounded, tip shortly tapering to sometimes blunt. Flowers are
borne in false panicles in leaf-axils or at branch-ends, narrowly
pyramidal, 12-35 cm, compact, brown or reddish hairy; branches
numerous, rising up or spreading; branchlet nodes with several close
but not fascicled flowers on a short branchlet. Flower-stalks are very
short. Flowers are about 8 mm. Sepal-cup is bell-shaped, about 3 mm,
very sparsely hairy, tip flat or obscurely deltoid toothed. Flowers are
whitish to purplish red, 8-10 mm; standard round, with calluses
heart-shaped at base, notched at tip. Ovary hairy. Legume oblong, 5-10
× 2.5-3(-4) cm, thin, hairless, with prominent netveined veins; both
sutures with a 3-8 mm wide wing. Seeds 1-3 per legume,
oblong-kidney-shaped. East-Himalayan Derris is found in East Himalaya
to China, and SE Asia, at altitudes of 2000 m. Flowering: May-June.
Identification credit: M. Sawmliana
Photographed in Ailawng area, Mizoram.
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The flower labeled East-Himalayan Derris is ...