Blue Desmodium is a shrub, 1.8-2.4 m tall, branches
drooping, hairless or velvety, purplish brown. Leaf are trifoliolate,
carried on 1.2-2.5 cm long stalks. Leaflets are 5-7.5 cm long, 2.5-3.0
cm broad, elliptic-oblong, rounded at both ends, mucronate, finely
velvety on both sides. Stipules are 7.5-12.5 mm long. Flowers are borne
in long drooping racemes in leaf axils or at branch ends. Bracts are
6-7 mm long, ciliate. Flower-stalks are 0.7-1.3 cm long. Sepal cup us
2.5-3.0 mm long, teeth as long as the tube. Flowers are 7.5-8.0 mm
long, dark blue. Fruit is 12.5-18.5 cm long, about 2.5 mm broad,
stipitate, upper suture wavy, lower deeply indented between the seeds,
articles 2.5-3.0 mm long, pubescent, 1-6-seeded. Blue Desmodium is
found in Pakistan, Kashmir, Punjab, Kumaon, Bengal, Nepal and Sikkim.
Flowering: September-November.