A herb with a creeping rhizome, quadrifoliolate leaves and bean-shaped sporocarps. Rhizome 0.4-0.8 mm thick, green to light brown, densely covered with tan hairs at apices but glabrate proximally, sometimes bearing short branches with numerous leaves at nodes, nodal and internodal roots 0.1-0.3 mm thick, internodes 1-3.5 cm long; rhizome in water 0.5-0.8 mm tick, green to brown, glabrous, internodes 4-11 cm long. Land leaves with erect terete petioles 5-13 cm long, 0.4-0.8 mm thick, leaflets 1.2-2 cm long, 0.8-1.7 cm wide, cuneate to flabellate, glabrous to sparsely hairy, with concave, straight, or convex lateral margins and entire to crenulate terminal margins; leaves in water often with leaflets emergent rather than floating, with stiff terete petioles 13.5-47 cm long, 0.3-0.8 mm thick, leaflets 1.7-1.8 cm long, 1.5-1.6 cm wide; hydropoten infrequent.

PIER

Sharma PV. Classical Uses of Medicinal Plants.