Psophocarpus Neck. ex Dc.

Herbs or subshrubs, mostly climbing or prostrate, less often erect. Leaves 1-foliolate or pinnately 3-foliolate; stipules prolonged below the point of insertion; stipels present. Inflorescences axillary, falsely racemose or flowers solitary or fasciculate; rhachis swollen at the point of insertion of the pedicels. Calyx 5-lobed; upper pair of lobes forming an entire or bifid lip. Corolla blue or purplish; standard broad, auriculate and appendaged, glabrous; keel bent at a right-angle. Vexillary stamen free or somewhat connate in the middle; anthers 5 dorsifixed alternating with 5 basifixed. Ovary 3–8-ovuled, winged; style thickened above the ovary, bent, flattened towards the apex, glabrous, bearded longitudinally or with a ring of hairs below the stigma, that part of the style situated above this row of hairs slightly bent; stigma terminal or internal, penicillate. Pods oblong, ± distinctly 4-winged along the angles, dehiscent, ± septate between the seeds. Seeds ovoid or oblong-ellipsoid, with or without an aril.