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Herbs with imparipinnate leaves, related to Colutea, but differing in having a tuft of hairs below the terminal capitate stigma. Pod membranaceous, somewhat inflated or flat, the upper suture not impressed.
Pod oblong or linear, membranaceous, somewhat inflated or compressed, the upper suture not impressed, at length dehiscing at the apex.
Ovary sessile or stipitate, 2–many-ovuled; style filiform, incurved, with a tuft of hairs below the terminal capitate stigma.
Stamens in a sheath open on the upper side; vexillary stamen free; anthers uniform.
Flowers in pedunculate axillary racemes, rarely solitary, terminal, bracteate.
Perennial or rarely annual herbs, subshrubs or shrubs, rarely spinescent.
Calyx campanulate, 5-lobed; lobes small, subequal.
Leaves imparipinnate, with small stipules.
Seeds reniform on a filiform funicle.
