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DescriptionErect, annual or briefly perennial, herbs, shrubs or small trees. Indumentum simple. Stipules and stipels usually present. Leaves paripinnate. Leaflets opposite or subopposite. Flowers in axillary racemes. Calyx campanulate, teeth subequal, shorter than tube. Corolla glabrous, the standard petal with variously shaped appendages. Stamens diadelphous, 1 free, the others with filaments which are joined below to form a sheath (the filament sheath) which encloses the style, and which are free above. Pod usually long, dehiscent, beaked, sometimes winged, transversely septate.