or annual, herbs or twining shrubs. Leaves pinnately trifoliolate, stipules
deciduous, stipels subulate. Flowers purple, red or greenish, fasciculately
racemes bracts deciduous, bracteoles small. Sepals 5, connate in wide tube,
lowest long. Petals exserted, standard shorter than wings, auriculate at base,
wings oblong adnate to keels, keels as long as or exceeding wings, incurved,
acute. Stamens 10, vexillary filaments free, alternately longer and shorter.
Ovary sessile, few to many-ovuled, beardless, stigmas terminal, capitate. Fruits
thickly leathery, externally variously winged or smooth, septate within or
occluded. Seeds orbicular.