Carina acuminata, longitudine alarum.
Stamina. Filamenta decem, connata, assurgentia, linea dorsali fissa basique hiante. Antheræ simplices.
Pistillum. Germen oblongum, reflexum, hirsutum. Stylus simplex, infractus, assurgens. Stigma obtusum.
Pericarpium. Legumen breve, turgidum, uniloculare, bivalve, pedicillatum.
Semen aliquot, globosa-reniformia.
Empalement. Cup three-parted, large, rather shorter than the blossom; the two superior segments lance-shaped, laying on the standard; the third lance-shaped, concave, supporting the keel, three-cleft.
Blossom butterfly-shaped.
Standard heart-shaped, acute, large, depressed on the sides.
Wings egg-shaped, half the length of the standard.
Keel tapered, the length of the wings.