Carina recta, longitudine alarum, dipetala, emarginata.
Stamina. Filamenta diadelpha, filamenta decem, inferne connata, parum incurva, longitudine dimidii vexilli, inequalia, sagittata.
Pistillum. Germen pedicellatum, subulatum, attenuatum in stylum subulatum, longitudine staminum. Stigma terminale, simplex.
Pericarpium. Legumen longissimum, ac seminis nondum tumidis acuminate terminatum, uniloculare.
Semina reniformia.
Obs. E. Herbacea staminibus decem distinctis.
Empalement. Cup one-leafed, entire and tubular, emarginated on the upper part, the part beneath with little pores containing honey.
Blossom. Butterfly-shaped.
Standard lance-shaped, bowing sideways, ascending, and very long.
Wings nearly egg-shaped and scarcely longer than the tube of the empalement, outside the standard and very small.