Vexillum subrotundum, emarginatum, assurgens.
Alœ lunulatæ, obtusæ, parvæ.
Carina dipetala, lunulata, obtusa.
Stamina. Filamenta diadelpha (simplex setaceum et novem coalita), adscendentia. Antheræ subrotundæ.
Pistillum. Germen lineare. Stylus subulatus, adscendens, longitudine staminum. Stigma obtusum.
Pericarpium. Legumen longitudine calycis, compressum, adscendens, acuminatum.
Semen unicum, reniforme.
Empalement. Cup one leaf, dotted over with small tubercles, and five-cleft; the segments equal and remaining, the lower one twice the length of the others.
Blossom butterfly-shaped, five petalled.
Standard nearly round, notched at the end, turned upwards.