HABIT	VIGOROUS, TRAILING, TWINING AND CLIMBING PERENNIAL HERB.
STEMS	VERY LEAFY AND SLIGHTLY HAIRY
LEAVES	TRIFOLIATE; LEAFLETS DARK GREEN ELLIPTIC OR OVATE ELLIPTIC, OBTUSE OR SHORTLY OBTUSELY ACUMINATE, ABOUT 4 X 3.5 CM, SLIGHTLY HAIRY, ESPECIALLY ON THE LOWER SURFACE. STIPULES LONG, PERSISTENT.
FLOWERS	LARGE AND SHOWY, BORNE IN AXILLARY RACEMES. EACH FLOWER HAS TWO STRIATE BRACTEOLES. FLOWERS BRIGHT OR PALE LILAC ON EITHER SIDE OF A MEDIAN GREENISH-YELLOW BAND WITH NUMEROUS DARK VIOLET STRIPES OR BLOTCHES.
FRUITS	POD LINEAR WITH PROMINENT MARGINS, 7.5 TO 15 CM LONG, FLAT, THICK, STRAIGHT OR SLIGHTLY TWISTED, ACUMINATE, DARK BROWN WHEN RIPE, CONTAINING UP TO 20 SEEDS.
SEEDS	SHORTLY OBLONG TO SQUARISH WITH ROUNDED CORNERS, 4-5 X 3-4 MM, BROWNISH-BLACK, MOTTLED DARKER BLOTCHES.