HABIT	A PERENNIAL TWINING HERB.
STEMS	UP TO 4 M OR MORE, COVERED IN SOFT HAIRS.
LEAVES	THIN, BROADLY OVATE, HEART-SHAPED OR NEARLY CIRCULAR, HAIRLESS ABOVE, VELVETY BENEATH.
FLOWERS	GREENISH YELLOW OR DULL WHITE, AND SWEETSCENTED, BORNE IN LATERAL CYMES WHICH ARE AT FIRST CORYMB-LIKE, AFTERWARDS RACEME-LIKE.
FRUITS	A FOLLICLE, WITH SOFT SPINES ALL OVER AND A LONG BEAK.
SEEDS	DENSELY VELVETY ON BOTH SIDES.