HABIT	A SPRAWLING VINE, ANNUAL OR PERENNIAL, CREEPING ON MUD OR FLOATING ON WATER; UP TO 3 M LONG, TO 1CM IN DIAMETER.
STEMS	TERETE, BRANCHED, HOLLOW AND SUCCULENT WHEN FLOATING, OTHERWISE SOLID AND FIRM.
LEAVES	EMERSED, GLABROUS, ALTERNATE; PETIOLES SUCCULENT WHEN GROWN IN WATER, 3-20 CM LONG; BLADES GREENISH-BROWN, TRIANGULAR, OVATE, LANCEOLATE, OR LINEAR, ENTIRE TO DENTATE, 3-15 CM LONG, 1-12 CM ACROSS, BASES TRUNCATE, CORDATE, HASTATE, OR SAGITTATE, LOBES ROUNDED TO ACUTE, ENTIRE TO DENTATE.
FLOWERS	INFLORESCENCES AXILLARY CYMES, WITH ONE TO A FEW FLOWERS; PEDUNCLES 0.5-18 CM LONG. FLOWERS PERFECT, HYPOGENOUS, LARGE AND SHOWY, FUNNEL SHAPED, GLABROUS, PINK, OFTEN WITH DARKER EYE, SOMETIMES WHITE OR CREAM.
FRUITS	A CAPSULE, GLABROUS, GLOBOSE TO OVOID, 8-10 MM LONG.
SEEDS	BROWN OR BLACK, MOSTLY PUBESCENT, 3-RANKED, ROUNDED ON BACK, ABOUT 5 MM LONG, ABOUT 4 MM WIDE.