HABIT	A FREE-FLOATING OR PARTLY ROOTING PERENNIAL AQUATIC HERB.
STEMS	WITH NUMEROUS, LONG, FIBROUS ROOTS, SHORT LEAFY.
LEAVES	IN ROSETTES, SPOON OR PADDLE-SHAPED, APEX ROUNDED, 5-20 CM WIDE; PETIOLES TURBINATELY SWOLLEN AND SPONGY, ENABLING THE PLANT TO FLOAT.
FLOWERS	MAUVE, LILAC OR BLUE, FUNNEL-SHAPED, 2.5-3.8 CM LONG.
FRUITS	CAPSULE, MANY-SEEDED.