Aquatic or semi-aquatic, glabrous herb with long, floating or trailing stems rooting at nodes, side-branches short, erect. Leaves few, emergent, narrowly linear, 50-250 x 1-3,5 mm, sheath up to 30 mm long, striate. Spathes usually solitary, terminal, peduncuÂlate, folded, 10-20 mm long, straight or falÂcate, acute to acuminate, striate. Cymes with upper exserted, 1-flowered, lower c. 4-flowered, shortly exserted at anthesis. FlowÂers small with petals long-clawed, c. 15 mm long (in dried flowers), pale mauve, blue or white. Stamens with 3 lower fertile; stami-nodes 3, shorter. Ovary 5-ovuled; style c. 12 mm long. Capsule oblong-apiculate, up to 7 mm long 2(-4?)-seeded; seeds greyish brown, usually ellipsoid, 2-3 mm long, irregularly foveolate.
