A floating, aquatic herb. Stolons long, branched, slender, glabrous. Leaves all alike, 5–6 lin. apart, 6–9 lin. long, usually 2-partite from or near the base, dichotomously multifid; segments somewhat widened towards the forkings, ultimate segments capillary, rarely more than 1 1/2 lin. long, minutely setulose. Bladders conspicuous, numerous, up to 8 on a leaf, usually from the forks of the leaf-divisions, very obliquely ovoid, up to 2 lin. long, dark-green, mouth sublateral, oblique with 2 fine entire filiform tentacles; stalk very short, more or less lateral. Scapes lateral, 1 1/2–2 in. long, slender, 2-flowered; bract broad-ovate to rotundate, 1 lin. long; bracteoles 0; pedicels slender, erect in flower, at length recurved and up to 10 lin. long. Sepals equal, broad-ovate to rotundate, 1 lin. long, the lower often emarginate. Corolla yellow (Barter), not known to me. Pistil ovoid passing gradually into the short style; upper stigmatic lip obscure; lower broad-ovate. Capsule ovoid-ellipsoid, over 3/4 lin. long. Seeds disc-shaped, more or less pentagonal, 1/3– 3/8 lin. in diam. with a broad wing all round; testa and wing reticulate. Embryo lenticular, about 1/6 lin. in diam.
