Aquatic. Rhizoids apparently absent. Stolons filiform, terete, glabrous, up to 60 cm long, unbranched. Foliar organs numerous and conspicuous, 2-3 cm long, primary segments 3 or more, semi-verticillate, filiform, each dichotomously repeatedly divided from near the base into numerous segments, ultimate segments capillary, terete, minutely setulose; stipule-like clusters of short hyaline flattened densely setulose segments usually present at the base of the primary segments. Traps usually numerous, lateral on the intermediate segments, obliquely ovoid, 1-3 mm long, shortly stalked, mouth lateral, apparently without appendages. Inflorescence erect, 4-15 cm long, peduncle filiform, terete with a whorl of 4-6 spongy floats approximately midway, floats ellipsoid, 10-20 mm long, shortly stipitate, with capillary foliar segments at the apex and laterally and more numerous at the base; flowers 2-14, rather congested; scales absent; bracts transversely elliptic when flattened, cucullate, amplexicaule, hyaline, nerveless, 2.5-3 mm long, apex ± deeply denticulate-laciniate; bracteoles absent. Calyx lobes unequal, connate, scarcely accrescent, upper broadly ovate, c. 2 mm long, cucullate, apex rounded, lower about as long but broader ± orbicular, apex emarginate. Corolla yellow with pink nerves on the palate and spur, 6-9 mm long, glabrous, upper lip oblong, cucullate, much longer than upper calyx lobe, lower lip shorter, transversely oblong, apex emarginate, palate raised, gibbous, spur broadly conical, slightly curved, apex rounded, about as long as lower lip. Filaments falcate, c. 2 mm long, some-what expanded above, anther thecae subdistinct. Ovary globose, style distinct, stigma lower lip quadrate, reflexed, upper lip very short, emarginate. Capsule globose, 3-4 mm long, circumscissile. Seeds few, thinly lenticular, 1.5-2 mm ø including a distinct narrow hyaline wing, testa thin with small conspicuous reticulation.
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