Description from Flora of China
Annuals, terrestrial. Rhizoids and stolons capillary, branched. Traps on rhizoids, stolons, and leaves, stalked, globose, 0.5-1 mm, mouth basal; appendages 2, dorsal, simple, subulate, glandular. Leaves few to many, glabrous; leaf blade narrowly linear, 5-10 × 0.4-1 mm, membranous, vein 1, base attenuate onto petiole, margin entire, apex rounded to subacute. Inflorescences erect or twining, 1.5-35 cm, (1-)3-8-flowered, glabrous; peduncle terete but somewhat angular, 0.2-0.6 mm thick; scales few to numerous, similar to bracts; bracts basifixed, broadly ovate-deltoid, 0.5-1.5 mm, apex acute to acuminate. Pedicel suberect, 2.5-3 mm, filiform, winged; bracteoles basifixed, narrowly linear to subulate, as long as or slightly shorter than bracts, apex acute. Calyx lobes ovate to elliptic, 2-3 mm at anthesis, to 5 mm in fruit; lower lobe subequal to or slightly smaller than upper lobe, apex shortly 2-cleft; upper lobe apex acute to acuminate. Corolla yellow, 5-11 mm; lower lip suborbicular, base distinctly swollen, apex rounded to obscurely crenate; spur subulate, longer than lower corolla lip, widely divergent, curved or straight, apex acute; palate papillose; upper lip oblong, apex rounded to emarginate. Filaments ca. 1 mm, straight; anther thecae distinct. Ovary ovoid, dorsiventrally compressed; style short; stigma lower and upper lips semicircular. Capsule ovoid, 2-2.5 mm, dorsiventrally compressed, dehiscing by a longitudinal ventral slit. Seeds obliquely obovoid, 0.2-0.3 mm; seed coat with prominent elongate reticulations. Fl. Jun-Sep, fr. Jul-Oct.
Bogs, marshes, meadows, swamps, ponds, wet rocks, along streams among grass; 700-2900 m. SW Guizhou, NW and S Yunnan [Bangladesh, Bhutan, India, Indonesia (Papua Barat), Laos, Malaysia, Myanmar, Nepal, Papua New Guinea, Sri Lanka, Thailand, Vietnam; Africa, N Australia, Madagascar].