Oxalis disticha Jacq.

An entirely glabrous water plant. Bulb oblong-conical, 3-4 cm long, the outer tunics dark brown, often splitting longitudinally, the inner shining, orange-brown. Rhizome 4-8 cm long, with a tunicaceous cortex. Stem submerged, somewhat flexuous, rather thick, up to 40 cm long, often branching, with large amplexicaul membranous scales on the lower part. Leaves often 6-10, cauline, distichous, alternate, the lower distant, the upper somewhat congested; petioles 2-5 cm long, terete above, amplexicaul, broadly stipule-winged, membranous and scale-like below the articulation; leaflets shortly petiolulate, rather broadly obcordate, not deeply incised 0.6-1.3 cm long, 0.5-1.2 cm broad, somewhat cartilaginous at the margin, rather inconspicuously punctate with small brown calli. Peduncles 1-fld., erect, axillary on the upper part of the stem, as long or longer than the leaves, with 2 broadly lanceolate bracts inbricating the calyx and about half its length. Sepals oblong or ovate-oblong, obtuse, or sometimes emarginate, 5-8 mm long. Corolla 1.8-2.2 cm long, yellow, with a very broadly campanulate tube; petals very broadly cuneate-obovate, with a very short broad claw, often retuse at the apex. Filaments the shorter 2-4-mm, the longer 4-7 mm long, glabrous or sparsely glandular-pilose, with broad thick rather acute projecting teeth. Ovary chambers 1-2 ovuled; styles very sparsely glandular near the base. Seeds without endosperm.