Herbs annual, 15-40 cm tall. Stem erect, branched from base, sinuate-villous below, sparsely pubescent or subglabrous above. Leaves terete, 1-1.5 cm × 1-2 mm, lower leaves densely crisped villous, upper ones glabrous, base expanded, decurrent, apex obtuse. Inflorescence terminal, spikelike, loose; bracts narrowly ovate, equaling or slightly longer than bractlets, glabrous, apex acute; bractlets broadly lanceolate, shorter than perianth, with 1 prominent vein, apex acute. Perianth (including wings) 10-12 mm in diam. in fruit; segments lanceolate, membranous, glabrous, abaxially winged from proximal middle part in fruit; portion of segment above wing connivent with others into a cone, submembranous distally, glabrous, apex acuminate; 3 wings yellow-brown, semiorbicular; other 2 wings narrower. Anther appendage yellow, vesicular, ovate, 1/3-1/2 as long as anther. Stigmas filiform-subulate, 2-3 × as long as style. Seed horizontal. Fl. Jul-Aug, fr. Aug-Sep.
Home