Plants annual. Taproots filiform. Stems erect, green or reddish purple, (5-)8-20(-25) cm, gla-brous, internodes of all stems 5-7 times as long as leaves. Leaves not overlapping, connate proxi-mally, with loose, scarious sheath 0.1-0.3 mm; blade green or reddish purple, 3-veined proxi-mally, midvein prominent abaxially, lateral veins 0.2-0.25 times as long as blade, straight to outwardly curved, flat, lance-attenuate to linear, 2-7(-9) × 0.5-1.2(-1.8) mm, flexuous, margins not thickened, scarious proximally, smooth, apex green or purple, rounded to acute, often mucronate, shiny, glabrous; axillary leaves occasionally present. Inflorescences 5-20-flowered, open cymes; bracts subulate, herbaceous, often scarious-margined proximally. Pedicels (0.7-)1-3(-3.5) cm, glabrous. Flowers: hypanthium disc-shaped; sepals strongly 3(-5)-veined, lance-linear to lanceolate (herbaceous portion narrowly lanceolate to lance-oblong), 3.2-5.5 mm, not enlarging in fruit, apex green to purple, acute, not hooded, glabrous; petals oblanceolate to oblong-elliptic, 1-1.5 times as long as sepals, apex obtuse to rounded, entire. Capsules on stipe about 0.2 mm, ± ovoid, 3.5-5.8 mm, equaling or longer than sepals. Seeds brown or reddish, asymmetically reniform with radicle prolonged into beak, not compressed, 0.7-1 mm, minutely papillate.