Plants annual. Taproots filiform to somewhat thickened. Stems erect to widely spreading, green or purple, 4-30 cm, stipitate-glandular distally, internodes of all stems 1-5 times as long as leaves. Leaves sometimes overlapping proximally, ± evenly spaced, connate proximally, with loose, scarious sheath 0.3-0.7 mm; blade straight to variously curved or coiled, green or purple, concave, 1-3 veined, linear, 5-40 × 0.2-0.4 mm, flexuous, margins not thickened, often scarious, sometimes ciliate or stipitate-glandular, apex green to purple, acute, navicular, dull, glabrous to stipitate-glandular; axillary leaves present proximally. Inflorescences 7-15+-flowered, open cymes; bracts subulate, scarious. Pedicels 0.2-4 cm, stipitate-glandular. Flowers: hypanthium disc-shaped; sepals 1(-3)-veined, midvein often more prominent than lateral veins, ± ovate (herbaceous portion lanceolate to oblong-lanceolate to narrowly ovate), 2.5-3.7 mm, not enlarging in fruit, apex often purple, obtuse to acute, not hooded, stipitate-glandular at least proximally; petals ovate, (1-)1.7-2.1 times as long as sepals, apex broadly rounded, entire or irregularly dentate. Capsules on stipe 0.3-0.5 mm, broadly ovoid, 4 mm, longer than sepals. Seeds reddish brown, winged, orbiculate with radicle not prolonged, compressed, 1.3-2 mm, tuberculate; tubercles low, elongate.
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