Plants perennial, not matted. Taproots filiform; rhizomes slender, 15+ cm. Stems 5-15, weakly erect, green, 25-90 cm; internodes angular to grooved, 2/ 3-3 times as long as leaves, shiny, glabrous except for fine hairs at nodes. Leaves connate basally, with scarious sheath 0.2-0.5 mm, sessile; blade 1-veined (vein prominent abaxially), linear to linear-lanceolate, 20-55 × 2-7 mm, herbaceous to subsucculent, margins ± flat, scarious, shiny, ciliate, apex acute or acuminate to cuspidate, sometimes pustulate, sparsely pubescent on adaxial surface; axillary leaf clusters absent. Inflorescences axillary, solitary flowers. Pedicels reflexed in fruit, 20-50 mm, glabrous. Flowers: sepals green, obscurely 1-veined, not keeled, broadly elliptic (herbaceous portion narrowly elliptic), 2.8-3.5 mm, to ca. 4 mm in fruit, apex obtuse to rounded, not pustulate, minutely ciliate basally; petals ovate, 5-6 mm, 1 1/2-2 times as long as sepals, apex rounded. Capsules tightly enclosed by calyx, ovoid, 4 mm, ca. equaling sepals. Seeds 15-20, dark brown, reniform, compressed, 0.8-0.9 mm, shiny, smooth.
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