Herbs perennial. Stems tufted, nearly erect, quadrangular, ca. 20 cm tall, ca. 2 mm in diam., dry after anthesis, basally branched, with short branchlets and axillary leaf clusters; proximal leaves and inflorescences white papillate with stiff hairs. Leaves crowded below, distant above; leaf blade green, lanceolate-linear, ca. 1.5 cm × 1.2 mm, somewhat thick, margin erose, midvein slightly raised abaxially, impressed adaxially, apex acute. Flowers 5--16 in dichotomous cymes; branches nearly forked, sparse; bracts herbaceous, distal ones ca. 2 mm. Pedicel 0.5--1.5 cm, slender. Sepals 5, white, oblong, ca. 1.5 mm wide, glabrous or papillate-pubescent, veins 3 and dichotomously branched, margin broadly membranous, apex rounded, green; calyx ca. 9 mm in diam. Petals ca. 2/3 as long as sepals, 2-cleft to middle; lobes oblong. Stamens 10, slightly shorter than petals, inserted on carnose, semiorbicular, separated disc lobes; anthers pale yellow, nearly rectangular. Ovules few; styles 4. Capsule 4-valved. Seeds 2 or 3. Fl. Aug--Sep, fr. Sep--Oct.
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