Herbs annual, glabrous. Stems solitary or tufted, 5-30 cm; branches many, decumbent. Leaves 3-6-verticillate, sessile or subsessile; leaf blade narrowly oblanceolate, 8-20 × 2-4 mm, base attenuate, apex acute. Cymes terminal and axillary, long pedunculate basally on rachis, paniculiform or corymbiform, few flowered. Flowers unequally 5-merous; pedicel slender, 5-8 mm. Sepals narrowly triangular to ovate-lanceolate, 1-1.5 mm, apex subacute. Petals white, lanceolate-ovate, 2-3 mm, apex acute. Stamens 10, shorter than petals. Nectar scales broadly spatulate, ca. 0.5 mm, apex emarginate. Carpels suberect, ellipsoid, minutely mammillate, base connate. Follicles divergent when mature. Seeds ovoid. Fl. May-Jun, fr. Aug-Sep.
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