Perennial monoecious herb. Rhizome slender, branched up to 20 cm long, 2-5 mm thick. Scaly radical leaves on the apical part of rhizome. Flowering stems 1-5 in each rosette, simple, ascending or suberect, glabrous, 7.5-25 (-30) cm high, 1-2.5 mm wide. Cauline leaves alternate, sessile, narrowly obovate to linear-obovate, entire to lobulate, glabrous, acute, 7-35 x 1.5-2 mm. Inflorescence terminal, 1-13 flowered cymes or corymb-fascicles, bracteate. Bract similar to the cauline leaves. Flowers bisexual, mostly 5-merous, hypogynous, pedicel 2-6 mm. Calyx lobes basally connate, glabrous, entire, obtuse, ovate to triangular-ovate, 3-6.5 x 1.5-2.5 mm. Petals glabrous, entire, obtuse to mucronulate, elliptic, boat-shaped, 6-13 x 2-4 mm. Stamens 10, shorter than the petals, in two whorls, basifixed, epipetalous 2.5-4 mm long, alternipetalous 5-6.5 mm long. Carpels 3.5-10 x 0.7-1.5 mm, style straight, 1.5-3.5 mm long, ovary 3-5 x 0.7-1.5 mm, ovules 12-18 per locule. Nectar scales squarish, 0.5-1 x 0.4-1.2 mm. Follicles 5-12 x 1-1.5. Seeds ellipsoid, apex elongated, 0.7-1.2 x 0.2-0.4 mm.