Herbs perennial, 10--15 cm tall. Stems caespitose, nearly prostrate, slender, simple, pubescent or glabrous. Leaves linear, 2--3.5 cm × 1.5--2.5 mm, margin ciliate, midvein prominent, margin obscurely dentate at base, apex acuminate. Flower solitary, terminal, slightly nutant. Pedicel 6--8 mm, densely pubescent; bracts lanceolate, 1--1.4 cm × ca. 2 mm, glandular. Calyx campanulate, ca. 15 × 5--7 mm, hairy at veins; calyx teeth narrowly triangular, 3--4 mm, margin ciliate, apex acute. Androgynophore 2--3 mm, pubescent. Petals 1.5--2 cm; claws saccate-oblanceolate, eciliate; auricles orbicular, sometimes obscurely laciniate; limbs exserted beyond calyx, white, obovate, 4--6 mm, shallowly furcately bifid; lobes narrowly elliptic or ovate, sometimes with one obscure obtuse tooth on each lateral side; coronal scales flabellate, ca. 1 mm, laciniate at apex. Stamens included; filaments glabrous. Styles 3, slightly exserted. Capsule narrowly ovoid, 8--10 mm. Seeds reniform, with a marginal rim of spinose processes. Fl. Jun--Jul, fr. Sep--Oct.
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