Herbs perennial, 5--15 cm tall, glandular pubescent. Stems sparsely caespitose. Leaves ovate-lanceolate, 1--2.5 × 0.3--1 cm, both surfaces white pilose, apex acute. Flower solitary, terminal; pedicel erect, 1--3 cm. Sepals 5, oblong-elliptic or ovate-lanceolate, 7--8 × ca. 3 mm, apex acuminate. Petals white, broadly obovate, 14--16 mm, apex retuse. Styles 5. Capsule cylindric, ca. 2 × as long as calyx, 10-toothed, teeth revolute. Seeds light brown, compressed globose, tuberculate. Fl. Jul--Aug, fr. Aug--Oct.
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