Root tubers globose or fusiform. Stems erect, 3--13 cm tall, slender, branched, pubescent. Leaves ovate, 3--14 × 2--8 mm, midvein prominent, both surfaces pubescent, base attenuate into a short petiole, apex acute. Chasmogamic flowers solitary, terminal; pedicel 2--4 cm, pilose; sepals 5, lanceolate, 3--4 × ca. 1 mm, abaxially pilose, margin narrowly membranous, apex acuminate; petals 5, obovate, slightly longer than sepals, margin entire or emarginate, base slightly narrowed; stamens 10, shorter than petals, anthers brown-purple; styles 2 or 3. Cleistogamic flowers 1 or 2 in proximal leaf axils; pedicel 8--10 mm, pilose; sepals 4, lanceolate; petals absent. Capsule ovoid, 2--3 mm. Seeds brown, compressed, orbicular, ca. 0.5 mm, without protuberances. Fl. May--Jun, fr. Jun--Jul.
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