Herbs perennial, less than 10 cm tall. Stems several, cespitose, not branched, densely short appressed pubescent, persistent withered leaves and persistent branches at base. Petiole of basal leaves 2-5 cm; leaf blade ovate-lanceolate to ovate-elliptic, 1.5-4.5 cm × 5-12 mm, short appressed pubescent, base broadly cuneate, apex acuminate to acute; stem leaves 3-6, petiolate below, ± sessile above, 2 leaves of contiguous inflorescences subopposite, becoming involucral. Inflorescences 2 or 3, terminal, 1-4 cm. Pedicel 0.5-1 mm, sparsely pubescent. Calyx lobes linear to linear-lanceolate, 2-2.5 mm, slightly enlarged in fruit, appressed pubescent outside, with few short hairs inside. Corolla white, campanulate-rotate; appendages trapeziform, distinctly exserted, ca. 1 mm, each with a tubercle inside; limb ca. 6 mm wide; lobes obovate, ca. 2.5 mm. Anthers elliptic, ca. 1 mm. Gynobase ca. 0.5 mm. Nutlets dorsiventrally compressed, ca. 2.5 × 1.5 mm, adaxially glabrous or with few hairs, keeled above attachment scar; disc ovate-triangular, slightly convex, glabrous or sparsely pubescent, with distinct midvein, marginal rib slightly protruding, frequently with several triangular teeth on middle and below, tips not anchorlike; attachment scar slightly above middle adaxially, ovate to suborbicular. Fl. and fr. Jul-Aug.
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