密花齿缘草 mi hua chi yuan cao

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.

* Alpine crevices; ca. 2200 m. Xinjiang (Ürümqi Shi).