Pyrola rugosa Andres

Herbs 14–27 cm tall. Rhizome ascending, slender, branched. Leaves 3–7; petiole 4.5–6.5 cm; leaf blade reddish abaxially, green and shiny adaxially, broadly ovate or suborbicular, 3–4.5 × 2.5–3.5 cm, thickly leathery, base rounded or truncate, margin conspicuously crenate, apex obtuse. Scape: scales 1 or 2, oblong, 8–10 × 3–4 mm; raceme 5–13-flowered, 4–9 cm. Pedicel 5–7 mm; bracts lanceolate, ca. as long as petiole or slightly longer, membranous. Flowers nodding, saucer-shaped, ca. 1 cm in diam. Sepals lanceolate or lanceolate-triangular, 3–4 × 1.5–2 mm, margin entire or obscurely crenate, apex acuminate. Petals white, ovate-lanceolate or suborbicular, 6–8 × 4–6 mm, apex acute. Filaments flattened, 7–8 mm; anthers yellow, ellipsoid, ca. 3 × 1 mm, tubules present. Style not exserted, 7–10 mm, slightly curved at upper part, dilated at apex into a ring. Capsules 5–9 mm in diam. Fl. Jun–Jul, fr. Aug–Sep.

Gansu, Shaanxi, Sichuan, Yunnan.

Montane coniferous or broad-leaved forests; 1900–4000 m.