四棱山梅花 si leng shan mei hua

Shrubs ca. 3 m tall. Branchlets of previous year dark purple, glaucous, glabrous. Petiole 0.8-1.2 cm, villous; leaf blade ovate or broadly so, 7-10 × 4-6 cm, or 4-5 × 2-3.5 cm on flowering shoots, abaxially densely gray villous, adaxially sparsely strigose, veins 3-5, basifugal, base rounded or broadly cuneate, margin sparsely serrate, apex acute or acuminate. Racemes 7-9-flowered; rachis 4-8 cm, glabrous; pedicels 0.8-1.5 cm, 4-angled. Calyx dark purple; tube 4-angled, grayish pubescent along angles; lobes ovate, 4-5 × 3-4 mm, apex acute. Corolla discoid; petals white, broadly ovate or suborbicular, 1.2-1.5 × 0.8-1.2 cm. Stamens 24-29, longest ones ca. 8 mm; anthers oblong, ca. 1.5 mm. Disc glabrous. Style divided at apex, glabrous; stigmas clavate, ca. 1.5 mm. Capsule unknown. Fl. Jun.

* Mixed forests; ca. 3200 m. Sichuan.