西固杜鹃 xi gu du juan

Small, erect shrubs, ca. 1 m tall; branchlets densely covered with dark brown scales. Petiole 0.8–2 mm, scaly; leaf blade oblong-elliptic or ovate-oblong, sometimes orbicular, 0.6–1.5 × 0.3–0.6 cm; base broadly cuneate or obtuse; apex rounded, not mucronulate; abaxial surface pale yellow-brown, scales contiguous, 2-colored, yellow and dark brown intermixed; adaxial surface dark green, scales nearly contiguous, pale. Inflorescence ca. 3-flowered. Pedicel ca. 0.1 cm, scaly; calyx lobes 4–6 mm, oblong or ovate, unequal, persistent in fruit, scales forming a sparse central band, margin ciliate; corolla funnelform, rose-purple, ca. 1.5 cm, tube ca. 6 mm, throat villous; stamens 10, as long as corolla, filaments pubescent towards base; ovary ca. 2 mm, densely scaly; style to 1.3 cm, longer than stamens, pubescent. Capsule ovoid, ca. 3 mm, densely scaly. Fl. and fr. Jun–Aug.

Alpine gullies; 3400–3800 m. Gansu.