卓尼杜鹃 zhuo ni du juan

Small much-branched shrubs, up to 1 m tall; branches of current year densely ferruginous to dark brown scaly. Petiole ca. 1 mm, scaly; leaf blade narrowly oblong, 1–2 × 0.4–0.7 cm; base cuneate; apex rounded, not mucronate; abaxial surface deep brown, scales contiguous, 2-colored, pale yellow, with many brown scales among them; adaxial surface dark green, scales contiguous or nearly so. Inflorescence 3- or 4-flowered. Pedicel ca. 0.1 cm, scaly; calyx salver-shaped; lobes ca. 0.8 mm, rounded, usually unequal, scales forming a central band, margin ciliate; corolla narrowly funnelform, lavender, ca. 1.6 cm, tube ca. 4 mm, throat pubescent; stamens 10, slightly shorter than corolla, filaments usually pubescent to some extent; ovary ca. 1.5 mm, densely scaly; style to 1.1 cm, slightly longer than stamens, pubescent towards at base. Capsule ovoid, 3–4 mm, densely scaly. Fl. May, fr. Jun.

Slopes, shady places; ca. 2500 m. S Gansu.