砾石杜鹃 li shi du juan

Dwarf shrubs, 0.6–1 m tall; branchlets densely gray to pale brown woolly-tomentose; bud scales persistent. Petiole ca. 5 mm, densely gray-brown to rust-red woolly-tomentose; leaf blade leathery, narrowly elliptic to oblanceolate, 3–5 × 1–1.5 cm; base cuneate; margin revolute; apex obtuse, mucronulate; abaxial surface with indumentum 2-layered, upper layer gray-brown to rust-red, thick, loose, woolly-tomentose, lower layer thin, appressed; adaxial surface dark green, glabrous except for tomentose groove of midrib. Inflorescence umbellate, 6–8-flowered; rachis 3–5 mm. Pedicel ca. 2 cm, densely rust-brown floccose-tomentose, eglandular; calyx lobes 5, 2–3 mm, broadly triangular, sparsely floccose-tomentose, margin ciliate; corolla tubular-campanulate, deep rose, with few crimson spots on corolla-tube and on upper lobes, ca. 3.5 cm, lobes 5; stamens 10, unequal, 1.2–2.2 cm, filaments white-puberulent at base; ovary ca. 5 mm, densely rufous tomentose, eglandular; style shorter than corolla and slightly longer than stamens, glabrous; stigma discoid. Fl. Jul.

Mountain thickets, rock walls, scree slopes; 3900–4300 m. SE Xizang, NW Yunnan.