川南杜鹃 chuan nan du juan

Shrubs, ca. 3 m tall; branchlets slender, dark purple, subglabrous. Petioles ca. 3 mm, glabrous; leaf blade papery or subleathery, oblong-elliptic or subelliptic, 2.5–3.5 × 0.8–1.2 cm; base cuneate or broadly cuneate; apex tapering or acuminate; abaxial surface sparsely setose; adaxial surface glabrous, lateral veins 5–7-paired, conspicuous only below. Inflorescence 5–7-flowered. Pedicel stout, 1–1.5 cm, densely long-setose; calyx cup-shaped, deeply lobed; lobes membranous, ovate, ca. 3 mm, outer surface long-setose, margin white-fimbriate; corolla funnelform, rose, upper 3 lobes with purple flecks, ca. 1.5 × 1 cm; tube cylindric, 6–8 mm, glabrous; lobes broadly elliptic, ca. 0.6 cm, apex acuminate; stamens 5, shorter than corolla, filaments glabrous; ovary conical, ca. 3 mm, densely long-setose; style longer than stamens, long-setose below. Fl. May–Jun.

Forests; 800–1000 m. S Sichuan.