平房杜鹃 ping fang du juan

Small trees, 3–7 m; young branches gray, glabrous. Petiole 10–15 mm, glabrous; leaf blade lanceolate or elliptic-lanceolate, 8–13 × 3–5 cm; base cuneate; margin slightly revolute; apex acuminate; both surfaces glabrous; midrib grooved adaxially; lateral veins 10–15-paired, not prominent. Inflorescence umbellate, (2- or)3-flowered. Pedicel 1.3–2 cm, glabrous; calyx lobes 5, broadly triangular, minute, ca. 1 mm, glabrous; corolla broadly funnelform, tapering into well-differentiated tube, pink, 4.5–5 cm, tube 10–15 mm, glabrous; lobes 5, 2.5–3 cm; stamens 10, 2.5–3 cm, glabrous at base, pubescent above; ovary truncate at insertion of style, glabrous; style 2.5–3 cm. Capsule cylindric, 35–50 mm. Fl. Mar–Apr, fr. Sep–Oct.

Dense or open forests, thickets; 1300–1800 m. Guangxi, SE Yunnan.