粘芽杜鹃 nian ya du juan

Shrubs, ca. 3.5 m tall; young shoots densely coarsely ferruginous-strigose, with fine dark round flecks. Summer and winter leaves different. Petiole 4–6 mm, densely coarsely silky ferruginous-strigose; leaf blade papery, elliptic or oblong-elliptic, rarely ovate-elliptic, 0.8–2.5(–3.5) × 0.5–1.5 cm; base cuneate; margin conspicuously revolute; apex mucronate or acuminate; abaxial surface paler; adaxial surface appressed-strigose, with a felted indumentum intermixed with brown hairs (some hairs sticky). Inflorescence 3- or 4-flowered. Pedicel 0.3–0.4 cm, densely silky ferruginous-strigose; calyx lobes undulate crenate, small at anthesis, densely ferruginous-strigose, enlarging in fruit, then with lobes crenate to oblong, ca. 3 × 1.5 mm; corolla shortly funnel-campanulate, color unknown though with dark flecks, ca. 0.9 cm; tube shortly cylindric, ca. 4 × 3 mm, outer surface with small obtuse spines, inner surface glabrous; lobes spreading, obovate-oblong, ca. 0.5 cm, apex obtuse; stamens 5, unequal, 1.4–1.7 cm, exserted, filaments flat, puberulent below; ovary ovoid, ca. 3 × 2 mm, densely coarsely silky ferruginous-strigose; style ca. 2 cm, longer than stamens, densely coarsely strigose below. Capsule long-ovoid, 5–6 × ca. 4.5 mm, densely strigose.

Open subalpine forests; ca. 1000 m. E Guangxi.