9. Rhododendron dalhousieae J. D. Hooker, Rhododendr. Sikkim-Himalaya. 1: t. 1, 2. 1849 [“dalhousiae”].
长药杜鹃 chang yao du juan
Shrubs, often epiphytic, ca. 2 m tall; young branches scaly, otherwise glabrous or sparsely ciliate. Petiole ca. 15 mm, scaly; leaf blade thinly leathery, oblong, oblong-obovate, or oblanceolate, 9–11 × 3–4 cm; base cuneate; apex rounded; abaxial surface pale whitish green, scales glandular, reddish brown; adaxial surface glabrous; midrib raised on both surfaces. Inflorescence 2- or 3-flowered. Flowers fragrant. Pedicel ca. 1 cm, densely scaly, white pubescent; calyx lobes ca. 11 mm, oblong-elliptic, persistent in fruit, scaly at base, abaxially pubescent around the middle; corolla pale yellow, sometimes with pale red stripes, 8–10.5 cm; tube 60–75 mm, outer surface not scaly, or with a few scales only; stamens 10, filaments hairy, anthers ca. 12 mm, brown; ovary 5-locular, densely scaly; style sparsely scaly below. Capsule cylindric-spindle-shaped, ca. 45 mm, lobes keeled. Fl. Jun.
Forests, secondary mixed forest margins, hillsides, crevices on slopes, epiphytic or terrestrial; 1500–2600 m. S Xizang [Bangladesh, Bhutan, India, E Nepal, Sikkim].