Notes R.B.G. Edinb. 9:250 (1916)
Verified by:
Small shrub, 0-3-1 m, usually epiphytic. Young growth densely lepidote. Leaves ovate-elliptic or elliptic, 30-45 x 14-22 mm, cuneate at the base, acute at the apex, slightly revolute, upper surface dark geen, usually persistently lepidote with dried-out scales, lower surface finely papillose, brownish or silvery, densely covered with close, unequal, broadly rimmed, flat scales. Inflorescence l(-2)-flowered, pedicels 2-5 mm, densely lepidote. Calyx a minute, undulately lobed rim, very densely lepidote. Corolla tubular-funnel-shaped to tubular-campanulate, the lobes scarcely spreading, 14-20 mm, tube 10-14 mm, bright yellow, drying greenish, lepidote outside. Style impressed, glabrous, elepidote, exceeding the stamens. Capsule lepidote, ± cylindric, 14-16 mm.
NE Burma, China (NW Yunnan, SE Xizang)
Epiphytic on trees at forest margins, or on open slopes at the edges of thickets, 2450-3650 m
R. sulfureum sensu Diels, Notes R.B.G. Edinb. 7:66 (1912) non Franchet.
Cullen, J. (1980) A Revision of Rhododendron 1: Subgenus Rhododendron sections Rhododendron & Pogonanthum. Notes from the Royal Botanic Garden Edinburgh 39(1):60