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Small shrub, sometimes epiphytic, 0.3-1m; young shoots with setae persisting for at least one year. Leaves 2-3.5 x 1.2-2cm, elliptic to more or less orbicular, apex obtuse, upper surface glabrous except for a few setae at the base of the midrib, lower surface whitish-papillose, with vesicular scales sunk into pits. Pedicels short, more or less lacking scales, covered with setae. Flowers 1-3 per inflorescence; calyx lobes 6-10mm, obovate; corolla yellow or (rarely) cream, broadly campanulate, 16-23mm; stamens 10; ovary scaly, tapering into the strongly deflexed style.
Distribution India (Arunachal Pradesh), NE Burma, China (SE Tibet, NW Yunnan).
RHS Hardiness H3.
Awards AM 1935 (Lord Swaythling, Townhill Park, Southampton); flowers deep yellow. AM 1970 (Lord Aberconway and the National Trust, Bodnant); flowers yellow-green.
R. megeratum is probably allied to R. leucaspis.