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Shrub or small tree, 0.6-7.5m; young shoots lacking bristles. Leaves 5-10 x 2-4cm, obovate, apex abruptly acute, margin not ciliate, upper surface with midrib impressed, lower surface with the brown unequal scales touching or to a half their own diameter apart. Flowers 1-5, in a loose terminal inflorescence, not scented; calyx lobes 1-3mm, usually setose; corolla white with a yellowish basal blotch, sometimes tinged pink, funnel-shaped, 45-65mm, outer surface scaly throughout, pubescent at base; stamens 10; ovary scaly, tapering into the glabrous style.
Distribution N Burma, China (Yunnan).
RHS Hardiness H2-3.
Awards FCC 1936 (L. de Rothschild, Exbury); flowers white, with a pale yellow streak.
Taxonomic note (incl. R. scottianum Hutch. & R. supranubium Hutch.)
This species is closely allied to R. ciliicalyx (q.v.).