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Shrub, 2-3 m; young shoots not setose. Leaves 10-11 x 3.8-4.5 cm, elliptic, apex slightly acute, sometimes with a short drip-tip, margin not ciliate; upper surface with midrib impressed, lower surface brownish, covered with large scales 1-3× their own diameter apart. Flowers 3-6, in a lax terminal inflorescence, scented; calyx disc-like, ciliate; corolla creamy white, with a greenish blotch, funnel-shaped, c.60 mm, outer surface pubescent and scaly throughout; stamens 10; ovary densely scaly, tapering into the style that is scaly in the lower half. Flowering April-May. Royal Horticultural Society (1997)
Distribution Arunachal Pradesh China SE Tibet
Habitat 1,500-2,150 m
RHS Hardiness Rating H3
Conservation status Vulnerable (VU)
This species may be distinguished from the allied R. dendricola by the calyx that is not ciliate. Royal Horticultural Society (1997)