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Shrub, to at least 3 m; young shoots scaly. Leaves 15-19 x 4-5.5 cm, oblong-elliptic, apex obtuse, margin not ciliate, upper surface with raised midrib, lower surface glaucous, with the scales their own diameter apart. Flowers 3-4, in a loose inflorescence; calyx conspicuous, lobes 5-15 mm, glabrous; corolla white to cream, funnel-campanulate, 100-110 mm, outer surface scaly; stamens 10(-15); ovary densely scaly, tapering into the style which is scaly at base. Flowering May. Royal Horticultural Society (1997)
Distribution China S Yunnan, Guizhou Vietnam N
Habitat 1,800-2,500 m
RHS Hardiness Rating H3
Conservation status Vulnerable (VU)
While plants in cultivation and herbarium specimens recently collected in Vietnam generally have 10-11 stamens, the type has 15, suggesting an affinity with R. maddenii. Vegetatively there is a similarity with R. nuttallii, with which it grows in the wild, but the leaves are narrower than those of the latter species. Royal Horticultural Society (1997)