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Shrub or small tree, 2-9m; shoots soon becoming glabrous. Leaves 10-12.5 x 2-3cm, oblanceolate, apex cuspidate to acuminate, lower surface glabrous. Flowers 6-10, borne on a 3-6cm rhachis; pedicels glabrous; calyx 5-10mm, lobes rounded; corolla 7-lobed, pale red to purplish or lilac, open-campanulate, 35-50mm, glabrous; stamens 12-14; ovary and style glandular.
Distribution China (NE Yunnan & adjacent parts of Sichuan).
RHS Hardiness H4a.
This species is allied to R. davidii but differs in the larger calyx. It has only recently been introduced into cultivation from seed collected in NE Yunnan.