Shrub or tree, to 15 m. Leaves 6–17 × 2–5 cm, narrowly elliptic to elliptic, glabrous when mature, apex acuminate. Flowers 3–5 (rarely solitary), clustered at end of a leafy shoot below the vegetative buds, white or pink to magenta, with a yellow blotch, funnel-shaped; tube 16–22 mm; lobes 30–40 mm, broad, spreading; stamens 10. Flowering March-April. Royal Horticultural Society (1997)
Distribution Cambodia China India E Japan Laos Malaysia Thailand Vietnam Taiwan
Habitat 100–3,000 m
RHS Hardiness Rating H3
Awards AM 1937 (L. de Rothschild, Exbury & Earl of Stair, Stranraer) as R. stenaulum; flowers silvery lilac, with violet tinge, dark on lobes, spotted pale brown, tube pale crimson externally.
Conservation status Least concern (LC)
Taxonomic note (incl. R. ellipticum Maxim., R. oxyphyllum Franch., R. pectinatum Hutch., R.stenaulum Balf.f. & Forrest & R. westlandii Hemsl.) Royal Horticultural Society (1997)
A cool glasshouse subject in temperate regions. A widespread and variable species in the wild. Royal Horticultural Society (1997)