Kindly sponsored by
Peter Norris, enabling the use of The Rhododendron Handbook 1998
New article for Trees and Shrubs Online.
'Rhododendron rigidum' from the website Trees and Shrubs Online (treesandshrubsonline.
Shrub, 1–10 m; young shoots sparsely scaly, with a bloom. Leaves 3–6.5 × 1.3–2.5 cm, elliptic to narrowly elliptic, apex acute, upper surface glabrous, lower surface with narrowly rimmed golden or brown scales 5–8× their own diameter apart; petioles glabrous. Flowers 2–6, in a loose terminal inflorescence; calyx minute, usually glabrous; corolla white to rose-pink or lilac, sometimes with red flecks, widely funnel-shaped, (21–)24–27(–30) mm, outer surface usually lacking scales, glabrous; stamens 10; ovary scaly, impressed below the declinate, glabrous style. Flowering April-May. Royal Horticultural Society (1997).
Distribution China N Yunnan, SW Sichuan, Guizhou
Habitat 2,000–3,350 m
RHS Hardiness Rating H5
Awards AM 1933 (H. White, Sunningdale Nurseries) as R. eriandrum, from Rock 11288 (USDA 59207); flowers white, slightly pink-flushed. AM 1939 (L. de Rothschild, Exbury) as R. caeruleum, from Rock 11288 (USDA 59207); flowers white, spotted red.
Conservation status Least concern (LC)
Taxonomic note (incl. R. caeruleum H.Lev. & R. eriandrum H.Lev.) Royal Horticultural Society (1997)
This species differs from the closely allied R. pleistanthum in its more distant leaf scales and glabrous petioles. Royal Horticultural Society (1997)