Kindly sponsored by
Peter Norris, enabling the use of The Rhododendron Handbook 1998
New article for Trees and Shrubs Online.
'Rhododendron rugosum' from the website Trees and Shrubs Online (treesandshrubsonline.
Shrub or small tree to 8 m, mostly terrestrial but also found epiphytically; young stems rather scabrid at first with brown scales that quickly fall. Leaves 6-10 x 3-5.5 cm, ovate or broadly to narrowly elliptic often strongly concave, the apex broadly pointed or shortly acuminate, the margin entire and slightly reflexed, the base broadly cuneate to rounded; upper surface with strongly impressed midrib throughout its length and about 8 pairs of strongly impressed laterals, at first brown-scaly above but very quickly glabrescent; below all veins distinct and strongly raised, with a moderately dense covering of dendroid brown scales which fall off at a touch and in old leaves may only be found in protected corners. Umbels 8-14 flowered, the flowers hanging or half hanging; calyx a low scaly and hairy ring; corolla pink to purplish pink (rarely reported as red), tubular campanulate, 2.5-3.5 x 2.5-3 cm, with fine white hairs on the tube and hairs and scales on the lobes, the scales sometimes grouped at the base of the lobes; stamens 10, irregularly arranged but predominantly on the lower side of the mouth; ovary densely white-hairy and with some silvery scales, style glabrous. Royal Horticultural Society (1997)
Distribution Malaysia Sabah and N Sarawak?
Habitat 2,000-3,500 m
RHS Hardiness Rating H2
Conservation status Least concern (LC)
Often confused with R. acuminatum q.v. It is a most attractive plant with glowing pink flowers. Royal Horticultural Society (1997)