Kindly sponsored by
Peter Norris, enabling the use of The Rhododendron Handbook 1998
New article for Trees and Shrubs Online.
'Rhododendron nervulosum' from the website Trees and Shrubs Online (treesandshrubsonline.
Shrub to 1.5 m, mostly terrestrial; young twigs only very finely scaly quickly glabrescent. Leaves 5.5-8 x 0.7-1.5, narrowly elliptic to almost linear, the apex acute, the margin entire, slightly revolute in the basal half, the base narrowly tapering; the upper surface at first finely pale brown-scaly, quickly glabrescent, midrib slightly impressed in the basal half, smooth in the upper part, lateral veins 4-6 pairs, smooth; lower surface with the midrib very slightly raised throughout its length, the laterals smooth, the scales small, lobed and sparse. Flowers 1-6 per umbel, horizontal to half hanging; calyx a low minutely scaly ring; corolla opening orange and darkening to reddish with age, funnel-shaped, 2.5-4 x 2-3 cm, glabrous outside; stamens 10, slightly dimorphic, arranged regularly around the mouth of the flower; ovary densely white-hairy and with small brown scales, style glabrous. Royal Horticultural Society (1997)
Distribution Malaysia Borneo (Sabah, Kinabalu to Mt Lotung)
Habitat 2,500-3,000 m
RHS Hardiness Rating H2
Conservation status Vulnerable (VU)
This is closely allied to R. stenophyllum but may be distinguished by its broader leaves. Royal Horticultural Society (1997)