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Peter Norris, enabling the use of The Rhododendron Handbook 1998
New article for Trees and Shrubs Online.
'Rhododendron javanicum' from the website Trees and Shrubs Online (treesandshrubsonline.
Shrub or small tree to 5 m, terrestrial or epiphytic; young stems finely brown-scaly, becoming smooth and glabrous. Leaves 10-20 x 3-6 cm, elliptic or elliptic-lanceolate, the apex acute, the margin flat, sometimes slightly irregular, the base broadly to narrowly tapering; upper surface, finely and indistinctly scaly at first, quickly glabrescent, midrib raised in the lower half, somewhat impressed in the upper half of the leaf, lateral veins 7-10 pairs, minutely impressed; lower surface with the midrib raised throughout its length, laterals more or less smooth but distinct, scales brown, scattered and well spaced, lobed to substellate with small centres. Flowers 4-12 per umbel, erect to horizontal; calyx a low glabrous ring; corolla usually orange often with a pinkish violet throat, occasionally reported as yellow or red, funnel-shaped, 3-5 x 5-7.5 cm, glabrous or almost so outside; stamens 10, irregularly scattered mostly on the lower side of the mouth; ovary glabrous or very sparsely scaly, (hairy in var. teysmannii \[Miq.\] King & Gamble), style glabrous. Royal Horticultural Society (1997)
Distribution Indonesia Sumatra, Java, to Bali, Sulawesii as subsp. schadenbergii (Warb.) Argent. Malaysia West, as var. teysmannii Philippines as subsp. schadenbergii (Warb.) Argent.
Habitat 300-2,600 m
RHS Hardiness Rating H2
Awards AM 1933 (L. de Rothschild, Exbury); flowers deep orange, with pink throat
Conservation status Least concern (LC)
The Javan form with bright orange flowers has long been grown and admired but some Philippine forms with bright scarlet and bicoloured flowers show considerable potential. Royal Horticultural Society (1997)