Rhododendron longiflorum Lindl.

Shrub or tree to 3 m, epiphytic or terrestrial; young twigs initially covered in brown scales. Leaves 5–12 × 2–5.5 cm, narrowly to broadly elliptic, sometimes obovate, the apex obtuse or acute and often acuminate, the margin entire and flat, the base rounded to broadly or narrowly tapering; the upper surface at first brown-scaly, quickly glabrescent, the midrib smooth or slightly depressed, lateral veins 5–8 pairs, slender, hardly raised; the lower surface with the midrib slightly raised, the lateral veins more or less smooth, the surface moderately covered with lobed to substellate scales. Flowers 3–13 per umbel, erect or semi-erect; calyx a low scaly ring; corolla orange, pink or red, often with a yellow throat, cylindrical, straight or curved, 4–5.5 × 3–6 cm, laxly scaly outside; stamens 10, spreading around the mouth of the flower; ovary densely hairy and scaly, style hairy in the lower half, glabrous towards the top. Royal Horticultural Society (1997)

Distribution  Indonesia Sumatra, Borneo, Karimata Archipelago. Malaysia West, Borneo (widespread)

Habitat s.l.-1,000 m

RHS Hardiness Rating H1a

Conservation status Least concern (LC)