Kindly sponsored by
Peter Norris, enabling the use of The Rhododendron Handbook 1998
Article from Bean's Trees and Shrubs Hardy in the British Isles
'Rhododendron pubescens' from the website Trees and Shrubs Online (treesandshrubsonline.
Small shrub, to 1.3 m; young shoots scaly, and with an indumentum of filiform hairs. Leaves 1.8-2.4 x 0.3-0.6 cm, narrowly elliptic to narrowly lanceolate, margin strongly revolute, both surfaces with a persistent indumentum of filiform hairs, the upper surface also with ultimately deciduous setae that lack swollen bases. Flowers 2-3, in a loose terminal inflorescence; calyx rim-like, ciliate; corolla rose-pink, funnel-shaped, 6-11 mm, outer surface not scaly, glabrous; stamens 10; ovary scaly and pilose, impressed below the decimate style. Flowering March-April. Royal Horticultural Society (1997)
Distribution China Yunnan, Sichuan
Habitat 2,800-3,000 m
RHS Hardiness Rating H4
Awards AM 1955 (Crown Estate Commissioners, Windsor) to a clone 'Fine Bristles'; flowers white, suffused with shades of Persian Rose, buds a deep shade of pink.
Conservation status Vulnerable (VU)
This species was sunk in R. spiciferum by Mr Davidian in his revision of the former Scabrifolium series, on the grounds that it ‘is identical with R. spiciferum in every respect’ (Rhod. Cam. Year Book, No. 18 (1964), p. 128). However, Dr Cullen takes a quite different view, maintaining R. pubescens as a distinct species and placing R. spiciferum under R. scabrifolium as a variety (Rev. 1, pp. 82, 84, 85). The differences given by him are that the bristle-like hairs on the upper surface of the leaves are rather lax in R. pubescens, without swollen bases, against stiffer and with swollen bases in R. scabrifolium and its varieties, which also differ from R. pubescens in having a glabrous corolla-tube. But there is little difference in the size and shape of the foliage and the corollas.
The description of R. spiciferum on pages 775-6 serves for R. pubescens, being in fact based on a cultivated plant introduced as R. pubescens and figured under that name in the Botanical Magazine, t.9319. But the geographical distribution is narrower than stated there, R. pubescens, as understood by Dr Cullen, being confined to a small area on the borders between south-west Szechwan and Yunnan. It was found by Forrest near Mu-li and introduced by Kingdon Ward from the same area in 1921 (KW 3952A). Probably most of the cultivated plants (and the one portrayed in the Botanical Magazine) are from this collection. The clone ‘Fine Bristles’ mentioned in the last paragraph also received its award as R. pubescens.
For R. spiciferum as understood by Dr Cullen, see under R. scabrifolium in this supplement.