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 phaeochrysum' from the website Trees and Shrubs Online (treesandshrubsonline.
Shrub, 1.2-4.5 m. Leaves 4-14.5 x 1-6.5 cm, elliptic to ovate-oblong, apex acute to apiculate, lower surface covered with a one-layered compacted or felted, sometimes agglutinated, brown indumentum composed of radiate to sub-ramiform hairs; petioles floccose. Flowers 8-15, in a dense truss; calyx c.1 mm; corolla white flushed pink, with crimson flecks, funnel-campanulate, nectar pouches lacking; ovary glabrous or with a few papillate hairs, style glabrous. Flowering April-May. Royal Horticultural Society (1997)
Distribution China S Tibet, NW Yunnan, SW & C Sichuan
Habitat 3,350-4,200 m
RHS Hardiness Rating H5
Conservation status Least concern (LC)
R. agglutinatum Balf.f. & Forr.
R. dumulosum Balf.f. & Forr
Leaves 4-9 cm, indumentum agglutinated, sometimes splitting; corolla 20-35 mm. Royal Horticultural Society (1997)
Like the preceding, but the indumentum agglutinated, often splitting.The species as a whole is of wide distribution in the less rainy parts of the Sino-Himalayan region, from western Szechwan through north-west Yunnan to south Tibet. It may have been introduced by Wilson, as R. taliense, when collecting for Veitch, but most cultivated plants are from later sendings by Forrest and by Rock (although some in Sweden are from seed collected by Harry Smith in the area of Kangding (Tatsien-lu), grown as R. cuprescens).
R. glohigerum Balf.f. & Forr.
R. roxieanum var. globigerum (Balf.f. & Forr.) Chamberlain
R. dictyotum Tagg
R. iodes Balf.f. & Forr
R. levistratum Balf.f. & Forrest
Leaves 4-9 cm, indumentum felted, continuous; corolla 20-35 mm. Royal Horticultural Society (1997)
AM 1977 (R.N.S. Clarke, Borde Hill, Sussex) to a clone 'Greenmantle', Rock 11325 (USDA 59229); flowers white, with a small red blotch.
This species shows considerable variation in the leaf indumentum. It apparently merges with R. przewalskii in C Sichuan (q.v.) and hybridizes with R. aganniphum and perhaps other species in Subsect. Taliensia. Most cultivated plants named R. dryophyllum should be referred to var. levistratum; the type of R. dryophyllum is however referrable to var. phaeochrysum. Royal Horticultural Society (1997)
Syns: all those given under the heading R. dryophyllum on page 651. This variety is what was described as typical R. dryophyllum on that page. It differs from var. phaeochrysum only in its shorter leaves and smaller flowers.
R. dryophyllum Balf.f. & Forr. (type only)
R. cuprescens Nitzelius
Leaves 8-14.5 cm, indumentum felted, not splitting; corolla 32-50 mm. Royal Horticultural Society (1997)
The leading characters of this, the typical variety, are: leaves not bullate above, 3 to 51⁄2 in. long, elliptic to ovate-oblong, with a brown, densely felted, sometimes agglutinated tomentum beneath. Inflorescence rachis about 1⁄2 in. long. Calyx very small. Corolla funnel-campanulate, white flushed pink, with crimson markings in the throat, up to 2 in. long. Ovary glabrous or almost so. See further on page 652.
R. russotinctum Balf.f. & Forr.
R. triplonaevium and R. tritifolium Balf.f. & Forr