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'Rhododendron flumineum' from the website Trees and Shrubs Online (treesandshrubsonline.
Shrub, 2-3 m; young shoots densely adpressed-bristly. Leaves of two kinds; spring leaves deciduous, 5.7-9 x 2.3-3 cm, elliptic, apex acute to cuspidate, both surfaces with scattered adpressed hairs; summer leaves persistent, (1.2)-2.5-3 x 0.8-1.5 cm. Flowers 3-7 per inflorescence; calyx c.1 mm, bristly; corolla pinkish white to red, with darker flecks, funnel-campanulate, c.18 mm, outer surface glabrous; stamens 5; ovary densely bristly, style bristly towards base. Royal Horticultural Society (1997)
Distribution China S Yunnan
Habitat 1,400-1,750 m
Conservation status Near threatened (NT)
This recently introduced species will almost certainly prove frost-sensitive. Royal Horticultural Society (1997)