Rhododendron species, U
Plant Photo Bank of China (PPBC), U
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Flora of China
PPBC, 2011
Rhododendron unciferum PPBC, txt
Rhododendron uniflorum 
PPBC, txt
Rhododendron uniflorum var. imperator PPBC, intet
Rhododendron uniflorum var. uniflorum PPBC, txt
Rhododendron urophyllum PPBC, txt
Rhododendron uvariifolium PPBC, mange
= On the red list 
= Not on the red list -- updating