Rhododendron species, O
Plant Photo Bank of China (PPBC), O
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Flora of China
PPBC, 2011
Rhododendron oblancifolium 
PPBC, mange
Rhododendron obtusum PPBC, mange
Rhododendron ochraceum PPBC, fejl
Rhododendron ochraceum var. brevicarpum PPBC, mange
Rhododendron ochraceum var. ochraceum
Rhododendron octandrum PPBC, txt
Rhododendron oldhamii PPBC, mange
Rhododendron oligocarpum PPBC, mange
Rhododendron orbiculare PPBC, mange
Rhododendron orbiculare subsp. cardiobasis PPBC, fig
Rhododendron orbiculare subsp. oblongum PPBC, 2
Rhododendron orbiculare subsp. orbiculare
Rhododendron oreodoxa PPBC, mange
Rhododendron oreodoxa var. adenostylosum PPBC, 1
Rhododendron oreodoxa var. fargesii PPBC, mange + azalea
Rhododendron oreodoxa var. oreodoxa
Rhododendron oreodoxa var. shensiense PPBC, txt
Rhododendron oreogenum PPBC, txt
Rhododendron oreotrephes PPBC, mange
Rhododendron orthocladum PPBC, 3
Rhododendron orthocladum var. longistylum PPBC, txt
Rhododendron orthocladum var. orthocladum
Rhododendron ovatum PPBC, mange
= On the red list 
= Not on the red list -- updating