Rhododendron species O
Global Biodiversity Information Facility (GBIF), O
Flora of China
GBIF 2019
Rhododendron oblongifolium Millais 17
Rhododendron obscurum Sleumer
Rhododendron obtusum Planch. 10
Rhododendron occidentale A .Gray 1005
Rhododendron
ochraceum Rehder & E.H.Wilson
Rhododendron oldhamii Maxim. 51
Rhododendron oliganthum Sleumer
Rhododendron oligocarpum W.P
.Fang & X.S.Zhang
Rhododendron opulentum Sleumer
Rhododendron orbiculare Decne.
Rhododendron orbiculatum Ridl.
Rhododendron oreadum Wernham
Rhododendron oreites Sleumer
Rhododendron oreodoxa Franch.
Rhododendron
oreotrephes W.W.Sm.
Rhododendron orion Ridl.
Rhododendron orthocladum Balf.f. &
Forrest
Rhododendron osuzuyamense T .Yamaz.
Rhododendron ovatum Maxim. 6
Rhododendron oxycoccoides Sleumer