Rhododendron watsonii Hemsl. & E.H.Wilson
19500299 Wild collected in China
19568704 Cultivated material
19891448 Wild collected in China
19911279 Wild collected in China
19981588 Wild collected in China
Rhododendron websterianum Rehder & E.H.Wilson
20080251 Wild collected in China
Rhododendron wentianum Koord.
19951950 Wild collected in Papua New Guinea
Rhododendron westlandii Hemsl.
20110654 Wild collected in Laos
Rhododendron weyrichii Maxim.
19901695 Wild collected in Japan
19901697 Wild collected in Japan
19922040 Wild collected in Japan
19931976 Wild collected in South Korea
19940217 Wild collected in Japan
19940218 Wild collected in Japan
19940219 Wild collected in Japan
19942387 Wild collected in South Korea
19960094 Wild collected in South Korea
20061422 Wild collected in Japan
Rhododendron wightii Hook.f.
19170032 Cultivated material
19698924 Cultivated material
19795429 Cultivated material
19813601 Wild collected in Nepal
19870428 Wild collected in India
19891017 Wild collected in Bhutan
19892338 Wild collected in Nepal
19902705 Wild collected in Bhutan
19902755 Wild collected in Bhutan
19920217 Wild collected in Nepal
19920258 Wild collected in Nepal
19920363 Wild collected in Nepal
20160297 Cultivated from material wild collected in Bhutan
20182089 Cultivated from material wild collected in Bhutan
Rhododendron wilkiei Argent
19981810 Wild collected in Philippines
Rhododendron williamsianum Rehder & E.H.Wilson [hybrid]
19568707 Cultivated material
Rhododendron williamsianum Rehder & E.H.Wilson
19320138 Cultivated material
19699615 Cultivated material
19764027 Cultivated material
19911768 Wild collected in China
19941262 Wild collected in China
20210997 Cultivated material
Rhododendron × williamsianum 'P. den Ouden'
19568866 Cultivated material