Rhododendron subgenus Rhododendron - AbsoluteAstronomy.com

Rhododendron subgenus Rhododendron is a subgenus of the genus Rhododendron
Rhododendron
Rhododendron is a genus of over 1 000 species of woody plants in the heath family, most with showy flowers...

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The subgenus includes three sections:

Rhododendron sect. Pogonathum (six species; Himalaya and adjacent mountains)
Rhododendron sect. Rhododendron (about 120 species in 25 subsections; temperate to subarctic Northern Hemisphere)
Rhododendron sect. Vireya
Rhododendron subgenus Vireya
Rhododendron subg. Vireya is a tropical subgenus of Rhododendron with 310 known species. Vireyas are native to southeastern Asia and range from Thailand to Australia....

(about 300 species; tropical southeast Asia, Australasia) – sometimes split off as a ninth subgenus.

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