See text Rhododendron subg.

Choniastrum is a subgenus of the genus Rhododendron, originally a section of subgenus Azaleastrum[1] it was elevated to subgenus rank after cladistic analysis revealed that together with Rhododendron it formed a major clade, distinct from other sections of Azaleastrum.

[2] The subgenus includes twenty species, including;[3]

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