Noun
group of evergreen or deciduous shrubs formerly considered a separate genus; now included in the genus Rhododendron
Source: WordNetThe discontinued subgenera are Pentanthera, Tsutsusi, Candidastrum and Mumeazalea, while a new subgenus was created by elevating subgenus Azaleastrum section Choniastrum to subgenus rank. Source: Internet
The single species of monotypic subgenus Candidastrum (Rhododendron albiflorum) was moved to subgenus Azaleastrum, section Sciadorhodion. Source: Internet
The small polyphyletic subgenera Pentanthera and Azaleastrum were divided between two clades. Source: Internet