Subgenus "Tsutsusi" (C) was reduced to section status retaining the name, and included in subgenus "Azaleastrum". Of the three minor subgenera, all in C, two were discontinued. The single species of monotypic subgenus "Candidastrum" ("Rhododendron albiflorum") was moved to subgenus "Azaleastrum", section "Sciadorhodion". Similarly the single species in monotypic subgenus "Mumeazalea" ("Rhododendron semibarbatum") was placed in the new section "Tsutsusi", subgenus "Azaleastrum". Genus "Menziesa" (9 species) was also added to section "Sciadorhodion". The remaining small subgenus "Therorhodion" with its two species was left intact. Thus two subgenera, "Hymenanthes" and "Azaleastrum" were expanded at the expense of four subgenera that were eliminated, although "Azaleastrum" lost one section ("Choniastrum") as a new subgenus, since it was a distinct subclade in A. In all, "Hymenanthes" increased from one to two sections, while "Azaleastrum", by losing one section and gaining two increased from two to three sections. (See schemata under Subgenera) (Table 1.)