| Rhododendron acraium Balf. f. & W. W. Sm. | Rhododendron primuliflorum Bureau & Franch. | | | Rhododendron acraiumBalf. f. & W. W. Sm. | Rhododendron primuliflorumBureau & Franch. |
| Rhododendron cephalanthum Franch. | | a | | Rhododendron cephalanthumFranch. | |
| Rhododendron chamaetortum Balf. f. & Kingdon-Ward | Rhododendron cephalanthum Franch. subsp. cephalanthum | | | Rhododendron chamaetortumBalf. f. & Kingdon-Ward | Rhododendron cephalanthumFranch. subsp. cephalanthum |
| Rhododendron clivicola Balf. f. & W. W. Sm. | Rhododendron primuliflorum Bureau & Franch. | | | Rhododendron clivicolaBalf. f. & W. W. Sm. | Rhododendron primuliflorumBureau & Franch. |
| Rhododendron crebreflorum Hutch. & Kingdon-Ward | Rhododendron cephalanthum Franch. subsp. cephalanthum | | | Rhododendron crebreflorumHutch. & Kingdon-Ward | Rhododendron cephalanthumFranch. subsp. cephalanthum |
| Rhododendron hypenanthum Balf. f. | Rhododendron anthopogon D. Don subsp. hypenanthum (Balf. f.) Cullen | | | Rhododendron hypenanthumBalf. f. | Rhododendron anthopogonD. Don subsp. hypenanthum (Balf. f.) Cullen |
| Rhododendron radinum Balf. f. & W. W. Sm. | Rhododendron trichostomum Franch. | | | Rhododendron radinumBalf. f. & W. W. Sm. | Rhododendron trichostomumFranch. |
| Rhododendron rufescens Franch. | | a | | Rhododendron rufescensFranch. | |
| Rhododendron sargentianum Rehder & E. H. Wilson | | a | | Rhododendron sargentianumRehder & E. H. Wilson | |
| Rhododendron anthopogon D. Don | | a | | Rhododendron anthopogonD. Don | |
| Rhododendron anthopogon D. Don subsp. anthopogon | | a | i | Rhododendron anthopogonD. Don subsp. anthopogon | |
| Rhododendron anthopogon D. Don subsp. hypenanthum (Balf. f.) Cullen | | a | i | Rhododendron anthopogonD. Don subsp. hypenanthum (Balf. f.) Cullen | |
| Rhododendron cephalanthum Franch. subsp. cephalanthum | | a | i | Rhododendron cephalanthumFranch. subsp. cephalanthum | |
| Rhododendron cephalanthum Franch. subsp. platyphyllum (Balf. f. & W. W. Sm.) Cullen | | a | i | Rhododendron cephalanthumFranch. subsp. platyphyllum (Balf. f. & W. W. Sm.) Cullen | |
| Rhododendron platyphyllum Balf. f. & W. W. Sm. | Rhododendron cephalanthum Franch. subsp. platyphyllum (Balf. f. & W. W. Sm.) Cullen | | | Rhododendron platyphyllumBalf. f. & W. W. Sm. | Rhododendron cephalanthumFranch. subsp. platyphyllum (Balf. f. & W. W. Sm.) Cullen |
| Rhododendron primuliflorum Bureau & Franch. | | a | | Rhododendron primuliflorumBureau & Franch. | |
| Rhododendron trichostomum Franch. | | a | | Rhododendron trichostomumFranch. | |