| Azalea atlantica Ashe | Rhododendron atlanticum (Ashe) Rehder | | | Azalea atlanticaAshe | Rhododendron atlanticum(Ashe) Rehder |
| Azalea candida Small | Rhododendron canescens (Michx.) Sweet | | | Azalea candidaSmall | Rhododendron canescens(Michx.) Sweet |
| Azalea canescens Michx. | Rhododendron canescens (Michx.) Sweet | | | Azalea canescensMichx. | Rhododendron canescens(Michx.) Sweet |
| Azalea indica L. | Rhododendron indicum (L.) Sweet | | | Azalea indicaL. | Rhododendron indicum(L.) Sweet |
| Azalea indica L. var. calycina Lindl. & Paxton | Rhododendron ×pulchrum Sweet | | i | Azalea indicaL. var.calycina Lindl. & Paxton | Rhododendron pulchrumSweet |
| Azalea japonica A. Gray | Rhododendron molle (Blume) G. Don subsp. japonicum (A. Gray) Kron | | | Azalea japonicaA. Gray | Rhododendron molle(Blume) G. Don subsp. japonicum (A. Gray) Kron |
| Azalea kiyosumensis Makino | Rhododendron kiyosumense (Makino) Makino | | | Azalea kiyosumensisMakino | Rhododendron kiyosumense(Makino) Makino |
| Azalea macrosepala (Maxim.) K. Koch | Rhododendron stenopetalum (Hogg) Mabb. | | | Azalea macrosepala(Maxim.) K. Koch | Rhododendron stenopetalum(Hogg) Mabb. |
| Azalea mollis Blume | Rhododendron molle (Blume) G. Don subsp. molle | | | Azalea mollisBlume | Rhododendron molle(Blume) G. Don subsp. molle |
| Azalea nudiflora L. f. glandifera Porter | Rhododendron periclymenoides (Michx.) Shinners | | i | Azalea nudifloraL. f. glandifera Porter | Rhododendron periclymenoides(Michx.) Shinners |
| Azalea nudiflora L. | Rhododendron periclymenoides (Michx.) Shinners | | | Azalea nudifloraL. | Rhododendron periclymenoides(Michx.) Shinners |
| Azalea obtusa Lindl. | Rhododendron obtusum (Lindl.) Planch. | | | Azalea obtusaLindl. | Rhododendron obtusum(Lindl.) Planch. |
| Azalea ovata Lindl. | Rhododendron ovatum (Lindl.) Maxim. | | | Azalea ovataLindl. | Rhododendron ovatum(Lindl.) Maxim. |
| Azalea pontica L. | Rhododendron luteum Sweet | | | Azalea ponticaL. | Rhododendron luteumSweet |
| Azalea prunifolia Small | Rhododendron prunifolium (Small) Millais | | | Azalea prunifoliaSmall | Rhododendron prunifolium(Small) Millais |
| Azalea rosea Loisel. | Rhododendron canescens (Michx.) Sweet | | | Azalea roseaLoisel. | Rhododendron canescens(Michx.) Sweet |
| Azalea sinensis Lodd. et al. | Rhododendron molle (Blume) G. Don subsp. japonicum (A. Gray) Kron | | | Azalea sinensisLodd. et al. | Rhododendron molle(Blume) G. Don subsp. japonicum (A. Gray) Kron |
| Azalea serpyllifolia A. Gray | Rhododendron serpyllifolium (A. Gray) Miq. | | | Azalea serpyllifoliaA. Gray | Rhododendron serpyllifolium(A. Gray) Miq. |
| Azalea calendulacea Michx. | Rhododendron calendulaceum (Michx.) Torr. | | | Azalea calendulaceaMichx. | Rhododendron calendulaceum(Michx.) Torr. |
| Azalea schlippenbachii (Maxim.) Kuntze | Rhododendron schlippenbachii Maxim. | | | Azalea schlippenbachii(Maxim.) Kuntze | Rhododendron schlippenbachiiMaxim. |
| Azalea vaseyi (A. Gray) Rehder | Rhododendron vaseyi A. Gray | | | Azalea vaseyi(A. Gray) Rehder | Rhododendron vaseyiA. Gray |
| Azalea poukhanensis hort. | Rhododendron yedoense Maxim. var. poukhanense (H. Lev.) Nakai | | | Azalea poukhanensishort. | Rhododendron yedoenseMaxim. var.poukhanense (H. Lev.) Nakai |
| Azalea mucronata Blume | Rhododendron mucronatum (Blume) G. Don var. mucronatum | | | Azalea mucronataBlume | Rhododendron mucronatum(Blume) G. Don var.mucronatum |
| Azalea periclymenoides Michx. | Rhododendron periclymenoides (Michx.) Shinners | | | Azalea periclymenoidesMichx. | Rhododendron periclymenoides(Michx.) Shinners |
| Azalea arborescens Pursh | Rhododendron arborescens (Pursh) Torr. | | | Azalea arborescensPursh | Rhododendron arborescens(Pursh) Torr. |
| Azalea austrina Small | Rhododendron austrinum (Small) Rehder | | | Azalea austrinaSmall | Rhododendron austrinum(Small) Rehder |
| Azalea calendulacea Michx. var. flammea Michx. | Rhododendron flammeum (Michx.) Sarg. | | i | Azalea calendulaceaMichx. var.flammea Michx. | Rhododendron flammeum(Michx.) Sarg. |
| Azalea occidentalis Torr. & A. Gray | Rhododendron occidentale (Torr. & A. Gray) A. Gray | | | Azalea occidentalisTorr. & A. Gray | Rhododendron occidentale(Torr. & A. Gray) A. Gray |
| Azalea prinophylla Small | Rhododendron prinophyllum (Small) Millais | | | Azalea prinophyllaSmall | Rhododendron prinophyllum(Small) Millais |
| Azalea viscosa L. | Rhododendron viscosum (L.) Torr. | | | Azalea viscosaL. | Rhododendron viscosum(L.) Torr. |
| Azalea nitida Pursh | Rhododendron viscosum (L.) Torr. | | | Azalea nitidaPursh | Rhododendron viscosum(L.) Torr. |
| Azalea amoena Lindl. & Paxton | Rhododendron obtusum (Lindl.) Planch. | | | Azalea amoenaLindl. & Paxton | Rhododendron obtusum(Lindl.) Planch. |
| Azalea amagiana Makino | Rhododendron amagianum (Makino) H. Hara | | | Azalea amagianaMakino | Rhododendron amagianum(Makino) H. Hara |
| Azalea lapponica L. | Rhododendron lapponicum (L.) Wahlenb. | | | Azalea lapponicaL. | Rhododendron lapponicum(L.) Wahlenb. |
| Azalea citrinum Hassk. | Rhododendron citrinum (Hassk.) Hassk. | | | Azalea citrinumHassk. | Rhododendron citrinum(Hassk.) Hassk. |
| Azalea oblongifolia Small | Rhododendron viscosum (L.) Torr. | | | Azalea oblongifoliaSmall | Rhododendron viscosum(L.) Torr. |
| Azalea pilosa Michx. | Rhododendron pilosum (Michx.) Craven | | | Azalea pilosaMichx. | Rhododendron pilosum(Michx.) Craven |
| Azalea stenopetala Hogg | Rhododendron stenopetalum (Hogg) Mabb. | | | Azalea stenopetalaHogg | Rhododendron stenopetalum(Hogg) Mabb. |