| Rhododendron acraium Balf.f. & W.W.Sm. | Rhododendron primuliflorum Bureau & Franch. |
| Rhododendron achroanthum Balf.f. & W.W.Sm. | Rhododendron rupicola W.W.Sm. |
| Rhododendron ampichlorum Ingram | Rhododendron campylogynum Franch. |
| Rhododendron angustifolium Hoppe | Rhododendron hirsutum L. |
| Rhododendron anthopogon album Davidian | Rhododendron anthopogon D.Don |
| Rhododendron aromaticum Wall. | Rhododendron anthopogon D.Don |
| Rhododendron blepharocalyx Franch. | Rhododendron intricatum Franch. |
| Rhododendron caeruleoglaucum Balf.f. & Forrest | Rhododendron campylogynum Franch. |
| Rhododendron calostrotum keleticum (Balf.f. & Forrest) Cullen | Rhododendron keleticum Balf.f. & Forrest |
| Rhododendron campylogynum cremastrum (Balf.f. & Forrest) Davidian | Rhododendron campylogynum Franch. |
| Rhododendron camtschaticum glandulosum (Standl. ex Small) B.Boivin | Rhododendron glandulosum (Standl. ex Small) Millais |
| Rhododendron cantabile Balf.f. & Hutch. | Rhododendron russatum Balf.f & Forrest |
| Rhododendron caucaseum Sims | Rhododendron caucasicum Pall. |
| Rhododendron cistiflorum St.-Lag. | Rhodothamnus chamaecistus (L.) Rchb. |
| Rhododendron clivicola Balf.f. & W.W.Sm. | Rhododendron primuliflorum Bureau & Franch. |
| Rhododendron confertissimum Nakai | Rhododendron lapponicum (L.) Wahlenb. |
| Rhododendron cosmetum Balf.f. & Forrest | Rhododendron saluenense var. prostratum (W.W.Sm.) R.C.Fang |
| Rhododendron crebreflorum Balf.f. & Kingdon-Ward | Rhododendron cephalanthum Franch. |
| Rhododendron cremastrum Balf.f. & Forrest | Rhododendron campylogynum Franch. |
| Rhododendron cremnophilum Balf.f. & W.W.Sm. | Rhododendron primuliflorum Bureau & Franch. |
| Rhododendron damascenum Balf.f. & Forrest | Rhododendron campylogynum Franch. |
| Rhododendron daphniflorum Diels | Rhododendron rufescens Franch. |
| Rhododendron eudoxum trichomischum (Balf.f. & Forrest) Tagg | Rhododendron eudoxum Balf.f & Forrest |
| Rhododendron euonymifolium H.Lév. | Rhododendron emarginatum Hemsl. & E.H.Wilson |
| Rhododendron ferrugineum kotschyi (Simonkai) Hayek | Rhododendron kotschyi Simonk. |
| Rhododendron fimbriatum Hutch. | Rhododendron hippophaeoides Balf.f. & W.W.Sm. |
| Rhododendron flavum Pall. | Rhododendron aureum Georgi |
| Rhododendron fragrans (Adams) Maxim. | Rhododendron adamsii Rehder |
| Rhododendron fulvastrum trichomischum (Balf.f. & Forrest) Cowan | Rhododendron eudoxum Balf.f & Forrest |
| Rhododendron germanicum Hoppe | Rhododendron hirsutum L. |
| Rhododendron glabratum Hoppe | Rhododendron hirsutum L. |
| Rhododendron glaucoaureum Balf.f. & Forrest | Rhododendron campylogynum Franch. |
| Rhododendron gymnomiscum Balf.f. & Kingdon-Ward | Rhododendron primuliflorum Bureau & Franch. |
| Rhododendron haemonium Balf.f. & R.E.Cooper | Rhododendron anthopogon D.Don |
| Rhododendron hirsutum variegatum G.Don | Rhododendron hirsutum L. |
| Rhododendron chamaecistus L. | Rhodothamnus chamaecistus (L.) Rchb. |
| Rhododendron chamaetortum Balf.f. & Kingdon-Ward | Rhododendron cephalanthum Franch. |
| Rhododendron chamaeunum Balf.f. & Forrest | Rhododendron saluenense var. prostratum (W.W.Sm.) R.C.Fang |
| Rhododendron charapoeum Balf.f. & Forrest | Rhododendron campylogynum Franch. |
| Rhododendron charitodes Balf.f. & Farrer | Rhododendron saluenense var. prostratum (W.W.Sm.) R.C.Fang |
| Rhododendron charitorum Balf.f. & Forrest | Rhododendron saluenense var. prostratum (W.W.Sm.) R.C.Fang |
| Rhododendron chlanidotum Balf.f. & Forrest | Rhododendron citriniflorum Balf.f. & Forrest |
| Rhododendron chrysanthum Pall. | Rhododendron aureum Georgi |
| Rhododendron imperator Hutch. & Kingdon-Ward, Spec.. Rhodododendron [J.B.Stevenson] 440 (1930) | Rhododendron uniflorum Hutch. & Kingdon-Ward |
| Rhododendron indicum japonicum Maxim. | Rhododendron kiusianum Makino |
| Rhododendron jodogawa Hasskn. | Rhododendron keiskei Miq. |
| Rhododendron kingdonii Merr. | Rhododendron calostrotum Balf.f. & Kingdon-Ward |
| Rhododendron lampropeplum Balf.f. & Forrest | Rhododendron proteoides Balf.f. & W.W.Sm. |
| Rhododendron laticostum Ingram | Rhododendron keiskei Miq. |
| Rhododendron leachianum L.F.Hend. | Kalmiopsis leachiana (L.F.Hend.) Rehder |
| Rhododendron leiboense Z.J.Zhao | Rhododendron emarginatum Hemsl. & E.H.Wilson |
| Rhododendron litangense Balf.f. | Rhododendron impeditum Balf.f. & W.W.Sm. |
| Rhododendron maguanense K..M.Feng | Rhododendron emarginatum Hemsl. & E.H.Wilson |
| Rhododendron multiflorum purpureum (Maxim.) Craven | Rhododendron kroniae Craven |
| Rhododendron myrtifolium Schott & Kotschy | Rhododendron kotschyi Simonk. |
| Rhododendron myrtilloides Balf.f. & Kingdon-Ward | Rhododendron campylogynum Franch. |
| Rhododendron nanum H.Lév. | Rhododendron fastigiatum Franch. |
| Rhododendron nikomontanum (Komatsu) Nakai | Rhododendron aureum Georgi |
| Rhododendron nitens Hutch. | Rhododendron calostrotum Balf.f. & Kingdon-Ward |
| Rhododendron nwaiense Balf.f. & W.W.Sm. | Rhododendron cephalanthum Franch. |
| Rhododendron obtusum japonicum (Maxim.) Kitam. | Rhododendron kiusianum Makino |
| Rhododendron officinale Salisb. | Rhododendron aureum Georgi |
| Rhododendron osmerum Balf.f. & Forrest | Rhododendron russatum Balf.f & Forrest |
| Rhododendron pallidum (Turcz.) Dümmer | Rhododendron lapponicum (L.) Wahlenb. |
| Rhododendron paludosum Hutch. & Kingdon-Ward | Rhododendron nivale Hook.f. |
| Rhododendron palustre (L.) Kron & Judd | Rhododendron tomentosum Harmaja |
| Rhododendron parvifolium confertissimum (Nakai) A.P.Khokhr. | Rhododendron lapponicum (L.) Wahlenb. |
| Rhododendron patulum Kingdon-Ward | Rhododendron pemakoense Kingdon-Ward |
| Rhododendron peramabile Hutch. | Rhododendron intricatum Franch. |
| Rhododendron poilanei Dop | Rhododendron emarginatum Hemsl. & E.H.Wilson |
| Rhododendron polifolium (L.) Scop. | Andromeda polifolia L. |
| Rhododendron porphyrophyllum Balf.f. & Forrest | Rhododendron erastum Balf.f. & Forrest |
| Rhododendron praeclarum Balf.f. & Farrer | Rhododendron primuliflorum Bureau & Franch. |
| Rhododendron primulinum Hemsl. | Rhododendron flavidum Franch. |
| Rhododendron procumbens (L.) E.H.L.Krause | Kalmia procumbens (L.) Gift & al. ex Galasso & al. |
| Rhododendron propinquum Balf.f. & Kingdon-Ward ex Tagg | Rhododendron rupicola W.W.Sm. |
| Rhododendron prostratum W.W.Sm. | Rhododendron saluenense var. prostratum (W.W.Sm.) R.C.Fang |
| Rhododendron radicans Balf.f. & Forrest | Rhododendron keleticum Balf.f. & Forrest |
| Rhododendron repens Balf.f. & Forrest | Rhododendron forrestii Balf.f.ex Diels |
| Rhododendron repens chamaethomsonii Tagg & Forrest, Notes Roy. Bot. Gard. Edinburgh 16: 206 (1931) | Rhododendron chamaethomsonii (Tagg & Forrest) Cowan & Davidian |
| Rhododendron riparium Kingdon-Ward, Sp. Rhodod. [J.B.Stevenson] 598 (1930) | Rhododendron calostrotum Balf.f. & Kingdon-Ward |
| Rhododendron rivulare Kingdon-Ward | Rhododendron calostrotum Balf.f. & Kingdon-Ward |
| Rhododendron saisiuense Nakai | Rhododendron redowskianum Maxim. |
| Rhododendron saisuense Nakai | Rhododendron redowskianum Maxim. |
| Rhododendron saluense chamaeunum (Balf.f. & Forrest) Cullen | Rhododendron saluenense var. prostratum (W.W.Sm.) R.C.Fang |
| Rhododendron scabrifolium spiciferum (Franch.) Cullen | Rhododendron spiciferum Franch. |
| Rhododendron sericocalyx Balf.f. | Rhododendron saluenense var. prostratum (W.W.Sm.) R.C.Fang |
| Rhododendron serpens Balf.f. & Forrest | Rhododendron erastum Balf.f. & Forrest |
| Rhododendron sordidum Hutch. | Rhododendron pruniflorum Hutch. & Kingdon-Ward |
| Rhododendron spiciferum album K.M.Feng | Rhododendron spiciferum Franch. |
| Rhododendron tanakae (Maxim.) Ohwi | Rhododendron tsusiophyllum Sugim. |
| Rhododendron tapeinum Balf.f. & Farrer | Rhododendron megeratum Balf.f. & Forrest |
| Rhododendron tomentosum decumbens (Aiton) Elven & D.F.Murray | Rhododendron tomentosum Harmaja |
| Rhododendron trichocalyx Ingram | Rhododendron keiskei Miq. |
| Rhododendron trichomischum Balf.f. & Forrest | Rhododendron eudoxum Balf.f & Forrest |
| Rhododendron trichoplebeium Balf.f. & Forrest | Rhododendron eudoxum Balf.f & Forrest |
| Rhododendron tsangpoense pruniflorum (Hutch. & Kingdon-Ward) Cowan & Davidian | Rhododendron pruniflorum Hutch. & Kingdon-Ward |
| Rhododendron tsarongense Balf.f. & Forrest | Rhododendron primuliflorum Bureau & Franch. |
| Rhododendron yulingense W.P.Fang | Rhododendron nitidulum Rehder & E.H.Wilson |