This List of Rhododendron species includes species of the genus Rhododendron , which is in the plant family Ericaceae . Depending on the source, there are anywhere from 800 to over 1,100 wild species.[1] [2] The vast majority of Rhododendron species are native to the eastern Himalaya and southeast Tibet, along with the islands of Java, Sumatra, Borneo, New Guinea, and the Philippines. The rest are broadly spread throughout the northern hemisphere in relatively small isolated populations, including Japan, northwestern North America, the Appalachian, and the Caucasus Mountains.[3]
Rhododendron has eight traditionally accepted subgenera based on morphology , still the consensus taxonomy used by most authorities:[4] Azaleastrum ; Candidastrum ; Hymenanthes ; Mumeazalea ; Pentanthera ; Rhododendron ; Therorhodion ; Tsutsusi .[5] Hymenanthes , with approximately 225 species, and subgenus Rhododendron , with approx. 400 species, comprise what gardeners typically describe as "Rhododendrons." Two subgenera are generally known to gardeners as "Azaleas", and include many fewer true species: Pentanthera , which comprises the deciduous azaleas, and Tsutsusi , which includes evergreen azaleas.[3]
Modern cladistic analysis, based on nuclear genetics, proposes changes in the classification of species within subgenera. These proposals are based on at least three different studies, with no changes proposed within subgenus Rhododendron and its sections. The major proposed changes are: to make section Choniastrum (originally in subgenus Azaleastrum ) a separate Choniastrum subgenus; to combine sections Ponticum , Pentanthera , and the species Rhododendron canadense in subgenus Hymenanthes ; subgenus Azaleastrum to include the former subgenera Tsutsusi , Mumeazalea , Candidastrum , and Menziesa , along with former sections Viscidula , Azaleastrum , Sciadorhodion , and the species Rhododendron vaseyi .[4]
As of 2024[update] the Plants of the World Online database lists 1091 accepted species and natural hybrids, all of which are listed here.[6]
Rhododendron arboreum Rhododendron astrophorum Rhododendron atlanticum Rhododendron austrinum
Rhododendron aberconwayi Cowan
Rhododendron abhayae L.K.Rai
Rhododendron abietifolium Sleumer
Rhododendron acrophilum Merr. & Quisumb.
Rhododendron acuminatum Hook.f.
Rhododendron adamsii Rehder
Rhododendron adenanthum M.Y.He
Rhododendron adenobracteum X.F.Gao & Y.L.Peng
Rhododendron adenogynum Diels
Rhododendron adenopodum Franch.
Rhododendron adenosum (Cowan & Davidian) Davidian
Rhododendron adinophyllum Merr.
Rhododendron aequabile J.J.Sm.
Rhododendron aeruginosum Hook.f.
Rhododendron afghanicum Aitch. & Hemsl.
Rhododendron aganniphum Balf.f. & Kingdon-Ward
Rhododendron × agastum Balf.f. & W.W.Sm.
Rhododendron agathodaemonis J.J.Sm.
Rhododendron alabamense Rehder
Rhododendron albertsenianum Forrest ex Balf.f.
Rhododendron albiflorum Hook.
Rhododendron alborugosum Argent & J.Dransf.
Rhododendron albrechtii Maxim.
Rhododendron album Blume
Rhododendron alternans Sleumer
Rhododendron alticola Sleumer
Rhododendron alutaceum Balf.f. & W.W.Sm.
Rhododendron amagianum (Makino) Makino ex H.Hara
Rhododendron amakusaense (K.Takada ex T.Yamaz.) T.Yamaz.
Rhododendron amandum Cowan
Rhododendron ambiguum Hemsl.
Rhododendron amesiae Rehder & E.H.Wilson
Rhododendron × amoenum (Lindl.) Planch.
Rhododendron amundsenianum Hand.-Mazz.
Rhododendron anagalliflorum Wernham
Rhododendron andrineae Danet
Rhododendron angiense J.J.Sm.
Rhododendron angulatum J.J.Sm.
Rhododendron annae Franch.
Rhododendron anthopogon D.Don
Rhododendron anthopogonoides Maxim.
Rhododendron anthosphaerum Diels
Rhododendron anwheiense E.H.Wilson
Rhododendron aperantum Balf.f. & Kingdon-Ward
Rhododendron apiense Argent
Rhododendron apoanum Stein
Rhododendron apradae U.Rai & Lama
Rhododendron araiophyllum Balf.f. & W.W.Sm.
Rhododendron arborescens (Pursh) Torr.
Rhododendron arboreum Sm.
Rhododendron archboldianum Sleumer
Rhododendron ardii Hutabarat, Mambrasar & Mustaqim
Rhododendron arenicola Sleumer
Rhododendron arfakianum Becc.
Rhododendron argipeplum Balf.f. & R.E.Cooper
Rhododendron argyrophyllum Franch.
Rhododendron arizelum Balf.f. & Forrest
Rhododendron armitii F.M.Bailey
Rhododendron arunachalense D.F.Chamb. & Rae
Rhododendron asperrimum Sleumer
Rhododendron asperulum Kingdon-Ward
Rhododendron asperum J.J.Sm.
Rhododendron assamicum W.Bull
Rhododendron asterochnoum Diels
Rhododendron astrophorum M.N.Tamayo, Y.P.Ang & A.S.Rob.
Rhododendron atjehense Sleumer
Rhododendron atlanticum (Ashe) Rehder
Rhododendron atrichum Argent
Rhododendron atropunicum H.P.Yang
Rhododendron atropurpureum Sleumer
Rhododendron atrovirens Franch.
Rhododendron augustinei Hemsl.
Rhododendron aureodorsale (W.P.Fang ex J.Q.Fu) Y.P.Ma & J.Nielsen
Rhododendron aureum Georgi
Rhododendron auriculatum Hemsl.
Rhododendron aurigeranum Sleumer
Rhododendron auritum Tagg
Rhododendron austrinum (Small) Rehder
Rhododendron awatosaense Minamit. & Yonek.
Rhododendron bureavii
Rhododendron bachii H.Lév.
Rhododendron baconii Argent, A.Lamb & Phillipps
Rhododendron baenitzianum Lauterb.
Rhododendron bagobonum H.F.Copel.
Rhododendron baihuaense Y.P.Ma
Rhododendron baileyi Balf.f.
Rhododendron bailiense Y.P.Ma, C.Q.Zhang & D.F.Chamb.
Rhododendron bainaense Xiang Chen & C.H.Yang
Rhododendron bainbridgeanum Tagg & Forrest
Rhododendron × bakeri (W.P.Lemmon & McKay) H.H.Hume
Rhododendron balangense W.P.Fang
Rhododendron balfourianum Diels
Rhododendron bamaense Z.J.Zhao
Rhododendron banghamiorum (J.J.Sm.) Sleumer
Rhododendron barbatum Wall. ex G.Don
Rhododendron barkamense D.F.Chamb.
Rhododendron basilicum Balf.f. & W.W.Sm.
Rhododendron × bathyphyllum Balf.f. & Forrest
Rhododendron beanianum Cowan
Rhododendron beccarii Sleumer
Rhododendron beesianum Diels
Rhododendron bellissimum D.F.Chamb.
Rhododendron benhallii Craven
Rhododendron benomense Rafidah & A.C.Elliott
Rhododendron beyerinckianum Koord.
Rhododendron bhutanense D.G.Long & Bowes Lyon
Rhododendron biappendiculatum Craven
Rhododendron bijiangense T.L.Ming
Rhododendron bivelatum Balf.f.
Rhododendron blackii Sleumer
Rhododendron bloembergenii Sleumer
Rhododendron boninense Nakai
Rhododendron bonvalotii Franch.
Rhododendron boothii Nutt.
Rhododendron borneense (J.J.Sm.) Argent, A.Lamb & Phillipps
Rhododendron brachyantherum Warb. ex P.Sarasin & Sarasin
Rhododendron brachyanthum Franch.
Rhododendron brachycarpum D.Don ex G.Don
Rhododendron brachygynum H.F.Copel.
Rhododendron brachypodarium Sleumer
Rhododendron brachypodum W.P.Fang & P.S.Liu
Rhododendron bracteatum Rehder & E.H.Wilson
Rhododendron brassii Sleumer
Rhododendron brentelii Argent
Rhododendron brevicaudatum R.C.Fang & S.S.Chang
Rhododendron brevinerve Chun & W.P.Fang
Rhododendron breviperulatum Hayata
Rhododendron brevipes Sleumer
Rhododendron brevipetiolatum M.Y.Fang
Rhododendron bryophilum Sleumer
Rhododendron bullifolium Sleumer
Rhododendron bulu Hutch.
Rhododendron × bungonishikii Komatsu
Rhododendron bureavii Franch.
Rhododendron bureavioides Balf.f.
Rhododendron × burjaticum Malyschev
Rhododendron burmanicum Hutch.
Rhododendron burttii P.Woods
Rhododendron buruense J.J.Sm.
Rhododendron buxifolium H.Low ex Hook.f.
Rhododendron buxoides Sleumer
Rhododendron calendulaceum Rhododendron canadense Rhododendron capitatum Rhododendron decorum Rhododendron degronianum
Rhododendron dachengense G.Z.Li
Rhododendron dalhousieae Hook.f.
Rhododendron danbaense L.C.Hu
Rhododendron dasycladoides Hand.-Mazz.
Rhododendron dasypetalum Balf.f. & Forrest
Rhododendron datiandingense Z.J.Feng
Rhododendron dauricum L.
Rhododendron davidii Franch.
Rhododendron davidsonianum Rehder & E.H.Wilson
Rhododendron × davisianum R.I.Milne
Rhododendron dawuense H.P.Yang
Rhododendron dayaoshanense L.M.Gao & D.Z.Li
Rhododendron dayiense M.Y.He
Rhododendron decipiens Lacaita
Rhododendron declivatum Ching & H.P.Yang
Rhododendron decorum Franch.
Rhododendron degronianum Carrière
Rhododendron dekatanum Cowan
Rhododendron delavayi Franch.
Rhododendron delicatulum Sleumer
Rhododendron dendricola Hutch.
Rhododendron dendrocharis Franch.
Rhododendron densifolium K.M.Feng
Rhododendron denudatum H.Lév.
Rhododendron detersile Franch.
Rhododendron × detonsum Balf.f. & Forrest
Rhododendron detznerianum Sleumer
Rhododendron dianthosmum Sleumer
Rhododendron dichroanthum Diels
Rhododendron dielsianum Schltr.
Rhododendron dignabile Cowan
Rhododendron dilatatum Miq.
Rhododendron dimitrum Balf.f. & Forrest
Rhododendron × diphrocalyx Balf.f.
Rhododendron discolor Franch.
Rhododendron disterigmoides Sleumer
Rhododendron × diversiflorum Danet
Rhododendron diversipilosum (Nakai) Harmaja
Rhododendron × duclouxii H.Lév.
Rhododendron dumicola Tagg & Forrest
Rhododendron durionifolium Becc.
Rhododendron dutartrei Danet
Rhododendron eastmanii Kron & Creel
Rhododendron ebianense M.Y.Fang
Rhododendron eclecteum Balf.f. & Forrest
Rhododendron edanoi Merr. & Quisumb.
Rhododendron × edgarianum Rehder & E.H.Wilson
Rhododendron edgeworthii Hook.f.
Rhododendron eheinense M.Y.He & Z.J.Zhao
Rhododendron elegantulum Tagg & Forrest
Rhododendron elliottii Watt ex Brandis
Rhododendron emarginatum Hemsl. & E.H.Wilson
Rhododendron englerianum Koord.
Rhododendron × enomotoi T.Yamaz.
Rhododendron × epilosum (J.J.Sm.) Argent
Rhododendron erastum Balf.f. & Forrest
Rhododendron ericoides H.Low ex Hook.f.
Rhododendron eriobotryoides Xiang Chen & Jia Y.Huang
Rhododendron eriocarpum (Hayata) Nakai
Rhododendron erosipetalum J.J.Sm.
Rhododendron erosum Cowan
Rhododendron × erythrocalyx Balf.f. & Forrest
Rhododendron esetulosum Balf.f. & Forrest
Rhododendron euchroum Balf.f. & Kingdon-Ward
Rhododendron eudoxum Balf.f. & Forrest
Rhododendron eurysiphon Tagg & Forrest
Rhododendron evelyneae Danet
Rhododendron exasperatum Tagg
Rhododendron excelsum A.Chev.
Rhododendron extrorsum J.J.Sm.
Rhododendron exuberans (Sleumer) Argent
Rhododendron eymae Sleumer
Rhododendron ferrugineum Rhododendron fuyuanense Rhododendron groenlandicum
Rhododendron galactinum Balf.f. ex Tagg
Rhododendron gannanense Z.C.Feng & X.G.Sun
Rhododendron gardenia Schltr.
Rhododendron gaultheriifolium J.J.Sm.
Rhododendron genestierianum Forrest
Rhododendron × geraldii (Hutch.) Ivens
Rhododendron gideonii Argent
Rhododendron × gilliardii Sleumer
Rhododendron giulianettii Lauterb.
Rhododendron glabrifilum J.J.Sm.
Rhododendron glabriflorum J.J.Sm.
Rhododendron × gladwynense M.G.Henry
Rhododendron glanduliferum Franch.
Rhododendron glandulosum (Standl. ex Small) Millais
Rhododendron glaucophyllum Rehder
Rhododendron glischroides Tagg & Forrest
Rhododendron glischrum Balf.f. & W.W.Sm.
Rhododendron gologense C.J.Xu & Z.J.Zhao
Rhododendron gonggashanense W.K.Hu
Rhododendron gongshanense T.L.Ming
Rhododendron goodenoughii Sleumer
Rhododendron goyozanense (M.Kikuchi) Craven
Rhododendron gracilentum F.Muell.
Rhododendron grande Wight
Rhododendron griersonianum Balf.f. & Forrest
Rhododendron griffithianum Wight
Rhododendron groenlandicum (Oeder) Kron & Judd
Rhododendron guangnanense R.C.Fang
Rhododendron guihainianum G.Z.Li
Rhododendron guizhongense G.Z.Li
Rhododendron guizhouense M.Y.Fang
Rhododendron gumineense Craven
Rhododendron hippophaeoides Rhododendron hyperythrum
Rhododendron habbemae Koord.
Rhododendron habrotrichum Balf.f. & W.W.Sm.
Rhododendron haematodes Franch.
Rhododendron haematophthalmum Sleumer
Rhododendron hainanense Merr.
Rhododendron hameliiflorum Wernham
Rhododendron hanceanum Hemsl.
Rhododendron hancockii Hemsl.
Rhododendron hangzhouense W.P.Fang & M.Y.He
Rhododendron haofui Chun & W.P.Fang
Rhododendron hartleyi Sleumer
Rhododendron × hasegawae S.Watan.
Rhododendron hatamense Becc.
Rhododendron heatherae Rushforth
Rhododendron heizhugouense M.Y.He & L.C.Hu
Rhododendron heliolepis Franch.
Rhododendron hellwigii Warb.
Rhododendron helodes Sleumer
Rhododendron × hemigymnum (Tagg & Forrest) D.F.Chamb.
Rhododendron hemitrichotum Balf.f. & Forrest
Rhododendron hemsleyanum E.H.Wilson
Rhododendron henanense W.P.Fang
Rhododendron henryi Hance
Rhododendron herzogii Warb.
Rhododendron heteroclitum H.P.Yang
Rhododendron heterolepis Danet
Rhododendron × hidaense Makino ex H.Hara
Rhododendron hidakanum H.Hara
Rhododendron himantodes Sleumer
Rhododendron hippophaeoides Balf.f. & W.W.Sm.
Rhododendron hirsutipetiolatum R.C.Fang & A.L.Zhang
Rhododendron hirsutum L.
Rhododendron hirtipes Tagg
Rhododendron hirtolepidotum J.J.Sm.
Rhododendron hodgsonii Hook.f.
Rhododendron hoi W.P.Fang
Rhododendron hongkongense Hutch.
Rhododendron hooglandii Sleumer
Rhododendron hookeri Nutt.
Rhododendron horlickianum Davidian
Rhododendron huadingense B.Y.Ding & Y.Y.Fang
Rhododendron huangpingense Xiang Chen & Jia Y.Huang
Rhododendron huanshanense S.S.Ying
Rhododendron huanum W.P.Fang
Rhododendron huguangense P.C.Tam
Rhododendron huidongense T.L.Ming
Rhododendron hunanense Chun ex P.C.Tam
Rhododendron hunnewellianum Rehder & E.H.Wilson
Rhododendron × hunsteinii Argent
Rhododendron hyacinthosmum Sleumer
Rhododendron hylaeum Balf.f. & Farrer
Rhododendron hyperythrum Hayata
Rhododendron hypoglaucum Hemsl.
Rhododendron hypoleucophyllum Makino
Rhododendron hypoleucum (Kom.) Harmaja
Rhododendron hyugaense (T.Yamaz.) T.Yamaz.
Rhododendron impeditum
Rhododendron igneum Cowan
Rhododendron impeditum Balf.f. & W.W.Sm.
Rhododendron impositum J.J.Sm.
Rhododendron impressopunctatum J.J.Sm.
Rhododendron inaequale (C.B.Clarke) Hutch.
Rhododendron incommodum Sleumer
Rhododendron inconspicuum J.J.Sm.
Rhododendron indicum (L.) Sweet
Rhododendron × inopinum Balf.f. ex Tagg
Rhododendron insculptum Kingdon-Ward
Rhododendron insigne Hemsl. & E.H.Wilson
Rhododendron × intermedium Tausch
Rhododendron intranervatum Sleumer
Rhododendron intricatum Franch.
Rhododendron invictum Balf.f. & Farrer
Rhododendron irroratum Franch.
Rhododendron japonicum (A.Gray) Suringar
Rhododendron japonoheptamerum Kitam.
Rhododendron jasminiflorum Hook.
Rhododendron jasminoides M.Y.He
Rhododendron javanicum (Blume) Benn.
Rhododendron jiewhoei Argent
Rhododendron jinboense Xiang Chen & X.Chen
Rhododendron jinchangense Z.H.Yang
Rhododendron jingangshanicum P.C.Tam
Rhododendron jinpingense W.P.Fang & M.Y.He
Rhododendron jinxiuense W.P.Fang & M.Y.He
Rhododendron jiulongshanense Xiang Chen & Jia Y.Huang
Rhododendron johnstoneanum (Brandis) Watt ex Hutch.
Rhododendron joniense Ching & H.P.Yang
Rhododendron kaempferi Planch.
Rhododendron × kamatae (Mochizuki) Craven
Rhododendron kanehirae E.H.Wilson
Rhododendron kansuense Millais
Rhododendron kasoense Hutch. & Kingdon-Ward
Rhododendron katsumatae (M.Tash. & H.Hatta) Craven
Rhododendron kawakamii Hayata
Rhododendron × kawir Danet
Rhododendron × keditii Sleumer
Rhododendron keiskei Miq.
Rhododendron keleticum Balf.f. & Forrest
Rhododendron kemulense J.J.Sm.
Rhododendron kendrickii Nutt.
Rhododendron kerowagiense Argent
Rhododendron kesangiae D.G.Long & Rushforth
Rhododendron keysii Nutt.
Rhododendron kiangsiense W.P.Fang
Rhododendron kingianum Watt
Rhododendron × kisoanum Okuhara ex T.Shimizu
Rhododendron kiusianum Makino
Rhododendron kiyosumense (Makino) Makino
Rhododendron klossii Ridl.
Rhododendron kochii Stein
Rhododendron kogo Danet
Rhododendron × komatsui T.Yamaz.
Rhododendron komiyamae Makino
Rhododendron kongboense Kingdon-Ward ex Hutch.
Rhododendron konori Becc.
Rhododendron korthalsii Miq.
Rhododendron kotschyi Simonk.
Rhododendron × koudzumontanum Hid.Takah. & Katsuy.
Rhododendron kroniae Craven
Rhododendron kuomeianum Yu H.Chang, J.Nielsen & Y.P.Ma
Rhododendron × kuratanum S.Watan.
Rhododendron × kurohimense Arakawa
Rhododendron kwangsiense Hu ex P.C.Tam
Rhododendron kwangtungense Merr. & Chun
Rhododendron kyawii Lace & W.W.Sm.
Rhododendron kyushuense Minamit.
Rhododendron luteum
Rhododendron labolengense Ching & H.P.Yang
Rhododendron lacteum Franch.
Rhododendron laetum J.J.Sm.
Rhododendron lagopus Nakai
Rhododendron lagunculicarpum J.J.Sm.
Rhododendron lambianum Argent
Rhododendron lamii J.J.Sm.
Rhododendron lampongum Miq.
Rhododendron lamrialianum Argent & T.J.Barkman
Rhododendron lanatoides D.F.Chamb.
Rhododendron lanatum Hook.f.
Rhododendron lanceolatum Ridl.
Rhododendron langbianense A.Chev. ex Dop
Rhododendron lanigerum Tagg
Rhododendron laojunense T.L.Ming
Rhododendron laojunshanense M.Y.Fang
Rhododendron lapponicum (L.) Wahlenb.
Rhododendron lasiostylum Hayata
Rhododendron lateriflorum R.C.Fang & A.L.Zhang
Rhododendron latoucheae Franch.
Rhododendron laudandum Cowan
Rhododendron leigongshanense C.H.Yang, Z.G.Xie, Y.F.Yu & Z.R.Yang
Rhododendron leishanicum W.P.Fang & X.S.Zhang
Rhododendron lepidostylum Balf.f. & Forrest
Rhododendron lepidotum Wall. ex G.Don
Rhododendron leptanthum F.Muell.
Rhododendron leptobrachion Sleumer
Rhododendron leptocarpum Nutt.
Rhododendron leptomorphum Sleumer
Rhododendron leptopeplum Balf.f. & Forrest
Rhododendron leptothrium Balf.f. & Forrest
Rhododendron leucaspis Tagg
Rhododendron leucogigas Sleumer
Rhododendron levinei Merr.
Rhododendron leytense Merr.
Rhododendron liangshanicum Z.J.Zhao
Rhododendron liaoxigense S.L.Tung & Z.Lu
Rhododendron liboense Zheng R.Chen & K.M.Lan
Rhododendron × liewianum Argent, A.Lamb & Phillipps
Rhododendron lilacinum Xiang Chen & X.Chen
Rhododendron liliiflorum H.Lév.
Rhododendron lindaueanum Koord.
Rhododendron lindleyi T.Moore
Rhododendron lineare Merr.
Rhododendron linearilobum R.C.Fang & A.L.Chang
Rhododendron linguiense G.Z.Li
Rhododendron litchiifolium T.C.Wu & P.C.Tam
Rhododendron loboense H.F.Copel.
Rhododendron lochiae F.Muell.
Rhododendron × lochmium Balf.f.
Rhododendron loerzingii J.J.Sm.
Rhododendron lohitense D.Bhattach.
Rhododendron lompohense J.J.Sm.
Rhododendron longesquamatum C.K.Schneid.
Rhododendron longicalyx M.Y.Fang
Rhododendron longifalcatum P.C.Tam
Rhododendron longiflorum Lindl.
Rhododendron longilobum L.M.Gao & D.Z.Li
Rhododendron longipedicellatum Lei Cai & Y.P.Ma
Rhododendron longiperulatum Hayata
Rhododendron longipes Rehder & E.H.Wilson
Rhododendron longistylum Rehder & E.H.Wilson
Rhododendron loniceriflorum P.C.Tam
Rhododendron loranthiflorum Sleumer
Rhododendron lowii Hook.f.
Rhododendron lowndesii Davidian
Rhododendron luciferum (Cowan) Cowan
Rhododendron ludlowii Cowan
Rhododendron luhuoense H.P.Yang
Rhododendron lukiangense Franch.
Rhododendron lulangense L.C.Hu & Tateishi
Rhododendron lungchiense W.P.Fang
Rhododendron luraluense Sleumer
Rhododendron luteiflorum (Davidian) Cullen
Rhododendron lutescens Franch.
Rhododendron luteum Sweet
Rhododendron maximum Rhododendron moulmainense
Rhododendron macabeanum G.Watt ex Balf.f.
Rhododendron macgregoriae F.Muell.
Rhododendron mackenzianum Forrest
Rhododendron macrophyllum D.Don ex G.Don
Rhododendron macrosiphon Sleumer
Rhododendron maculiferum Franch.
Rhododendron maddenii Hook.f.
Rhododendron madulidii Argent
Rhododendron magnificum Kingdon-Ward
Rhododendron magniflorum W.K.Hu
Rhododendron mainlingense S.H.Huang & R.C.Fang
Rhododendron majus (J.J.Sm.) Sleumer
Rhododendron makinoi Tagg ex Nakai
Rhododendron malayanum Jack
Rhododendron malipoense M.Y.He
Rhododendron mallotum Balf.f. & Kingdon-Ward
Rhododendron maoerense W.P.Fang & G.Z.Li
Rhododendron maowenense Ching & H.P.Yang
Rhododendron mariae Hance
Rhododendron mariesii Hemsl. & E.H.Wilson
Rhododendron martinianum Balf.f. & Forrest
Rhododendron maximum L.
Rhododendron maxiongense C.Q.Zhang & D.Paterson
Rhododendron maxwellii Gibbs
Rhododendron mayebarae Nakai & H.Hara
Rhododendron meagae Mambrasar & Hutabarat
Rhododendron mechukae A.A.Mao & A.Paul
Rhododendron meddianum Forrest
Rhododendron medoense W.P.Fang & M.Y.He
Rhododendron megacalyx Balf.f. & Kingdon-Ward
Rhododendron megalanthum M.Y.Fang
Rhododendron megeratum Balf.f. & Forrest
Rhododendron meijeri Argent, A.Lamb & Phillipps
Rhododendron mekongense Franch.
Rhododendron melantherum Schltr.
Rhododendron meliphagidum J.J.Sm.
Rhododendron mendumiae Argent
Rhododendron mengtszense Balf.f. & W.W.Sm.
Rhododendron menziesii Craven
Rhododendron meridionale P.C.Tam
Rhododendron mianningense Z.J.Zhao
Rhododendron micranthum Turcz.
Rhododendron microcarpum R.L.Liu & L.M.Gao
Rhododendron microgynum Balf.f. & Forrest
Rhododendron micromalayanum Sleumer
Rhododendron microphyton Franch.
Rhododendron milleri Argent
Rhododendron mimetes Tagg & Forrest
Rhododendron mindanaense Merr.
Rhododendron mingii Y.P.Ma, L.M.Gao & E.D.Liu
Rhododendron miniatum Cowan
Rhododendron minimifolium Wernham
Rhododendron minus Michx.
Rhododendron minutiflorum Hu
Rhododendron minyaense M.N.Philipson & Philipson
Rhododendron mitriforme P.C.Tam
Rhododendron miyiense W.K.Hu
Rhododendron × mizumotoi S.Watan.
Rhododendron mogeanum Argent
Rhododendron molle (Blume) G.Don
Rhododendron mollianum Koord.
Rhododendron mollicomum Balf.f. & W.W.Sm.
Rhododendron monanthum Balf.f. & W.W.Sm.
Rhododendron monkoboense Argent
Rhododendron monodii (H.J.Lam) Argent
Rhododendron montiganum T.L.Ming
Rhododendron montroseanum Davidian
Rhododendron morii Hayata
Rhododendron moulmainense Hook.
Rhododendron moupinense Franch.
Rhododendron mucronatum (Blume) G.Don
Rhododendron mucronulatum Turcz.
Rhododendron multicolor Miq.
Rhododendron multiflorum (Maxim.) Craven
Rhododendron multinervium Sleumer
Rhododendron muscicola J.J.Sm.
Rhododendron muscipulum Danet
Rhododendron myrsinifolium Ching ex W.P.Fang & M.Y.He
Rhododendron myrsinites Sleumer
Rhododendron naamkwanense Merr.
Rhododendron nakaharae Hayata
Rhododendron nakotiltum Balf.f. & Forrest
Rhododendron nanjianense K.M.Feng & Z.H.Yang
Rhododendron nanophyton Sleumer
Rhododendron nanpingense P.C.Tam
Rhododendron nantouense S.S.Ying
Rhododendron natalicium Sleumer
Rhododendron nayarii G.D.Pal
Rhododendron × nebulicola Danet
Rhododendron neobritannicum Sleumer
Rhododendron neriiflorum Franch.
Rhododendron neriifolium Schltr.
Rhododendron nervulosum Sleumer
Rhododendron ngawchangense M.N.Philipson & Philipson
Rhododendron nhatrangense Dop
Rhododendron nieuwenhuisii J.J.Sm.
Rhododendron nigroglandulosum Nitz.
Rhododendron × niko-montanum (Komatsu) Nakai
Rhododendron nipponicum Matsum.
Rhododendron nitidulum Rehder & E.H.Wilson
Rhododendron nivale Hook.f.
Rhododendron niveoflorum Argent
Rhododendron niveum Hook.f.
Rhododendron noriakianum T.Suzuki
Rhododendron nortoniae Merr.
Rhododendron nubicola Wernham
Rhododendron nudipes Nakai
Rhododendron nummatum J.J.Sm.
Rhododendron nuttallii T.J.Booth ex Nutt.
Rhododendron nyingchiense R.C.Fang & S.H.Huang
Rhododendron nymphaeoides W.K.Hu
Rhododendron occidentale
Rhododendron oblancifolium M.Y.Fang
Rhododendron occidentale (Torr. & A.Gray) A.Gray
Rhododendron ochraceum Rehder & E.H.Wilson
Rhododendron octandrum M.Y.He
Rhododendron oldhamii Maxim.
Rhododendron oliganthum Sleumer
Rhododendron oligocarpum W.P.Fang & X.S.Zhang
Rhododendron × ootrichum (Sleumer) Argent
Rhododendron opulentum Sleumer
Rhododendron orbiculare Decne.
Rhododendron orbiculatum Ridl.
Rhododendron oreadum Wernham
Rhododendron oreites Sleumer
Rhododendron oreodoxa Franch.
Rhododendron oreogenum L.C.Hu
Rhododendron oreotrephes W.W.Sm.
Rhododendron orthocladum Balf.f. & Forrest
Rhododendron osuzuyamense T.Yamaz.
Rhododendron ovatum (Lindl.) Planch. ex Maxim.
Rhododendron oxycoccoides Sleumer
Rhododendron periclymenoides Rhododendron prunifolium
Rhododendron pachycarpon Sleumer
Rhododendron pachyphyllum W.P.Fang
Rhododendron pachypodum Balf.f. & W.W.Sm.
Rhododendron pachysanthum Hayata
Rhododendron pachystigma Sleumer
Rhododendron pachytrichum Franch.
Rhododendron × pallescens Hutch.
Rhododendron papillatum Balf.f. & R.E.Cooper
Rhododendron papuanum Becc.
Rhododendron × paradoxum Balf.f. ex Tagg
Rhododendron parishii C.B.Clarke
Rhododendron parmulatum Cowan
Rhododendron parryae Hutch.
Rhododendron parvifolium Adams
Rhododendron parvulum Sleumer
Rhododendron pauciflorum King & Gamble
Rhododendron pemakoense Kingdon-Ward
Rhododendron pendulum Hook.f.
Rhododendron pennivenium Balf.f. & Forrest
Rhododendron × pennsylvanicum (B.E.Harkn.) Rehder
Rhododendron pentandrum (Maxim.) Craven
Rhododendron pentaphyllum Maxim.
Rhododendron perakense King & Gamble
Rhododendron × peregrinum Tagg
Rhododendron periclymenoides (Michx.) Shinners
Rhododendron perplexum Sleumer
Rhododendron petrocharis Diels
Rhododendron phaeochiton F.Muell.
Rhododendron phaeochristum Sleumer
Rhododendron phaeochrysum Balf.f. & W.W.Sm.
Rhododendron phaeops Sleumer
Rhododendron piercei Davidian
Rhododendron pilostylum W.K.Hu
Rhododendron pilosum (Michx. ex Lam.) Craven
Rhododendron pinetorum P.C.Tam
Rhododendron pingbianense M.Y.Fang
Rhododendron pingianum W.P.Fang
Rhododendron × planecostatum Sleumer
Rhododendron × planetum Balf.f.
Rhododendron platyphyllum (Franch. ex Diels) Balf.f. & W.W.Sm.
Rhododendron platypodum Diels
Rhododendron pleianthum Sleumer
Rhododendron pleistanthum E.H.Wilson
Rhododendron pocophorum Balf.f. ex Tagg
Rhododendron pogonophyllum Cowan & Davidian
Rhododendron poilanei Dop
Rhododendron poluninii Davidian
Rhododendron polyanthemum Sleumer
Rhododendron polycladum Franch.
Rhododendron polylepis Franch.
Rhododendron polytrichum W.P.Fang
Rhododendron pomense Cowan & Davidian
Rhododendron ponticum L.
Rhododendron populare Cowan
Rhododendron poremense J.J.Sm.
Rhododendron porphyranthes Sleumer
Rhododendron potaninii Batalin
Rhododendron praestans Balf.f. & W.W.Sm.
Rhododendron praeteritum Hutch.
Rhododendron praetervisum Sleumer
Rhododendron praevernum Hutch.
Rhododendron prainianum Koord.
Rhododendron prattii Franch.
Rhododendron preptum Balf.f. & Forrest
Rhododendron primuliflorum Bureau & Franch.
Rhododendron principis Bureau & Franch.
Rhododendron prinophyllum (Small) Millais
Rhododendron proliferum Sleumer
Rhododendron pronum Tagg & Forrest
Rhododendron protandrum Sleumer
Rhododendron proteoides Balf.f. & W.W.Sm.
Rhododendron protistum Balf.f. & Forrest
Rhododendron pruniflorum Hutch. & Kingdon-Ward
Rhododendron prunifolium (Small) Millais
Rhododendron przewalskii Maxim.
Rhododendron × psammogenes Sleumer
Rhododendron pseudobuxifolium Sleumer
Rhododendron pseudochrysanthum Hayata
Rhododendron pseudociliipes Cullen
Rhododendron pseudomaddenii A.A.Mao & Bhaumik
Rhododendron pseudotrichanthum Sleumer
Rhododendron psilanthum Sleumer
Rhododendron pubescens Balf.f. & Forrest
Rhododendron pubicostatum T.L.Ming
Rhododendron pubigermen J.J.Sm.
Rhododendron pudiense Xiang Chen & Jia Y.Huang
Rhododendron pudingense X.Y.Dai, C.H.Yang & Y.P.Ma
Rhododendron pudorinum Sleumer
Rhododendron pudorosum Cowan
Rhododendron pugeense L.C.Hu
Rhododendron pulchroides Chun & W.P.Fang
Rhododendron × pulchrum Sweet
Rhododendron pulleanum Koord.
Rhododendron pumilum Hook.f.
Rhododendron punctifolium L.C.Hu
Rhododendron purdomii Rehder & E.H.Wilson
Rhododendron purpureiflorum J.J.Sm.
Rhododendron pusillum J.J.Sm.
Rhododendron × pyrrhoanthum Balf.f.
Rhododendron pyrrhophorum Sleumer
Rhododendron qianyangense M.Y.He
Rhododendron qiaojiaense L.M.Gao & D.Z.Li
Rhododendron qinghaiense Ching ex W.Y.Wang
Rhododendron quadrasianum S.Vidal
Rhododendron quinquefolium Bisset & S.Moore
Rhododendron racemosum Franch.
Rhododendron radendum W.P.Fang
Rhododendron radians J.J.Sm.
Rhododendron ramipilosum T.L.Ming
Rhododendron ramsdenianum Cowan
Rhododendron rappardii Sleumer
Rhododendron rarilepidotum J.J.Sm.
Rhododendron rarum Schltr.
Rhododendron rawatii I.D.Rai & B.S.Adhikari
Rhododendron recurvoides Tagg & Kingdon-Ward
Rhododendron redowskianum Maxim.
Rhododendron renschianum Sleumer
Rhododendron reticulatum D.Don ex G.Don
Rhododendron retivenium Sleumer
Rhododendron retrorsipilum Sleumer
Rhododendron retusum (Blume) Benn.
Rhododendron revolutum Sleumer
Rhododendron rex H.Lév.
Rhododendron reynosoi Argent
Rhododendron rhodanthum M.Y.He
Rhododendron rhodochroum Sleumer
Rhododendron rhodoleucum Sleumer
Rhododendron rhodosalpinx Sleumer
Rhododendron rhodostomum Sleumer
Rhododendron rhombifolium R.C.Fang
Rhododendron rhuyuenense Chun ex P.C.Tam
Rhododendron rigidum Franch.
Rhododendron rimicola X.L.Tian, Y.P.Ma & J.Nielsen
Rhododendron riparioides (Cullen) Cubey
Rhododendron ripense Makino
Rhododendron ripleyi Merr.
Rhododendron ririei Hemsl. & E.H.Wilson
Rhododendron rivulare Hand.-Mazz.
Rhododendron robinsonii Ridl.
Rhododendron roseatum Hutch.
Rhododendron roseiflorum P.F.Stevens
Rhododendron rosendahlii Sleumer
Rhododendron rothschildii Davidian
Rhododendron rousei Argent & Madulid
Rhododendron roxieanum Forrest ex W.W.Sm.
Rhododendron roxieoides D.F.Chamb.
Rhododendron rubellum Sleumer
Rhododendron rubiginosum Franch.
Rhododendron rubineiflorum Craven
Rhododendron rubrantherum Kingdon-Ward
Rhododendron rubrobracteatum Sleumer
Rhododendron rubropilosum Hayata
Rhododendron rufescens Franch.
Rhododendron rufohirtum Hand.-Mazz.
Rhododendron rufum Batalin
Rhododendron rugosum H.Low ex Hook.f.
Rhododendron rupicola W.W.Sm.
Rhododendron rupivalleculatum P.C.Tam
Rhododendron rushforthii Argent & D.F.Chamb.
Rhododendron russatum Balf.f. & Forrest
Rhododendron ruttenii J.J.Sm.
Rhododendron schlippenbachii Rhododendron spinuliferum Rhododendron tomentosum
Rhododendron taggianum Hutch.
Rhododendron taibaiense Ching & H.P.Yang
Rhododendron taiense Hutch.
Rhododendron taipaoense T.C.Wu & P.C.Tam
Rhododendron taishunense B.Y.Ding & Y.Y.Fang
Rhododendron taiwanalpinum Ohwi
Rhododendron × takahashianum Sugim.
Rhododendron takeuchii Argent
Rhododendron taliense Franch.
Rhododendron tanastylum Balf.f. & Kingdon-Ward
Rhododendron tapetiforme Balf.f. & Kingdon-Ward
Rhododendron taronense Hutch.
Rhododendron tashiroi Maxim.
Rhododendron tatsienense Franch.
Rhododendron × tatuoi Nakai ex H.Hara
Rhododendron taxifolium Merr.
Rhododendron taxoides J.J.Sm.
Rhododendron telmateium Balf.f. & W.W.Sm.
Rhododendron temenium Balf.f. & Forrest
Rhododendron tenuifolium R.C.Fang & S.H.Huang
Rhododendron tenuilaminare P.C.Tam
Rhododendron tephropeploides R.A.Baines & D.F.Chamb.
Rhododendron tephropeplum Balf.f. & Farrer
Rhododendron tetramerum (Makino) Nakai
Rhododendron thaumasianthum Sleumer
Rhododendron thayerianum Rehder & E.H.Wilson
Rhododendron thomsonii Hook.f.
Rhododendron thymifolium Maxim.
Rhododendron tianlinense P.C.Tam
Rhododendron tianmenshanense C.L.Peng & L.H.Yan
Rhododendron tingwuense P.C.Tam
Rhododendron tintinnabellum Danet
Rhododendron titapuriense A.A.Mao, K.N.E.Cox & D.F.Chamb.
Rhododendron tjiasmantoi Mustaqim, Mambrasar & Hutabarat
Rhododendron tolmachevii Harmaja
Rhododendron tomentosum Harmaja
Rhododendron torajaense Craven
Rhododendron torquescens D.F.Chamb.
Rhododendron tosaense Makino
Rhododendron toxopei J.J.Sm.
Rhododendron traillianum Forrest & W.W.Sm.
Rhododendron trancongii Argent & Rushforth
Rhododendron × transiens Nakai
Rhododendron trichanthum Rehder
Rhododendron trichocladum Franch.
Rhododendron trichogynum L.C.Hu
Rhododendron × trichophorum Balf.f.
Rhododendron trichostomum Franch.
Rhododendron triflorum Hook.f.
Rhododendron trilectorum Cowan
Rhododendron trinerve Franch. ex H.Boissieu
Rhododendron triumphans Yersin & A.Chev.
Rhododendron truncatovarium L.M.Gao & D.Z.Li
Rhododendron truncicola Sleumer
Rhododendron tsaii W.P.Fang
Rhododendron tsariense Cowan
Rhododendron tschonoskii Maxim.
Rhododendron tsinlingense W.P.Fang ex J.Q.Fu
Rhododendron tsoi Merr.
Rhododendron tsurugisanense (T.Yamaz.) T.Yamaz.
Rhododendron tsusiophyllum Sugim.
Rhododendron tuba Sleumer
Rhododendron tuberculiferum J.J.Sm.
Rhododendron tubiforme (Cowan & Davidian) Davidian
Rhododendron tuhanense Argent & T.J.Barkman
Rhododendron tutcherae Hemsl. & E.H.Wilson
Rhododendron ultimum Wernham
Rhododendron unciferum P.C.Tam
Rhododendron ungeonticum A.P.Khokhr. & Mazurenko
Rhododendron ungernii Trautv. ex Regel
Rhododendron uniflorum Hutch. & Kingdon-Ward
Rhododendron urophyllum W.P.Fang
Rhododendron uvariifolium Diels
Rhododendron uwaense H.Hara & T.Yamanaka
Rhododendron vaseyi
Rhododendron vaccinioides Hook.f.
Rhododendron valentinianum Forrest ex Hutch.
Rhododendron vanderbiltianum Merr.
Rhododendron × vanhoeffenii Abrom.
Rhododendron vaniotii H.Lév.
Rhododendron vanvuurenii J.J.Sm.
Rhododendron × variolosum Becc.
Rhododendron vaseyi A.Gray
Rhododendron veitchianum Hook.
Rhododendron vellereum Hutch. ex Tagg
Rhododendron venator Tagg ex L.Rothsch.
Rhododendron vernicosum Franch.
Rhododendron verruciferum W.K.Hu
Rhododendron × verruculosum Rehder & E.H.Wilson
Rhododendron versteegii J.J.Sm.
Rhododendron verticillatum H.Low ex Lindl.
Rhododendron vesiculiferum Tagg
Rhododendron vialii Delavay & Franch.
Rhododendron vidalii Rolfe
Rhododendron villosulum J.J.Sm.
Rhododendron vinicolor Sleumer
Rhododendron vinkii Sleumer
Rhododendron virgatum Hook.f.
Rhododendron viridescens Hutch.
Rhododendron viriosum Craven
Rhododendron viscidifolium Davidian
Rhododendron viscidum C.Z.Guo & Z.H.Liu
Rhododendron viscigemmatum P.C.Tam
Rhododendron viscistylum Nakai
Rhododendron viscosum (L.) Torr.
Rhododendron vitis-idaea Sleumer
Rhododendron wadanum
Rhododendron wadanum Makino
Rhododendron walongense Kingdon-Ward
Rhododendron wardii W.W.Sm.
Rhododendron wasonii Hemsl. & E.H.Wilson
Rhododendron watsonii Hemsl. & E.H.Wilson
Rhododendron wattii Cowan
Rhododendron websterianum Rehder & E.H.Wilson
Rhododendron × welleslyanum Waterer ex Rehder
Rhododendron wentianum Koord.
Rhododendron westlandii Hemsl.
Rhododendron weyrichii Maxim.
Rhododendron whiteheadii Rendle
Rhododendron widjajae Argent & Mambrasar
Rhododendron wightii Hook.f.
Rhododendron × wilhelminae Hochr.
Rhododendron wilkiei Argent
Rhododendron williamsianum Rehder & E.H.Wilson
Rhododendron williamsii Merr. ex H.F.Copel.
Rhododendron wiltonii Hemsl. & E.H.Wilson
Rhododendron wolongense W.K.Hu
Rhododendron womersleyi Sleumer
Rhododendron wongii Hemsl. & E.H.Wilson
Rhododendron wrayi King & Gamble
Rhododendron wrightianum Koord.
Rhododendron wumingense W.P.Fang
Rhododendron wuyishanicum L.K.Ling
Rhododendron × xanthanthum (Tagg & Forrest) D.F.Chamb.
Rhododendron xanthopetalum Merr.
Rhododendron xanthostephanum Merr.
Rhododendron xenium Gill.K.Br. & Craven
Rhododendron xiangganense X.F.Jin & B.Y.Ding
Rhododendron xiaoxidongense W.K.Hu
Rhododendron xiaoxueshanense R.L.Liao & Y.P.Ma
Rhododendron xichangense Z.J.Zhao
Rhododendron xiguense Ching & H.P.Yang
Rhododendron xishuiense C.H.Yang & C.D.Yang
Rhododendron yedoense var. poukhanense
Rhododendron yakuinsulare Masam.
Rhododendron yakumontanum (T.Yamaz.) T.Yamaz.
Rhododendron yakushimanum Nakai
Rhododendron yakushimense (M.Tash. & H.Hatta) Craven
Rhododendron yangmingshanense P.C.Tam
Rhododendron yaogangxianense Q.X.Liu
Rhododendron yaoshanense L.M.Gao & S.D.Zhang
Rhododendron yaoshanicum W.P.Fang & M.Y.He
Rhododendron yedoense Maxim. ex Regel
Rhododendron yelliottii Warb.
Rhododendron yizhangense Q.X.Liu
Rhododendron yongii Argent
Rhododendron yungchangense Cullen
Rhododendron yungningense Balf.f. ex Hutch.
Rhododendron yunnanense Franch.
Rhododendron yunyianum X.F.Jin & B.Y.Ding
Rhododendron yushuense Z.J.Zhao
Rhododendron zaleucum Balf.f. & W.W.Sm.
Rhododendron zekoense Y.D.Sun & Z.J.Zhao
Rhododendron zhangjiajieense C.L.Peng & L.H.Yan
Rhododendron zheguense Ching & H.P.Yang
Rhododendron zhongdianense L.C.Hu
Rhododendron ziyuanense P.C.Tam
Rhododendron zoelleri Warb.
Rhododendron zollingeri J.J.Sm.