Ericaceae

Rhododendron
     Rhododendron 'Conlee'
     Rhododendron 'Conles'
     Rhododendron 'Greeting'
     Rhododendron 'Johann Strauss'
     Rhododendron 'Nova Zembla'
     Rhododendron aberconwayi Cowan
     Rhododendron abietifolium Sleumer
     Rhododendron acraium Balf.f. & W.W.Sm.
     Rhododendron acuminatum Hook.f.
     Rhododendron adamsii Rehder
     Rhododendron adenogynum Diels
     Rhododendron adenopodum Franch.
     Rhododendron aequabile J.J.Sm.
     Rhododendron aganniphum Balf.f. & Kingdon-Ward
     Rhododendron agastum Balf.f. & W.W.Sm.
     Rhododendron alabamense Rehder
     Rhododendron albiflorum Hook.
     Rhododendron albrechtii Maxim.
     Rhododendron album Blume
     Rhododendron album var. elegans
     Rhododendron alticolum Sleumer
     Rhododendron alutaceum var. iodes (Balf.f. & Forrest) D.F.Chamb.
     Rhododendron amagianum (Makino) Makino ex H.Hara
     Rhododendron amamiense Ohwi
     Rhododendron amanoi Ohwi
     Rhododendron ambiguum Hemsl.
     Rhododendron anagalliflorum Wernham
     Rhododendron anhweiense E.H.Wilson
     Rhododendron annae Franch.
     Rhododendron annamense Rehder
     Rhododendron anthopogon Balf.f.
     Rhododendron anthopogonoides Maxim.
     Rhododendron aperantum Balf.f. & Kingdon-Ward
     Rhododendron apoanum Stein
     Rhododendron arborescens (Pursh) Torr.
     Rhododendron arborescens (Pursh) Torr. x R. cumberlandense E.L.Braun
     Rhododendron arboreum Sm.
     Rhododendron arboreum subsp. delavayi (Franch.) D.F.Chamb.
     Rhododendron arbutifolium Blackburn
     Rhododendron arbutifolium Rehder
     Rhododendron arfakianum Becc.
     Rhododendron argenteum Hook.f.
     Rhododendron argyrophyllum subsp. hypoglaucum (Hemsl.) D.F.Chamb.
     Rhododendron arizelum Balf.f. & Forrest
     Rhododendron armitii F.M.Bailey
     Rhododendron ashleyi Coker
     Rhododendron asperum J.J.Sm.
     Rhododendron atlanticum (Ashe) Rehder
     Rhododendron atlanticum f. tomolobum Fernald
     Rhododendron atropurpureum Sleumer
     Rhododendron aucklandii Hook.f.
     Rhododendron augustinii Hemsl.
     Rhododendron augustinii subsp. chasmanthum (Diels) Cullen
     Rhododendron augustinii subsp. hardyi (Davidian) Cullen
     Rhododendron aureum Georgi
     Rhododendron auriculatum Hemsl.
     Rhododendron aurigenarum Sleumer
     Rhododendron aurigeranum Sleumer
     Rhododendron austrinum (Small) Rehder
     Rhododendron austrinum (Small) Rehder x R. canescens (Michx.) Sweet
     Rhododendron azaleoides Desf.
     Rhododendron bachii H.Lév.
     Rhododendron bagobonum H.F.Copel.
     Rhododendron bainbridgeanum Tagg & Forrest
     Rhododendron balfourianum Diels
     Rhododendron balfourianum var. aganniphoides Tagg & Forrest
     Rhododendron barbatum Wall. ex Don
     Rhododendron basilicum Balf.f. & W.W.Sm.
     Rhododendron baxifolium Hook.f.
     Rhododendron beesianum Diels
     Rhododendron beyerinckianum Koord.
     Rhododendron borneense (J.J.Sm.) Argent, A.L.Lamb & Phillipps
     Rhododendron borneense subsp. villosum (J.J.Sm.) Argent, A.L.Lamb & Phillipps
     Rhododendron brachyandrum Balf.f. & Forrest
     Rhododendron brachyanthum subsp. hypolepidotum (Franch.) Cullen
     Rhododendron brachycarpum D.Don ex Don
     Rhododendron breviperulatum Hayata
     Rhododendron brookeanum H.Low ex Lindl.
     Rhododendron brookeanum subsp. gracile (Lindl.) Argent
     Rhododendron brunneifolium Balf.f. & Forrest
     Rhododendron bryophilum Sleumer
     Rhododendron bureavii Franch.
     Rhododendron burjaticum Malyschev
     Rhododendron burmanicum Hutch.
     Rhododendron burtii P.Woods
     Rhododendron butrycium Kingdon-Ward
     Rhododendron buxifolium H.Low ex Hook.f.
     Rhododendron buxoides Sleumer
     Rhododendron calendulaceum (Michx.) Torr.
     Rhododendron calendulaceum (Michx.) Torr. x R. periclymenoides (Michx.) Shinners
     Rhododendron californicum
     Rhododendron californicum Hook.
     Rhododendron callimorphum Balf.f. & W.W.Sm.
     Rhododendron calostrotum subsp. keleticum (Balf.f. & Forrest) Cullen
     Rhododendron calostrotum subsp. riparium (Kingdon-Ward) Cullen
     Rhododendron calostrotum var. riparioides (Cullen) R.C.Fang
     Rhododendron caloxanthum Balf.f. & Farrer
     Rhododendron calvescens Balf.f. & Forrest
     Rhododendron camelliiflorum Hook.f.
     Rhododendron campanulatum D.Don
     Rhododendron campylocarpum Hook.f.
     Rhododendron campylocarpum Hook.f. subsp. campylocarpum
     Rhododendron campylogynum Franch.
     Rhododendron camtschaticum Pall.
     Rhododendron canadense (L.) Torr.
     Rhododendron canadense f. viridifolium Fernald
     Rhododendron canescens (Michx.) Sweet
     Rhododendron canescens (Michx.) Sweet x R. alabamense Rehder
     Rhododendron canescens (Michx.) Sweet x R. flammeum (Michx.) Sarg.
     Rhododendron canescens (Michx.) Sweet x R. periclymenoides (Michx.) Shinners
     Rhododendron canescens var. canescens
     Rhododendron capitatum Maxim.
     Rhododendron carolinianum Rehder
     Rhododendron carolinianum Rehder x R. mucronulatum Turcz.
     Rhododendron carrii Sleumer
     Rhododendron catacosmum Balf.f. ex Tagg
     Rhododendron catawbiense Michx.
     Rhododendron caucasicum Pall.
     Rhododendron cavaleriei H.Lév.
     Rhododendron cephalanthum Franch.
     Rhododendron cephalanthum subsp. platyphyllum (Franch. ex Balf.f. & Sm.) Cullen
     Rhododendron ceraceum Balf.f. & W.W.Sm.
     Rhododendron chaetomallum Balf.f. & Forrest
     Rhododendron chalarocladum Balf.f. & Forrest
     Rhododendron chamaecistus L.
     Rhododendron chamaetortum Balf.f. & Kingdon-Ward
     Rhododendron championae Hook.
     Rhododendron championiae Hook.
     Rhododendron chapmanii (Alph.Wood) A.Gray
     Rhododendron chapmanii A.Gray
     Rhododendron chlanidotum Balf.f. & Forrest
     Rhododendron christianae Sleumer
     Rhododendron chrysanthum Pall.
     Rhododendron chryseum Balf.f. & Kingdon-Ward
     Rhododendron chrysocalyx H.Lév. & Vaniot
     Rhododendron chrysodoron Tagg ex Hutch.
     Rhododendron ciliatum Hook.
     Rhododendron cinnabarinum Hook.f.
     Rhododendron citriniflorum Balf.f. & Forrest
     Rhododendron clementinae Forrest
     Rhododendron cloiophorum Balf.f. & Forrest
     Rhododendron coccinopeplum Balf.f. & Forrest
     Rhododendron coelicum Balf.f. & Farrer
     Rhododendron colletum Balf.f. & Forrest
     Rhododendron columbianum (Piper) Harmaja
     Rhododendron commonae F.Först.
     Rhododendron commutatum Sleumer
     Rhododendron complexum Balf.f. & W.W.Sm.
     Rhododendron concinnum Hemsl.
     Rhododendron copelandii Merr.
     Rhododendron coriaceum Franch.
     Rhododendron coryi Shinners
     Rhododendron coryphaeum Balf.f. & Forrest
     Rhododendron crassifolium Stapf
     Rhododendron craytoni [ined.]
     Rhododendron crinigerum Franch.
     Rhododendron crinigerum var. euadenium Hutch.
     Rhododendron croceum Balf.f. & W.W.Sm.
     Rhododendron cruttwellii Sleumer
     Rhododendron cucullatum Hand.-Mazz.
     Rhododendron culminicolum F.Muell.
     Rhododendron cumberlandense E.L.Braun
     Rhododendron cuneatum W.W.Sm.
     Rhododendron cuneifolium Stapf
     Rhododendron cuneifolium var. subspathulatum Merr.
     Rhododendron cuthbertii Small
     Rhododendron cyanocarpum (Franch.) W.Sm.
     Rhododendron dahuricum L. ex Dippel
     Rhododendron dalhousieae Hook.f.
     Rhododendron dasycladoides Hand.-Mazz.
     Rhododendron dasycladum Balf.f. & W.W.Sm.
     Rhododendron dauricum L.
     Rhododendron dauricum var. mucronulatum (Turcz.) Vorosch.
     Rhododendron davidii Franch.
     Rhododendron davidsonianum Rehder & E.H.Wilson
     Rhododendron decandrum (Makino) Makino
     Rhododendron decorum Franch.
     Rhododendron degronianum Carrière
     Rhododendron delavayi Franch.
     Rhododendron dendricola Hutch.
     Rhododendron dendritrichum Balf.f. & Forrest
     Rhododendron detonsum Balf.f. & Forrest
     Rhododendron dictyotum Balf.f. ex Tagg
     Rhododendron didymum Balf.f. & Forrest
     Rhododendron dielsianum Schltr.
     Rhododendron dilatatum Miq.
     Rhododendron discolor Franch.
     Rhododendron doctersii J.J.Sm.
     Rhododendron dolerum Balf.f. & Forrest
     Rhododendron dryophyllum Balf.f. & Forrest
     Rhododendron durionifolium Becc.
     Rhododendron durionifolium subsp. sabahense Argent, A.L.Lamb & Phillipps
     Rhododendron eclecteum Balf.f. & Forrest
     Rhododendron edanoi subsp. pneumonanthum (Sleumer) Argent
     Rhododendron edgeworthii Hook.f.
     Rhododendron elaeagnoides Hook.
     Rhododendron elliottii Watt ex Brandis
     Rhododendron ellipticum Hoffmanns.
     Rhododendron emarginatum Hemsl.
     Rhododendron ericoides Hook.f.
     Rhododendron eriocarpum Nakai
     Rhododendron eritimum Balf.f. & W.W.Sm.
     Rhododendron erubescens Hutch.
     Rhododendron euchaites Balf.f. & Forrest
     Rhododendron eudoxum Balf.f. & Forrest
     Rhododendron euonymifolium H.Lév.
     Rhododendron evelyneae Danet
     Rhododendron faberi Hemsl.
     Rhododendron facetum Balf.f. & Kingdon-Ward
     Rhododendron falconeri Hook.f.
     Rhododendron fallacinum Sleumer
     Rhododendron fargesii Franch.
     Rhododendron farrerae Sweet
     Rhododendron fastigiatum Franch.
     Rhododendron fauriei Franch.
     Rhododendron ferrugineum L.
     Rhododendron fictolacteum Balf.f.
     Rhododendron flammeum (Michx.) Sarg.
     Rhododendron flavorufum Balf.f. & Forrest
     Rhododendron flavum (Hoffmanns.) G.Don
     Rhododendron fletcherianum Davidian
     Rhododendron floccigerum Franch.
     Rhododendron fokienense Franch.
     Rhododendron formosanum Hemsl.
     Rhododendron formosum Wall. var. formosum
     Rhododendron forrestii Balf.f. ex Diels
     Rhododendron fortunei Lindl.
     Rhododendron fragrantissimum Burb.
     Rhododendron frey-wysslingii J.J.Sm.
     Rhododendron fulvastrum Balf.f. & Forrest
     Rhododendron fulvoides Balf.f. & Forrest
     Rhododendron fulvum Balf.f. & W.W.Sm.
     Rhododendron gandavense K.Koch bis
     Rhododendron gemmiferum M.N.Philipson & Philipson
     Rhododendron genestierianum Forrest
     Rhododendron glaphyrum Balf.f. & Forrest
     Rhododendron glaucum Hook.
     Rhododendron glischrum Balf.f. & W.W.Sm.
     Rhododendron globigerum Balf.f. & Forrest
     Rhododendron gracilentum F.Muell.
     Rhododendron gracilipes Franch.
     Rhododendron grande Wight
     Rhododendron griersonianum Balf.f. & Forrest
     Rhododendron griffithianum Wight
     Rhododendron groenlandicum (Oeder) Kron & Judd
     Rhododendron habrotrichum Balf.f. & W.W.Sm.
     Rhododendron haemaleum Balf.f. & Forrest
     Rhododendron haematodes Franch.
     Rhododendron haematodes Franch. x R. fortunei Lindl.
     Rhododendron haematophthalmum Sleumer
     Rhododendron hainanense Merr.
     Rhododendron hanceanum Hemsl.
     Rhododendron hancockii Hemsl.
     Rhododendron heliolepis Franch.
     Rhododendron heliolepis var. brevistylum (Franch.) Cullen
     Rhododendron helvolum Balf.f. & Forrest
     Rhododendron hemidartum Balf.f. ex Tagg
     Rhododendron hemitrichotum Balf.f. & Forrest
     Rhododendron henryi Hance
     Rhododendron heptamerum Balf.f.
     Rhododendron herpesticum Balf.f. & Kingdon-Ward
     Rhododendron herzogii Warb.
     Rhododendron himantodes Sleumer
     Rhododendron himertum Balf.f. & Forrest
     Rhododendron hinodegiri
     Rhododendron hippophaeoides Balf.f. & W.W.Sm.
     Rhododendron hippophaeoides var. occidentale M.N.Philipson & Philipson
     Rhododendron hirsutum L.
     Rhododendron hodgsonii Hook.f.
     Rhododendron horaeum Balf.f. & Forrest
     Rhododendron houlstonii Hemsl. & E.H.Wilson
     Rhododendron hunanense Chun ex P.C.Tam
     Rhododendron hylaeum Balf.f. & Farrer
     Rhododendron hypenanthum Balf.f.
     Rhododendron hypoglaucum Hemsl.
     Rhododendron impeditum Balf.f. & W.W.Sm.
     Rhododendron impeditum Balf.f. & W.W.Sm. x R. nivale subsp. boreale Philipson & M.N.Philipson
     Rhododendron incommodum Sleumer
     Rhododendron inconspicuum J.J.Sm.
     Rhododendron indicum (L.) Sweet
     Rhododendron indicum var. amoenum Sweet
     Rhododendron indicum var. macranthum
     Rhododendron indicum var. macranthum Maxim.
     Rhododendron indicum var. obtusum Maxim.
     Rhododendron intortum Balf.f. & Forrest
     Rhododendron intranervatum Sleumer
     Rhododendron intricatum Franch.
     Rhododendron iodes Balf.f. & Forrest
     Rhododendron irroratum Franch.
     Rhododendron iteaphyllum Hutch.
     Rhododendron ixeuticum Balf.f. & W.W.Sm.
     Rhododendron japonicum (A.Gray) Suringar
     Rhododendron japonicum Sur
     Rhododendron jasminiflorum Hook.
     Rhododendron jasminiflorum subsp. copelandii (Merr.) Argent
     Rhododendron jasminiflorum var. carminatum
     Rhododendron javanicum 'Minerva'
     Rhododendron javanicum (Blume) Benn.
     Rhododendron javanicum Benn.
     Rhododendron javanicum subsp. schadenbergii (Warb.) Argent
     Rhododendron javanicum subsp. teysmannii (Miq.) Argent
     Rhododendron jenestierianum Forrest
     Rhododendron kaempferi Planch.
     Rhododendron kamscaticum [ined.]
     Rhododendron kamtchaticum Pall.
     Rhododendron kamtschaticum subsp. glandulosum (Standl. ex Small) Hultén
     Rhododendron kasoense Hutch. & Kingdon-Ward
     Rhododendron kawakamii Hayata
     Rhododendron keiskei Miq.
     Rhododendron keysseri F.Först.
     Rhododendron kiusianum Makino
     Rhododendron kiyosumense (Makino) Makino
     Rhododendron kochii Stein
     Rhododendron konori Becc.
     Rhododendron konori Becc. x R. herzogii Warb.
     Rhododendron kosterianum
     Rhododendron kosterianum var. 'Miss Louisa Hunnewell'
     Rhododendron kwangsiense C.M.Hu ex W.P.Fang
     Rhododendron kwangtungense Merr. & Chun
     Rhododendron kyawii Lace & W.W.Sm.
     Rhododendron L.
     Rhododendron lacteum Franch.
     Rhododendron laetivirens Rehder
     Rhododendron laetum J.J.Sm.
     Rhododendron lagopus Nakai
     Rhododendron lampropeplum Balf.f. & Forrest
     Rhododendron lanatum Hook.f.
     Rhododendron lanceolatum Ridl.
     Rhododendron lapponicum (L.) Wahlenb.
     Rhododendron lasiostylum Hayata
     Rhododendron lateritium Planch.
     Rhododendron latoucheae Franch.
     Rhododendron ledifolium G.Don
     Rhododendron leiopodum Hayata
     Rhododendron lepidotum Wall. ex Don
     Rhododendron leptanthum F.Muell.
     Rhododendron leptothrium Balf.f. & Forrest
     Rhododendron leucaspis Tagg
     Rhododendron leucogigas Sleumer
     Rhododendron leucopetalum Balf.f. & Forrest
     Rhododendron levinei Merr.
     Rhododendron levistratum Balf.f. & Forrest
     Rhododendron leytense Merr.
     Rhododendron liliiflorum H.Lév.
     Rhododendron lindaueanum Koord.
     Rhododendron lindleyi T.Moore
     Rhododendron linearifolium Poir.
     Rhododendron litiense Balf.f. & Forrest
     Rhododendron lochae F.Muell.
     Rhododendron lochiae F.Muell.
     Rhododendron longiflorum Lindl.
     Rhododendron longiflorum var. heusseri J.J.Sm.
     Rhododendron loranthiflorum Sleumer
     Rhododendron loranthifolium Sleumer
     Rhododendron lowii Hook.f.
     Rhododendron lukiangense Franch.
     Rhododendron luteum Sweet
     Rhododendron lyi H.Lév.
     Rhododendron macabeanum Watt ex Balf.f.
     Rhododendron macgregoriae F.Muell.
     Rhododendron mackenzianum Forrest
     Rhododendron macranthum (Bunge) G.Don
     Rhododendron macrophyllum D.Don
     Rhododendron macrophyllum D.Don ex G.Don
     Rhododendron macrosepalum Maxim.
     Rhododendron macrostemon Maxim.
     Rhododendron maculiferum Franch.
     Rhododendron maculiferum var. maculiferum
     Rhododendron maddenii Hook.
     Rhododendron maddenii subsp. crassum (Franch.) Cullen
     Rhododendron magnificum Kingdon-Ward
     Rhododendron maius (J.J.Sm.) Sleumer
     Rhododendron makinoi Tagg
     Rhododendron malayanum Jack
     Rhododendron mandarinorum Diels
     Rhododendron mariae Hance
     Rhododendron mariesii Hemsl. & E.H.Wilson
     Rhododendron martinianum Balf.f. & Forrest
     Rhododendron maximum L.
     Rhododendron maxwellii Gibbs
     Rhododendron megacalyx Balf.f. & Kingdon-Ward
     Rhododendron megeratum Balf.f. & Forrest
     Rhododendron mekongense Franch.
     Rhododendron mekongense var. melinanthum (Balf.f. & Kingdon-Ward) Cullen
     Rhododendron meliphagidum J.J.Sm.
     Rhododendron mengtszense Balf.f. & W.W.Sm.
     Rhododendron menziesii Craven
     Rhododendron metrium Balf.f. & Forrest
     Rhododendron metternichii Siebold & Zucc.
     Rhododendron micranthum Turcz.
     Rhododendron microflorum C.M.Hu
     Rhododendron microgynum Balf.f. & Forrest
     Rhododendron micromalayanum Sleumer
     Rhododendron micromeres Tagg
     Rhododendron microphyton Franch.
     Rhododendron mindanaense Merr.
     Rhododendron minus Michx.
     Rhododendron minus var. minus
     Rhododendron minyaense Philipson & M.N.Philipson
     Rhododendron molle (Blume) G.Don
     Rhododendron monanthum Balf.f. & W.W.Sm.
     Rhododendron morelianum Lem.
     Rhododendron morii Hayata
     Rhododendron moulmainense Hook.
     Rhododendron mucronatum Don
     Rhododendron mucronatum var. ripense G.Don
     Rhododendron mucronulatum Turcz.
     Rhododendron multicolor Miq.
     Rhododendron multinervium Sleumer
     Rhododendron myrtifolium Lodd.
     Rhododendron myrtilloides Balf.f. & Kingdon-Ward
     Rhododendron naamkwanense Merr.
     Rhododendron neobritannicum Sleumer
     Rhododendron neriiflorum Franch.
     Rhododendron neriifolium Schltr.
     Rhododendron nervulosum Sleumer
     Rhododendron nieuwenhuisii J.J.Sm.
     Rhododendron nilagiricum Zenker
     Rhododendron niphargum Balf.f. & Kingdon-Ward
     Rhododendron nipponicum Matsum.
     Rhododendron nitidulum var. omeiense M.N.Philipson & Philipson
     Rhododendron nivale Hook.
     Rhododendron nivale subsp. australe M.N.Philipson & Philipson
     Rhododendron nivale subsp. boreale Philipson & M.N.Philipson
     Rhododendron nivale subsp. boreale Philipson & M.N.Philipson x R. rupicola var. muliense (Balf.f. & Forrest) Philipson & M.N.Philipson
     Rhododendron niveum Hook.f.
     Rhododendron nudiflorum Torr.
     Rhododendron nudiflorum var. glandiferum (Porter) Rehder
     Rhododendron nudiflorum var. glanduliferum (Porter) Rehder
     Rhododendron nudiflorum var. roseum Wiegand
     Rhododendron nudipes Nakai
     Rhododendron nummatum J.J.Sm.
     Rhododendron nuttallii Booth ex Nutt.
     Rhododendron oblongifolium (Small) Millais
     Rhododendron obovatum Hook.
     Rhododendron obtusum (Lindl.) Planch.
     Rhododendron obtusum var. amoenum Planch. & Rehder
     Rhododendron obtusum var. hinodigiri
     Rhododendron obtusum var. japonicum (Maxim.) Planch.
     Rhododendron obtusum var. kaempferi
     Rhododendron obtusum var. tosaense (Makino) Kitam.
     Rhododendron occidentale
     Rhododendron occidentale (Torr. & A.Gray) A.Gray
     Rhododendron occidentale var. californicum (Torr. & A.Gray ex Durand) Hrusa
     Rhododendron occidentale var. occidentale
     Rhododendron occidentale var. paludosum Jeps.
     Rhododendron oldhamii Maxim.
     Rhododendron orbiculatum Ridl.
     Rhododendron oreotrephes W.W.Sm.
     Rhododendron orthocladum Balf.f. & Forrest
     Rhododendron orthocladum var. longistylum M.N.Philipson & Philipson
     Rhododendron ovatum Maxim.
     Rhododendron pachypodum Balf.f. & W.W.Sm.
     Rhododendron pagophilum Balf.f. & Kingdon-Ward
     Rhododendron parvifolium Adams
     Rhododendron pauciflorum King & Gamble
     Rhododendron pendulum Hook.
     Rhododendron pentaphyllum Maxim.
     Rhododendron periclymenoides (Michx.) Shinners
     Rhododendron petelotii Dop
     Rhododendron phaeochitum F.Muell.
     Rhododendron phaeochrysum Balf.f. & W.W.Sm.
     Rhododendron phaeochrysum var. agglutinatum (Balf.f. & Forrest) D.F.Chamb.
     Rhododendron phaeopeplum Sleumer
     Rhododendron pilicalyx Hutch.
     Rhododendron pingianum W.P.Fang
     Rhododendron pittosporaefolium Hemsl.
     Rhododendron planetum Balf.f.
     Rhododendron platypodum Diels
     Rhododendron pleianthum Sleumer
     Rhododendron pleistanthum Balf.f. ex Hutch.
     Rhododendron pocophorum Balf.f. ex Tagg
     Rhododendron poecilodermum Balf.f. & Forrest
     Rhododendron poilanei Dop
     Rhododendron polycladum Franch.
     Rhododendron polylepis Franch.
     Rhododendron ponticum L.
     Rhododendron ponticum subsp. baeticum (Boiss. & Reut.) Hand.-Mazz.
     Rhododendron poukhanense H.Lév.
     Rhododendron praecox
     Rhododendron praetervisum Sleumer
     Rhododendron praevernum Hutch.
     Rhododendron prattii Franch.
     Rhododendron preptum Balf.f. & Forrest
     Rhododendron primuliflorum Bureau & Franch.
     Rhododendron prinophyllum (Small) Millais
     Rhododendron prinophyllum (Small) Millais x R. calendulaceum (Michx.) Torr.
     Rhododendron prinophyllum (Small) Millais x R. occidentale (Torr. & A.Gray) A.Gray
     Rhododendron prinophyllum (Small) Millais x R. periclymenoides (Michx.) Shinners
     Rhododendron probum Balf.f. & Forrest
     Rhododendron pronum Tagg & Forrest
     Rhododendron proteoides Balf.f. & W.W.Sm.
     Rhododendron protistum Balf.f. & Forrest
     Rhododendron prunifolium (Small) Millais
     Rhododendron przewalskii Maxim.
     Rhododendron pseudochrysanthum Hayata
     Rhododendron pubescens Balf.f. & Forrest
     Rhododendron pubigermen J.J.Sm.
     Rhododendron pubigermen var. banghamiorum J.J.Sm.
     Rhododendron pumilum Hook.
     Rhododendron quadrasianum f. halconense H.F.Copel.
     Rhododendron quadrasianum f. pulogense H.F.Copel.
     Rhododendron quadrasianum S.Vidal
     Rhododendron quadrasianum subsp. angustissimum (Sleumer) Argent
     Rhododendron quadrasianum var. rosmarinifolium (S.Vidal) H.F.Copel.
     Rhododendron quadrisianum var. cuneifolium Stapf & H.F.Copel.
     Rhododendron quinquefolium Bisset & S.Moore
     Rhododendron racemosum Franch.
     Rhododendron radians var. minahasae Sleumer
     Rhododendron rarilepidotum J.J.Sm.
     Rhododendron rarum Schltr.
     Rhododendron recurvum Balf.f. & Forrest
     Rhododendron redowskianum Maxim.
     Rhododendron repens Balf.f. & Forrest
     Rhododendron reticulatum D.Don ex G.Don
     Rhododendron retivenium Sleumer
     Rhododendron retusum (Blume) Benn.
     Rhododendron rex H.Lév.
     Rhododendron rhaibocarpum Balf.f. & W.W.Sm.
     Rhododendron rhodoleucum Sleumer
     Rhododendron rhombicum Miq.
     Rhododendron rigidum Franch.
     Rhododendron ripense Makino
     Rhododendron robinsonii Ridl.
     Rhododendron roseotinctum Balf.f. & Forrest
     Rhododendron roseum Loisel. & Rehder
     Rhododendron rosmarinifolium Dippel
     Rhododendron roxieanum Forrest
     Rhododendron roxieanum var. oreonastes (Balf.f. & Forrest) T.L.Ming
     Rhododendron rubiginosum Franch.
     Rhododendron rubineiflorum Craven
     Rhododendron rubineiflorum Craven x R. inconspicuum J.J.Sm.
     Rhododendron rubro-pilosum Hayata
     Rhododendron rufescens Franch.
     Rhododendron rufosquamosum Hutch.
     Rhododendron rufum Batalin
     Rhododendron rugosum Hook.f.
     Rhododendron rupicola var. chryseum (Balf.f. & Kingdon-Ward) Philipson & M.N.Philipson
     Rhododendron rupicola var. muliense (Balf.f. & Forrest) Philipson & M.N.Philipson
     Rhododendron rupicola W.W.Sm.
     Rhododendron rupicola W.W.Sm. x R. fastigiatum Franch.
     Rhododendron russatum Balf.f. & Forrest
     Rhododendron ruttenii J.J.Sm.
     Rhododendron saluenense Franch.
     Rhododendron saluenense subsp. chameunum (Balf.f. & Forrest) Cullen
     Rhododendron sanctum Nakai
     Rhododendron sanguineum Franch.
     Rhododendron saruwagedicum F.Först.
     Rhododendron scabridibracteum Sleumer
     Rhododendron scabrifolium Franch.
     Rhododendron scabrifolium var. pauciflorum Franch.
     Rhododendron scabrifolium var. spiciferum (Franch.) Cullen
     Rhododendron scabrum G.Don
     Rhododendron schadenbergii Warb.
     Rhododendron schizopeplum Balf.f. & Forrest
     Rhododendron schlechteri Lauterb.
     Rhododendron schlippenbachii Maxim.
     Rhododendron scortechinii King & Gamble
     Rhododendron searleanum Sleumer
     Rhododendron selense Franch.
     Rhododendron semibarbatum Maxim.
     Rhododendron seniavinii Maxim.
     Rhododendron seranicum J.J.Sm.
     Rhododendron serpyllifolium (A.Gray) Miq.
     Rhododendron serrulatum (Small) Millais
     Rhododendron sessilifolium J.J.Sm.
     Rhododendron setiferum Balf.f. & Forrest
     Rhododendron setosum D.Don
     Rhododendron sheltonae Hemsl. & E.H.Wilson
     Rhododendron sidereum Balf.f.
     Rhododendron siderophyllum Franch.
     Rhododendron sigillatum Balf.f. & Forrest
     Rhododendron simiarum Hance
     Rhododendron simsii Planch.
     Rhododendron simsii var. mesembrinum (Balf.f. & Forrest) Rehder
     Rhododendron sinense (Lodd.) Sweet
     Rhododendron sinofalconeri Balf.f.
     Rhododendron sinogrande Balf.f. & W.W.Sm.
     Rhododendron smirnowii Trautv.
     Rhododendron smithii Nutt.
     Rhododendron solitarium Sleumer
     Rhododendron souliei Franch.
     Rhododendron sperabiloides Tagg & Forrest
     Rhododendron sphaeranthum Balf.f. & W.W.Sm.
     Rhododendron sphaeroblastum Balf.f. & Forrest
     Rhododendron spiciferum Franch.
     Rhododendron spinuliferum Franch.
     Rhododendron stamineum Franch.
     Rhododendron stapfianum Hemsl. ex Prain
     Rhododendron stenaulum Balf.f. & W.W.Sm.
     Rhododendron stenophyllum Hook.f. ex Becc.
     Rhododendron stewartianum Diels
     Rhododendron strigillosum Franch.
     Rhododendron suaveolens Sleumer
     Rhododendron sublanceolatum Miq.
     Rhododendron subsessile Rendle
     Rhododendron sulfureum Franch.
     Rhododendron sumatranum Merr.
     Rhododendron superbum Sleumer
     Rhododendron surugaense Sugim. ex Kurata
     Rhododendron sutchuenense Franch.
     Rhododendron taggianum Hutch.
     Rhododendron taliense Franch.
     Rhododendron tanastylum Balf.f. & Kingdon-Ward
     Rhododendron tapetiforme Balf.f. & Kingdon-Ward
     Rhododendron tashiroi Maxim.
     Rhododendron tatsienense Franch.
     Rhododendron taxifolium Merr.
     Rhododendron telmateium Balf.f. & W.W.Sm.
     Rhododendron telopeum Balf.f. & Forrest
     Rhododendron temenium Balf.f. & Forrest
     Rhododendron tephropeplum Balf.f. & Forrest
     Rhododendron thymifolium Maxim.
     Rhododendron thymifolium Maxim. x R. telmateium Balf.f. & W.W.Sm.
     Rhododendron timeteum Balf.f. & Forrest
     Rhododendron tintinnabellum Danet
     Rhododendron tomentosum Harmaja
     Rhododendron torquatum Balf.f. & Farrer
     Rhododendron tosaense Makino
     Rhododendron traillianum Forrest & W.W.Sm.
     Rhododendron trichanthum Rehder
     Rhododendron trichocladum Franch.
     Rhododendron trichostomum Franch.
     Rhododendron trinerve Franch. ex H.Boissieu
     Rhododendron triplonaevium Balf.f. & Forrest
     Rhododendron tritifolium Balf.f. & Forrest
     Rhododendron tsangii Merr.
     Rhododendron tschonoskii Maxim.
     Rhododendron tsoi Merr.
     Rhododendron tsusiophyllum Sugim.
     Rhododendron umbelliferum H.Lév.
     Rhododendron ungernii Trautv.
     Rhododendron uvariifolium Diels
     Rhododendron vaccinioides Hook.
     Rhododendron vandeursenii Sleumer
     Rhododendron vaseyi A.Gray
     Rhododendron veitchianum Hook.
     Rhododendron vernicosum Franch.
     Rhododendron verticillatum H.Low ex Lindl.
     Rhododendron vestitum Tagg & Forrest
     Rhododendron vicinum Balf.f. & Forrest
     Rhododendron vidalii Rolfe
     Rhododendron virgatum Hook.
     Rhododendron virgatum subsp. oleifolium (Franch.) Cullen
     Rhododendron virgatum var. triflorum Hook.f.
     Rhododendron viscosum (L.) Torr.
     Rhododendron viscosum (L.) Torr. x R. arborescens (Pursh) Torr.
     Rhododendron viscosum (L.) Torr. x R. cumberlandense E.L.Braun
     Rhododendron viscosum var. serrulatum (Small) H.E.Ahles
     Rhododendron vitis-idaea Sleumer
     Rhododendron wadanum Makino
     Rhododendron wardii W.W.Sm.
     Rhododendron watsonii Hemsl. & E.H.Wilson
     Rhododendron westlandii Hemsl.
     Rhododendron weyrichii Maxim.
     Rhododendron williamsii Merr. ex H.F.Copel.
     Rhododendron wilsonae Hemsl. & E.H.Wilson
     Rhododendron wiltonii Hemsl. & E.H.Wilson
     Rhododendron womersleyi Sleumer
     Rhododendron wrayi King & Gamble
     Rhododendron wrightianum Koord.
     Rhododendron x pulchrum Sweet
     Rhododendron x viscosepalum Rehder
     Rhododendron xanthostephanum Merr.
     Rhododendron yakushimanum Nakai
     Rhododendron yedoense Maxim.
     Rhododendron yedoense Maxim. ex Regel
     Rhododendron yelliottii Warb.
     Rhododendron yongii Argent
     Rhododendron yungningense Balf.f. ex Hutch.
     Rhododendron yunnanense Franch.
     Rhododendron zaleucum Balf.f. & W.W.Sm.
     Rhododendron zeylanicum Booth
     Rhododendron zoelleri Warb.
     Rhododendron zollingeri J.J.Sm.