Plants with Scientific Names beginning with the letter "R"

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• Rhododendron erosipetalum
• Rhododendron erosum
• Rhododendron erubescens
• Rhododendron erythrocalix
• Rhododendron erythrocalyx
• Rhododendron esetulosum
• Rhododendron Ethel Group
• Rhododendron euchaites
• Rhododendron euchroum
• Rhododendron eudoxum
• Rhododendron eudoxum var. brunneifolium
• Rhododendron eudoxum var. eudoxum
• Rhododendron eudoxum var. mesopolium
• Rhododendron euonymifolium
• Rhododendron eurysiphon
• Rhododendron eurysiphon Arduaine form
• Rhododendron Everred = '851C'
• Rhododendron exasperatum
• Rhododendron Exburiense Group
• Rhododendron excellens
• Rhododendron exquisitum
• Rhododendron exuberans
• Rhododendron eymae
• Rhododendron F.C. Puddle Group
• Rhododendron faberi
• Rhododendron faberi subsp. prattii
• Rhododendron faberioides
• Rhododendron Fabia Group
• Rhododendron facetum
• Rhododendron facetum hybrid
• Rhododendron facetum × griersonianum
• Rhododendron facium
• Rhododendron Fairy Light Group
• Rhododendron faithae
• Rhododendron falconeri
• Rhododendron falconeri eximium
• Rhododendron falconeri falconeri
• Rhododendron falconeri hybrid
• Rhododendron falconeri subsp. eximium
• Rhododendron fallacinum
• Rhododendron Fancy Free Group
• Rhododendron Fandango Group
• Rhododendron fangchengense
• Rhododendron fargesii
• Rhododendron farinosum
• Rhododendron farrerae
• Rhododendron fastigiatum 'Blue Steel'
• Rhododendron fastigiatum 'Harry White'
• Rhododendron fastigiatum pink
• Rhododendron faucium
• Rhododendron fauriae
• Rhododendron fauriei
• Rhododendron feddei
• Rhododendron ferrugineum
• Rhododendron ferrugineum 'Hill of Tarvit'
• Rhododendron ferrugineum 'Plenum'
• Rhododendron ferrugineum 'Shamrock'
• Rhododendron ferrugineum Ascreavie form
• Rhododendron ferrugineum Atrococcineum Group
• Rhododendron ferrugineum f. album
• Rhododendron ferrugineum Glenarn form
• Rhododendron FH134
• Rhododendron fictolacteum
• Rhododendron fictolacteum var. miniforme
• Rhododendron Fine Feathers Group
• Rhododendron Fire Bird Group
• Rhododendron Firedrake Group
• Rhododendron fittianum
• Rhododendron Flamingo Group
• Rhododendron flammeum
• Rhododendron Flashlight Group
• Rhododendron flaum
• Rhododendron flavantherum
• Rhododendron flavidum
• Rhododendron flavidum 'Album'
• Rhododendron flavidum hybrid
• Rhododendron flavidum var. flavidum
• Rhododendron flavidum × Rhododendron 'Lady Rosebery'
• Rhododendron flavorufum
• Rhododendron flavum
• Rhododendron flavum album
• Rhododendron fletcheranum
• Rhododendron fletcherianum
• Rhododendron fletcherianum 'Yellow Bunting'
• Rhododendron fleuryi
• Rhododendron flinckii
• Rhododendron floccigerum
• Rhododendron floccigerum bicolored
• Rhododendron floccigerum subsp. appropinquans
• Rhododendron floribundum 'Swinhoe'
• Rhododendron florulentum
• Rhododendron flumineum
• Rhododendron fokienense
• Rhododendron fordii
• Rhododendron formosanum
• Rhododendron formosum var. formosum
• Rhododendron formosum var. formosum 'Khasia'
• Rhododendron formosum var. formosum Iteaphyllum Group
• Rhododendron formosum var. inaequale
• Rhododendron forrestii
• Rhododendron forrestii 'Branklyn'
• Rhododendron forrestii forrestii
• Rhododendron forrestii forrestii Repens Group
• Rhododendron forrestii forrestii × Rhododendron 'Professor F. Bettex'
• Rhododendron forrestii group
• Rhododendron forrestii hybrid
• Rhododendron forrestii papillatum
• Rhododendron forrestii subsp. papillatum
• Rhododendron forrestii Tumescens Group
• Rhododendron Fortorb Group
• Rhododendron Fortune Group
• Rhododendron fortunei 'Foxy'
• Rhododendron fortunei 'Lu-Shan'
• Rhododendron fortunei 'Mrs Butler'
• Rhododendron fortunei 'Sir Charles Butler'
• Rhododendron fortunei discolor
• Rhododendron fortunei discolor 'Hilliers Best'
• Rhododendron fortunei discolor 'Random Harvest'
• Rhododendron fortunei discolor Houlstonii Group
• Rhododendron fortunei discolor × 'Lodauric Iceberg'
• Rhododendron fortunei hybrid
• Rhododendron fortunei subsp. discolor
• Rhododendron fortunei var. kwangfuense
• Rhododendron foveolatum
• Rhododendron fragariflorum
• Rhododendron fragariiflorum
• Rhododendron fragariiflorum hybrid
• Rhododendron Francis Hanger
• Rhododendron fuchsiifolium
• Rhododendron fufum
• Rhododendron Fulgarb Group
• Rhododendron fulgens hybrid
• Rhododendron fulgens Leonardslee form
• Rhododendron Full House Group
• Rhododendron fulvoides
• Rhododendron fulvum fulvoides
• Rhododendron fulvum fulvum
• Rhododendron fulvum subsp. fulvoides
• Rhododendron fumidum
• Rhododendron furbishii
• Rhododendron Fusilier Group
• Rhododendron fuyuanense
• Rhododendron gaity × nakaharae 'Mariko'
• Rhododendron galactinum
• Rhododendron gandavense
• Rhododendron gandavense f. plenum
• Rhododendron gandavense var. plenum
• Rhododendron gandavense-Hybride
• Rhododendron gardenia
• Rhododendron Gaul Group
• Rhododendron gaultheriifolium
• Rhododendron genesterianum
• Rhododendron genestierianum
• Rhododendron geraldii
• Rhododendron germanicum
• Rhododendron Gibraltar Group
• Rhododendron gibsonii
• Rhododendron Gillii Group
• Rhododendron Gipsy King Group
• Rhododendron giraudiasii
• Rhododendron giulianetti
• Rhododendron Gladys Group
• Rhododendron Glamour Group
• Rhododendron glanduliferum
• Rhododendron glandulostylum
• Rhododendron glandulosum
• Rhododendron glaphyrum
• Rhododendron glaucopeplum
• Rhododendron glaucophyllum
• Rhododendron glaucophyllum 'Branklyn'
• Rhododendron glaucophyllum 'Glenarn'
• Rhododendron glaucophyllum 'Len Beer'
• Rhododendron glaucophyllum 'Prostratum'
• Rhododendron glaucophyllum Borde Hill form
• Rhododendron glaucophyllum tubiforme
• Rhododendron glaucophyllum var. album
• Rhododendron glaucophyllum var. glaucophyllum
• Rhododendron glischroides
• Rhododendron glischroides 'Glister'
• Rhododendron glischrum
• Rhododendron glischrum 'Glister'
• Rhododendron glischrum glischroides
• Rhododendron glischrum glischrum
• Rhododendron glischrum rude
• Rhododendron glischrum subsp. rude
• Rhododendron globigerum
• Rhododendron glomerulatum
• Rhododendron gnaphalocarpum
• Rhododendron Goblin Group
• Rhododendron Golden Horn Group
• Rhododendron Golden Oriole Group
• Rhododendron Goldfinch Group
• Rhododendron Goldschatz = 'Goldprinz'
• Rhododendron gonggashanense
• Rhododendron gongshanense
• Rhododendron goodenoughii
• Rhododendron gracilentum
• Rhododendron gracilentum × leptanthum
• Rhododendron grande pink-flowered
• Rhododendron Grenadier Group
• Rhododendron Grenadine Group
• Rhododendron Grierocaster Group
• Rhododendron griersonianum
• Rhododendron griersonianum hybrid
• Rhododendron griersonianum × yakushimanum
• Rhododendron griersopianum x haematodes 'Mayday'
• Rhododendron griffithianum
• Rhododendron griffithianum hybrid
• Rhododendron griffithianum × 'Naomi Exbury'
• Rhododendron griffithianum × praevernum
• Rhododendron griffithianum × thomsonii
• Rhododendron groenlandicum
• Rhododendron Grosclaude Group
• Rhododendron guangnanense
• Rhododendron Guardsman Group
• Rhododendron guizhouense
• Rhododendron gymnanthum
• Rhododendron gymnocarpum
• Rhododendron gymnogynum
• Rhododendron habrotrichum
• Rhododendron haemaleum
• Rhododendron haematocheilum
• Rhododendron haematodes
• Rhododendron haematodes 'Blood Red'
• Rhododendron haematodes chaetomallum
• Rhododendron haematodes ex Hobbie
• Rhododendron haematodes Franch. 'Bremen'
• Rhododendron haematodes Franch. 'China Boy'
• Rhododendron haematodes haematodes
• Rhododendron haematodes haemotodes
• Rhododendron haematodes subsp. chaetomallum
• Rhododendron hainanense
• Rhododendron Halcyone Group
• Rhododendron hanceanum
• Rhododendron hanceanum 'Canton Consul'
• Rhododendron hanceanum Nanum Group
• Rhododendron hanceanum var. nanum 'Canton Consul'
• Rhododendron hanceanum × lutescens
• Rhododendron hancockii
• Rhododendron hannoense
• Rhododendron haofui
• Rhododendron Happy Group
• Rhododendron hardingii
• Rhododendron hardyi
• Rhododendron Harmony Group
• Rhododendron harrovianum
• Rhododendron Hawk Group
• Rhododendron headforthianum
• Rhododendron headfortianum
• Rhododendron heatheriae
• Rhododendron Hebe Group
• Rhododendron hedyosmum
• Rhododendron heftii
• Rhododendron heishuiense
• Rhododendron hejiangense
• Rhododendron heliolepis
• Rhododendron heliolepis var. brevistylum
• Rhododendron heliolepis var. heliolepis
• Rhododendron heliolepis var. heliolepsis F 6762
• Rhododendron hellwigii
• Rhododendron hemidartum
• Rhododendron hemitrichotum
• Rhododendron hemsleyanum
• Rhododendron hemsleyanum × Polar Bear Group
• Rhododendron hemsleyanum × ungernii
• Rhododendron henanense
• Rhododendron henanense subsp. lingbaoense
• Rhododendron henryi
• Rhododendron henryi var. pubescens
• Rhododendron heptamerum
• Rhododendron Hermes Group
• Rhododendron herpesticum
• Rhododendron herzogii
• Rhododendron herzogii hybrid
• Rhododendron herzogii × konori
• Rhododendron herzogii × macgregoriae
• Rhododendron Hesperides Group
• Rhododendron hesperium
• Rhododendron heteroclitum
• Rhododendron hidakanum
• Rhododendron himantodes
• Rhododendron himertum
• Rhododendron hippophaeoides
• Rhododendron hippophaeoides 'Bei-ma-shan'
• Rhododendron hippophaeoides 'Blue Silver'
• Rhododendron hippophaeoides 'Glendoick Iceberg'
• Rhododendron hippophaeoides 'Haba Shan'
• Rhododendron hippophaeoides 'Inshriach'
• Rhododendron hippophaeoides Balf.f. & W.W.Sm. 'Be Ma Shan'
• Rhododendron hippophaeoides hybrid
• Rhododendron hippophaeoides var. hippophaeoides
• Rhododendron hippophaeoides var. hippophaeoides 'Sunningdale'
• Rhododendron hippophaeoides var. hippophaeoides Fimbriatum Group
• Rhododendron hippophaeoides var. occidentale
• Rhododendron hirsitum
• Rhododendron hirsuticostatum
• Rhododendron hirsutipetiolatum
• Rhododendron hirsutum
• Rhododendron hirsutum 'Flore Pleno'
• Rhododendron hirsutum f. albiflorum
• Rhododendron hirtipes
• Rhododendron hirtipes 'Ita'
• Rhododendron hispidum
• Rhododendron hodginsii
• Rhododendron hodgsonii
• Rhododendron hodgsonii 'Poet's Lawn'
• Rhododendron hodgsonii hybrid
• Rhododendron hodgsonii SU 323
• Rhododendron hongkongense
• Rhododendron hookeri 'Golden Gate'
• Rhododendron hookeri Tigh-na-Rudha form
• Rhododendron horaeum
• Rhododendron horlickianum
• Rhododendron hormophorum
• Rhododendron hortense
• Rhododendron Hotspur Group
• Rhododendron houlstonii
• Rhododendron huadingense
• Rhododendron huanum
• Rhododendron huguangense
• Rhododendron huianum
• Rhododendron huidongense
• Rhododendron huiyangense
• Rhododendron Humming Bird Group
• Rhododendron hunanense
• Rhododendron hunnewellianum
• Rhododendron hunnewellianum hunnewellianum
• Rhododendron hunnewellianum subsp. rockii
• Rhododendron Huntsman Group
• Rhododendron hutchinsonianum
• Rhododendron hyacinthosmum
• Rhododendron hybrid
• Rhododendron hybrid cultivars
• Rhododendron hybrid No 4202
• Rhododendron hylaeum
• Rhododendron hylothreptum
• Rhododendron hymenanthes
• Rhododendron hypenanthum
• Rhododendron Hyperion Group
• Rhododendron hyperythrum
• Rhododendron hyperythrum fauriei
• Rhododendron hyperythrum pink-flowered
• Rhododendron hypoblematosum
• Rhododendron hypoglaucum
• Rhododendron hypoglaucum 'Heane Wood'
• Rhododendron hypolepidotum
• Rhododendron hypoleucum
• Rhododendron hypopitys
• Rhododendron hyugaense
• Rhododendron Ibex Group
• Rhododendron Icarus Group
• Rhododendron Idealist Group
• Rhododendron idoneum
• Rhododendron imberbe
• Rhododendron impeditum
• Rhododendron impeditum 'Blue Steel'
• Rhododendron impeditum 'Compactum'
• Rhododendron impeditum 'Drake's Hybrid'
• Rhododendron impeditum 'Harry White's Purple'
• Rhododendron impeditum 'Indigo'
• Rhododendron impeditum 'Johnston's Impeditum'
• Rhododendron impeditum 'Pygmaeum'
• Rhododendron impeditum 'Russell's Blue'
• Rhododendron impeditum Balf.f. & W.W.Sm. 'Blue Tit'
• Rhododendron impeditum Balf.f. & W.W.Sm. 'Blue Wonder'
• Rhododendron impeditum Balf.f. & W.W.Sm. 'Gristede'
• Rhododendron impeditum Balf.f. & W.W.Sm. 'Moerheim'
• Rhododendron impeditum Litangense Group
• Rhododendron impeditum Reuthe's form
• Rhododendron Imperial Princess = 'Moness'
• Rhododendron Imperial Queen = 'Monal'
• Rhododendron Impi Group
• Rhododendron inaequale
• Rhododendron Inamorata Group
• Rhododendron inconspicuum
• Rhododendron inconspicuum × macgregoriae
• Rhododendron inconspicuum × rubineiflorum
• Rhododendron Indiana Group
• Rhododendron indicum
• Rhododendron indicum 'Balsaminiflora'
• Rhododendron indicum 'Balsaminiflorum'
• Rhododendron indicum 'Chinzan'
• Rhododendron indicum 'Crispiflorum'
• Rhododendron indicum 'Flame Creeper'
• Rhododendron indicum 'George L. Taber'
• Rhododendron indicum 'George L. Tabor'
• Rhododendron indicum 'Gion Komachi'
• Rhododendron indicum 'Kogetsu'
• Rhododendron indicum 'Kokinsai'
• Rhododendron indicum 'Macranthum'
• Rhododendron indicum 'Otome No Mai'
• Rhododendron indicum 'Plenum'
• Rhododendron indicum 'Red Bird'
• Rhododendron indicum amoenum
• Rhododendron indicum orange
• Rhododendron inopinum
• Rhododendron insculptum
• Rhododendron insigne 'Annie Darling'
• Rhododendron insigne Hemsl. & E.H.Wilson 'Brigitte'
• Rhododendron insigne hybrid
• Rhododendron insigne Reuthe's form
• Rhododendron insigne var. hejiangense
• Rhododendron insigne × yakushimanum
• Rhododendron insigne-Hybride
• Rhododendron intermedium
• Rhododendron Intermedium Group
• Rhododendron intranervatum
• Rhododendron Intrepid Group
• Rhododendron intricatum
• Rhododendron Intrifast Group
• Rhododendron inundatum
• Rhododendron invasorium
• Rhododendron invictum
• Rhododendron ioanthum
• Rhododendron iodes
• Rhododendron Iola Group
• Rhododendron irroratum
• Rhododendron irroratum 'Langbianense'
• Rhododendron irroratum 'Polka Dot'
• Rhododendron irroratum 'Spatter Paint'
• Rhododendron irroratum irroratum
• Rhododendron irroratum kontumense
• Rhododendron irroratum pale pink
• Rhododendron irroratum pogonostylum
• Rhododendron irroratum subsp. kontumense
• Rhododendron irroratum subsp. pogonostylum
• Rhododendron irroratum white
• Rhododendron irroratum × facetum
• Rhododendron Isabella Group
• Rhododendron Ispahan Group
• Rhododendron Italia Group
• Rhododendron iteaphyllum
• Rhododendron iteophyllum
• Rhododendron Ivanhoe Group
• Rhododendron Iviza Group
• Rhododendron ixeuticum
• Rhododendron Jacques Group
• Rhododendron Jacquetta Group
• Rhododendron Jaipur Group
• Rhododendron Jalisco Group
• Rhododendron Jan Steen Group
• Rhododendron Janet Group
• Rhododendron jangtzowense
• Rhododendron japonica
• Rhododendron japonicum
• Rhododendron japonicum (A.Gray) J.V.Suringar 'Apple Blossom'
• Rhododendron japonicum (A.Gray) J.V.Suringar 'Beethoven'
• Rhododendron japonicum (A.Gray) J.V.Suringar 'Daviesii'
• Rhododendron japonicum (A.Gray) J.V.Suringar 'Esmeralda'
• Rhododendron japonicum (A.Gray) J.V.Suringar 'Favorite'
• Rhododendron japonicum (A.Gray) J.V.Suringar 'Gabriele'
• Rhododendron japonicum (A.Gray) J.V.Suringar 'Gretchen'
• Rhododendron japonicum (A.Gray) J.V.Suringar 'Hatsugiri'
• Rhododendron japonicum (A.Gray) J.V.Suringar 'J.S.Bach'
• Rhododendron japonicum (A.Gray) J.V.Suringar 'Kermesina'
• Rhododendron japonicum (A.Gray) J.V.Suringar 'Madame van Hecke'
• Rhododendron japonicum (A.Gray) J.V.Suringar 'Nana Compressa'
• Rhododendron japonicum (A.Gray) J.V.Suringar 'Purpel Triumph'
• Rhododendron japonicum (A.Gray) J.V.Suringar 'Rosalind'
• Rhododendron japonicum (A.Gray) J.V.Suringar 'Royal Command'
• Rhododendron japonicum (A.Gray) J.V.Suringar 'Rubinstein'
• Rhododendron japonicum (A.Gray) J.V.Suringar 'Schneewittchen'
• Rhododendron japonicum f. flavum
• Rhododendron japonicum f. multifidum
• Rhododendron japonicum var. glaucophyllum
• Rhododendron japonicum-Hybride
• Rhododendron japonoheptamerum
• Rhododendron japonoheptamerum f. leucanthum
• Rhododendron japonoheptamerum var. hondoense
• Rhododendron japonoheptamerum var. kyomaruense
• Rhododendron jasminiflorum var. punctatum
• Rhododendron jasminoides
• Rhododendron javanicum
• Rhododendron javanicum schadenbergii
• Rhododendron javanicum var. javanicum
• Rhododendron javanicum var. teysmannii
• Rhododendron Jean Group
• Rhododendron jenestierianum
• Rhododendron jinchangense
• Rhododendron jinpingense
• Rhododendron jinxiuense
• Rhododendron Joanita Group
• Rhododendron Jock Group
• Rhododendron Johnnie Johnston Group
• Rhododendron johnstoneanum
• Rhododendron johnstoneanum 'Double Diamond'
• Rhododendron johnstoneanum 'Rubeotinctum'
• Rhododendron johnstoneanum 'Rubrotinctum'
• Rhododendron joniense
• Rhododendron Josephine Group
• Rhododendron Jubilee Queen Group
• Rhododendron Jutland Group
• Rhododendron kaempferi
• Rhododendron kaempferi 'Damio'
• Rhododendron kaempferi 'Dorsett'
• Rhododendron kaempferi 'Eastern Fire'
• Rhododendron kaempferi 'Firefly'
• Rhododendron kaempferi 'Hall's Red'
• Rhododendron kaempferi 'Mikado'
• Rhododendron kaempferi 'Mikawana'