Marts 2023
Rhododendron aberconwayi Cowan
Rhododendron adamsii Rehder
Rhododendron adenogynum Diels
Rhododendron adenopodum Franch.
Rhododendron adenosum Davidian
Rhododendron afghanicum Aitch. & Hemsl.
Rhododendron aganniphum Balf.f. & Kingdon-Ward
Rhododendron aganniphum ssp. doshongense
Rhododendron aganniphum ssp. flavorufum
Rhododendron aganniphum ssp. glaucopeplum
Rhododendron aganniphum ssp. schizopeplum
Rhododendron alabamense Rehder
Rhododendron albertsenianum Forrest
Rhododendron albiflorum Hook.
Rhododendron albrechtii Maxim.
Rhododendron alutaceum Balf.f. & W.W.Sm.
Rhododendron alutaceum ssp. iodes
Rhododendron alutaceum ssp. russotinctum
Rhododendron alutaceum ssp. triplonaevium
Rhododendron alutaceum ssp. tritifolium
Rhododendron amagianum (Makino) Makino ex Hara
Rhododendron ambiguum Hemsl.
Rhododendron amesiae Rehder & E.H.Wilson
Rhododendron amundsenianum Hand.-Mazz.
Rhododendron annae Franch.
Rhododendron annae ssp. laxiflorum
Rhododendron anthopogon D .Don
Rhododendron anthopogonoides Maxim.
Rhododendron anthrosphaerum
Rhododendron anwheriense
Rhododendron aperantum Balf.f. & Ward
Rhododendron araiophyllum Balf.f. & W.W.Sm.
Rhododendron araiophyllum ssp. lapidosum.
Rhododendron arborescens Torr.
Rhododendron arborescens ? Torr.
Rhododendron arboreum ssp. arboreum.
Rhododendron arboreum ssp. albotomentosum
Rhododendron arboreum ssp. cinnamomeum var. roseum
Rhododendron arboreum ssp. nilagiricum
Rhododendron arboreum ssp. zeylanicum
Rhododendron argipeplum Balf.f. & Cooper
Rhododendron argyrophyllum Franch.
Rhododendron argyrophyllum ssp. nankingense
Rhododendron argyrophyllum var. cupulare
Rhododendron argyrophyllum ssp. omeiense
Rhododendron arizelum Balf.f. & Forrest
Rhododendron arizelum var. rubicosum
Rhododendron asterochnoum Diels
Rhododendron atlanticum Rehder
Rhododendron atropurpureum Sleumer
Rhododendron atrovirens Franch.
Rhododendron augustinii Hemsl.
Rhododendron augustinii ssp. bergii
Rhododendron augustinii ssp. chasmanthum
Rhododendron augustinii ssp. hardyi
Rhododendron aureodorsale (W.P .Fang ex J.Q.Fu) Y.P.Ma & J.Nielsen
Rhododendron aureum ssp. aureum
Rhododendron aureum ssp. hypopitys
Rhododendron aureum ssp. hypopitys
Rhododendron auriculatum Hemsl.
Rhododendron auritum Tagg
Rhododendron austrinum Rehder