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Subgenus: Rhododendron Section: Rhododendron Subsection: Triflora
Hybridized By: Vuyk van Nes
Hybridized By: Koster & Co.
Subgenus: Rhododendron Section: Rhododendron Subsection: Lapponica
Hybridized By: Rothschild, Edmund Leopold de
Subgenus: Hymenanthes Section: Pontica Subsection: Maculifera
Hybridized By: Dexter, C.O.
Subgenus: Rhododendron Section: Vireya Subsection: Euvireya
Hybridized By: Koster M. & Sons