(_Rhododendron_ 'Erika' x _griersonianum_ Balf.f. & Forrest hybrid) x _williamsianum_ Rehder & E.H.Wilson
19568780 Cultivated material
Rhododendron 'Countess of Haddington'
19708201 Cultivated material
Rhododendron 'Doctor Herman Sleumer'
19973636 Wild collected in Indonesia
Rhododendron 'Dr H.C. Karl Forster'
19577107 Cultivated material
Rhododendron 'Elisabeth Hobbie'
19577104 Cultivated material
19598113 Cultivated material
19598114 Cultivated material
19598116 Cultivated material
Rhododendron 'Fritz Henssler'
19577116 Cultivated material
Rhododendron 'Harry Tagg'
19715031 Cultivated material
19715033 Cultivated material
19730728 Cultivated material
19819185 Cultivated material
Rhododendron 'Hatsugiri'
19699544 Cultivated material
Rhododendron 'Helene Schiffner'
19881478 Cultivated material
Rhododendron 'Hinode-no-kumo'
19880709 Cultivated material