(_Rhododendron_ 'Erika' x _griersonianum_ Balf.f. & Forrest hybrid) x _williamsianum_ Rehder & E.H.Wilson
19568780 Cultivated material
Rhododendron 'Bright Forecast'
19598015 Cultivated material
19990996 Cultivated material
Rhododendron 'Dr H.C. Karl Forster'
19577107 Cultivated material
Rhododendron 'Fancy Free'
19971145 Uncertain
Rhododendron 'Fastuosum Flore Pleno'
19698568 Cultivated material
20010810 Cultivated material
Rhododendron 'Fireball'
19922410 Cultivated material
20000777 Cultivated material
20052550 Cultivated material
Rhododendron 'Flashlight'
19587101 Cultivated material
Rhododendron 'Fragrantissimum'
19599535 Cultivated material
19697624 Cultivated material
Rhododendron 'Frills'
19871931 Cultivated material
Rhododendron 'Fritz Henssler'
19577116 Cultivated material