Rhododendron sanguineum var. haemaleum Rhododendron sanguineum var. didymoides Rhododendron sanguineum var. sanguineum Rhododendron sanguineum var. himertum Rhododendron sanguineum var. cloiophorum Rhododendron sanguineum var. didymum
World Flora Online, accessed June 20, 2024