Basionym Name:Erysiphe penicillata var. viburni-opuli Fr., Syst. mycol. (Lundae) 3(1): 244 (1829)
Homotypic synonyms:Microsphaera viburni-opuli (Fr.) Cif. & Camera, Quad. Ist. Bot. Univ. Pavia 21: 21 (1962)