Name requested: Erysiphe communis forma succisaeMycology and Phytopathology 11 (3): 207.
Heterotypic synonym: Erysiphe knautiaeMycotaxon 18 (1): 120. Sydowia 29 (1-6): 79. 34: 260.
Heterotypic synonym: Erysiphe communis forma knautiaeMycology and Phytopathology 11 (3): 207.