R. Ciferri [1-425, plus extras]

Cornell University, Plant Pathology Herbarium
Catalog #: Ciferri,M.Dom.0115
s.n.
Microsphaera diffusa Cooke & Peck
Dominican Republic

USDA United States National Fungus Collections
Catalog #: BPI 949483
s.n.
Microsphaera diffusa Cooke & Peck
Dominican Republic

Purdue University, Kriebel Herbarium
Catalog #: PUL00027324
R Ciferri, AM Borgna Ciferri, and EL Ekman s.n. 23 November 1930
Microsphaera diffusa Cooke & Peck
Republica Dominicana, Valle del Cibao, Santiago, Cuesta de Piedras