Department of Botany and Plant Pathology, Oklahoma Agriculture and Mech. College

USDA United States National Fungus Collections
Catalog #: BPI 555965
Stratton Robert s.n. 02 November 1941
Microsphaera alni (DC.) G. Winter
United States, Oklahoma, Stringtown

USDA United States National Fungus Collections
Catalog #: BPI 555972
Stratton Robert s.n. 02 November 1941
Microsphaera alni (DC.) G. Winter
United States, Oklahoma, Stringtown

USDA United States National Fungus Collections
Catalog #: BPI 555981
Stratton Robert s.n. 02 November 1941
Microsphaera alni (DC.) G. Winter
United States, Oklahoma, Stringtown