Thomson, Lich. Wiscon. Exs.
J.W. Thomson [1 - 96]

USDA United States National Fungus Collections
Catalog #: BPI 1033143
Thomson J.W. Jr. #s.n. 16 April 1946
Acarospora cinereoalba (Fink) H. Magn.
United States, Wisconsin, Dane, 2 mi. SE of Madison