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

USDA United States National Fungus Collections
Catalog #: BPI 443219
Ray W. W. s.n. 22 July 1943
Heterosporium gracile (Wallr.) Sacc.
United States, Oklahoma, Stillwater

USDA United States National Fungus Collections
Catalog #: BPI 443221
Ray W. W. s.n. 22 July 1943
Heterosporium gracile (Wallr.) Sacc.
United States, Oklahoma, Stillwater

USDA United States National Fungus Collections
Catalog #: BPI 443222
Ray W. W. s.n. 22 July 1943
Heterosporium gracile (Wallr.) Sacc.
United States, Oklahoma, Stillwater

University of Wisconsin-Madison Herbarium
Catalog #: WIS-F-0019658
W. W. Ray #2903 23 July 1943
Heterosporium gracile (Wallr.) Sacc.
United States, Oklahoma, Stillwater;