Brenckle, Fungi Dakot.
J.F. Brenckle [1-675, plus extras]

Cornell University Plant Pathology Herbarium
Catalog #: F.Dakotenses-0621
s.n.
Tylostoma mamosum

Charles Gardner Shaw Mycological Herbarium, Washington State University
Catalog #: WSP23544
O. A. Stevens s.n. 20 August 1926
Tylostoma mamosum
United States, North Dakota, Underwood

University of Nebraska State Museum, C.E. Bessey Herbarium - Fungi
Catalog #: NEB00083492
O. A. Stevens s.n. 20 August 1926
Tylostoma mamosum
United States, North Dakota, Underwood;

University of Wisconsin-Madison Herbarium
Catalog #: WIS-F-0059482
O. A. Stevens #s.n. 20 August 1926
Tylostoma mamosum
United States, North Dakota, Underwood;

Brown University Herbarium
Catalog #: CBRU00011077
OA Stevens s.n. 20 August 1926
Tylostoma mamosum
United States, North Dakota, McLean, Underwood;

Purdue University, Kriebel Herbarium
Catalog #: PUL00023193
OA Stevens s.n. 20 August 1926
Tylostoma mamosum
United States, North Dakota, McLean, Underwood;

USDA United States National Fungus Collections
Catalog #: BPI 729702
Stevens O. A. s.n. 20 August 1926
Tulostoma mammosum Lév.
United States, North Dakota, Underwood

USDA United States National Fungus Collections
Catalog #: BPI 946404
Stevens, O.A. #s. n. 20 August 1926
Tulostoma mammosum Lév.
United States, North Dakota, Underwood