Anonymous, Calif. Fungi
Herbarium of the University of California. [1- ? 1425]

Washington State University, Charles Gardner Shaw Mycological Herbarium
Catalog #: WSP39072
M. A. Nobs; S. Galen Smith s.n. 20 July 1949
Claviceps nigricans Tul.
United States, California, Lassen, east of Bieber

Michigan State University Herbarium
Catalog #: MSC0214090
M. A. Nobs; S. Galen Smith s.n. 20 July 1949
Claviceps nigricans Tul.
United States, California, Lassen, E of Bieber

Iowa State University, Ada Hayden Herbarium
Catalog #: ISC-F-0066871
M.A. Nobs s.n. 20 July 1949
Claviceps nigricans Tul.
USA, California, Lassen, In a dry vernal ditch, east of Bieber

University of Wisconsin-Madison Herbarium
Catalog #: WIS-F-0003634
M.A. Nobs #s.n. 20 July 1949
Claviceps nigricans Tul.
United States, California, Lassen, Lassen, Modoc, and Shasta counties; east of Bieber

Field Museum of Natural History
Catalog #: C0258306F
M.A. Nobs #s.n. 20 July 1949
Claviceps nigricans Tul.
USA, California, Lassen, Bieber; E of Bieber