J.B. Ellis, B.M. Everhart, and E. Bartholomew [1501-5100, plus extras]

Charles Gardner Shaw Mycological Herbarium, Washington State University
Catalog #: WSP5860
E. Bartholomew; Bethel s.n. 07 August 1908
Podosphaera oxyacanthae (DC.) de Bary
United States, Colorado, Eldorado Springs