H.H. Whetzel and J.McL Waterston [1-200]

Iowa State University, Ada Hayden Herbarium
Catalog #: ISC-F-0125192
H. H. Whetzel #s.n. 03 May 1922
Erysiphe pisi DC.
Netherlands, Paget

University of Wisconsin-Madison Herbarium
Catalog #: WIS-F-0069734
Whetzel #s.n. 03 May 1922
Erysiphe polygoni DC.

USDA United States National Fungus Collections
Catalog #: BPI 565181
Whetzel H. H. s.n. 03 May 1922
Erysiphe polygoni DC.
Netherlands, Paget

USDA United States National Fungus Collections
Catalog #: BPI 1045227
Whetzel H. H. s.n. 03 May 1922
Erysiphe polygoni DC.
Bermuda, Paget, Netherlands