Ellis, N. Amer. FungiJ.B. Ellis [1 - 1500, plus extras]
Miami University, Willard Sherman Turrell Herbarium
G. Martin #557b 00 November 1880
Sphaerotheca humuli (DC.) Burrill
United States, Pennsylvania, Chester, West Chester
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University of Wisconsin-Madison Herbarium
G. Martin #557b 00 November 1880
Sphaerotheca humuli (DC.) Burrill
United States, Pennsylvania, Chester, West Chester
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Michigan State University Herbarium non-lichenized fungi
George Martin s.n. 00 November 1880
Spaherotheca castagnei
United States, Pennsylvania, West Chester;
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USDA United States National Fungus Collections
Martin George s.n. 00 November 1880
Sphaerotheca humuli var. fuliginea (Schltdl.) E.S. Salmon
United States, Pennsylvania, West Chester
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