A.B. Seymour and F.S. Earle [1-550, plus extras]
USDA United States National Fungus Collections
s.n.
Erysiphe communis (Wallr.) Schltdl.
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USDA United States National Fungus Collections
s.n.
Erysiphe communis (Wallr.) Schltdl.
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Cornell University Plant Pathology Herbarium
Catalog #: S.E.,Econ.F.0464
A. B. Seymour s.n.
Erysiphe communis (Wallr.) Schltdl.
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