A.B. Seymour and F.S. Earle [1-550, plus extras]

USDA United States National Fungus Collections
Catalog #: BPI 1020751
s.n.
Erysiphe communis (Wallr.) Schltdl.
United States

USDA United States National Fungus Collections
Catalog #: BPI 1020752
s.n.
Erysiphe communis (Wallr.) Schltdl.
United States

Cornell University, Plant Pathology Herbarium
Catalog #: S.E.,Econ.F.0464
A. B. Seymour s.n.
Erysiphe communis (Wallr.) Schltdl.