Rehm, Ascomyc.
H. Rehm [1-2175, plus extras]

USDA United States National Fungus Collections
Catalog #: BPI 1005132
s.n.
Erysiphe communis (Wallr.) Schltdl.

Academy of Natural Sciences of Drexel University
Catalog #: PH00302464
#s.n.
Erysiphe circaeae L. Junell
Germany, Berlin