Poelt & Scheuer, Reliqu. Petrak.
Institut für Systematische Botanik der Universität [1-2859]

USDA United States National Fungus Collections
Catalog #: BPI 1111316
Petrak F. s.n. 15 August 1950
Cercospora clavata (W.R. Gerard) Cooke
United States, South Dakota, Mellette