P. Sydow and W. Zopf [1-4900]

Iowa State University, Ada Hayden Herbarium
Catalog #: ISC-F-0126042
s.n. 00 September 1884
Helotium cyathoideum var. albidulum (Hedw.) P. Karst.

USDA United States National Fungus Collections
Catalog #: BPI 1054436
P. Sydow #s. n. 00 August 1884
Ustilago major J. Schröt.
Germany, Westend, Berlin