P. Sydow and W. Zopf [1-4900]
Iowa State University, Ada Hayden Herbarium
s.n. 00 September 1884
Helotium cyathoideum var. albidulum (Hedw.) P. Karst.
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USDA United States National Fungus Collections
P. Sydow #s. n. 00 August 1884
Ustilago major J. Schröt.
Germany, Westend, Berlin
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