F.K.A.E.J. de Thümen [1-2300, plus extras]

USDA United States National Fungus Collections
Catalog #: BPI 1035587
s.n.
Microstroma quercinum (Opiz) Niessl

USDA United States National Fungus Collections
Catalog #: BPI 408082
MAC Owan s.n. 00 May 1878
Microstroma album (Desm.) Sacc.
South Africa, Cape of Good Hope, Somerset-East

Purdue University, Kriebel Herbarium
Catalog #: PUL00029799
Mac Owan s.n. 00 May 1878
Microstroma quercinum (Opiz) Niessl
South Africa, Somerset East;

University of Nebraska State Museum, C.E. Bessey Herbarium - Fungi
Catalog #: NEB00059970
Prof Mac Owan s.n. 00 May 1878
Microstroma quercinum (Opiz) Niessl
England, Promont. Bonae spei: Somerset-East

University of Illinois Herbarium
Catalog #: ILL00077130
Prof. Mac Owan s.n. 00 May 1878
Microstroma quercinum (Opiz) Niessl