J.T.C. Vestergren [1-1800, plus extras]

University of Nebraska State Museum, C.E. Bessey Herbarium - Fungi
Catalog #: NEB00076931
Tycho Vestergren s.n. 00 June 1901
Pyrenophora helvetica (Niessl) Sacc.
Sweden, Lapponia Lulensis, alpes Sarjekenses, Puorek

USDA United States National Fungus Collections
Catalog #: BPI 627861
Vestergren Tycho s.n. 29 June 1901
Pyrenophora helvetica (Niessl) Sacc.
Sweden, Lapponia Lulensis, Alpes Sarjekenses, Puorek

USDA United States National Fungus Collections
Catalog #: BPI 627862
Vestergren Tycho s.n. 29 June 1901
Pyrenophora helvetica (Niessl) Sacc.
Sweden, Lapponia Lulensis, Alpes Sarjekenses, Puorek

USDA United States National Fungus Collections
Catalog #: BPI 1038448
Vestergren Tycho s.n. 29 June 1901
Pyrenophora helvetica (Niessl) Sacc.
Sweden, Lapponia Lulensis, Alpes Sarjekenses, Puorek

USDA United States National Fungus Collections
Catalog #: BPI 1038449
Vestergren Tycho s.n. 29 June 1901
Pyrenophora helvetica (Niessl) Sacc.
Sweden, Lapponia Lulensis, Alpes Sarjekenses, Puorek