Ellis, N. Amer. FungiJ.B. Ellis [1 - 1500, plus extras]
University of Illinois Fungarium - Fungi
Farlow s.n.
Peronospora halstedii var. ambrosioe
United States, Massachusetts, Middlesex, Cambridge; Cambridge
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University of Nebraska State Museum, C.E. Bessey Herbarium - Fungi
Farlow s.n.
Peronospora halstedii var. Ambrosiae
United States, Massachusetts, Cambridge;
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University of Nebraska State Museum, C.E. Bessey Herbarium - Fungi
Farlow s.n.
Peronospora halstedii var. ambrosiae
United States, Massachusetts, Cambridge;
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Michigan State University Herbarium non-lichenized fungi
Farlow s.n.
Peronospora halstedii ambrosiae
United States, Massachusetts, Cambridge;
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Wisconsin State Herbarium, Fungi
Farlow s.n.
Peronospora halstedii var. ambrosioe Farlow
United States, Massachusetts, Middlesex, Cambridge
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USDA United States National Fungus Collections
Farlow #210
Plasmopara halstedii (Farl.) Berl. & De Toni
United States, Massachusetts, Cambridge
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Academy of Natural Sciences of Drexel University
Farlow #s. n.
Plasmopara halstedii (Farl.) Berl. & De Toni
United States, Massachusetts, Middlesex, Cambridge
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Academy of Natural Sciences of Drexel University
Farlow #s.n.
Plasmopara halstedii (Farl.) Berl. & De Toni
United States, Massachusetts, Middlesex, Cambridge
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USDA United States National Fungus Collections
Farlow #s.n.
Peronospora halstedii var. ambrosiae
United States, Massachusetts, Cambridge
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Miami University, Willard Sherman Turrell Herbarium
W. G. Farlow #210
Rysotheca halstedii (Farl.) G.W. Wilson
USA, Massachusetts, Middlesex, Cambridge
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