Ellis & Everhart, N. Amer. Fungi. Ser. II
J.B. Ellis ; B.M. Everhart [1501-3600, plus extras]

University of Nebraska State Museum, C.E. Bessey Herbarium - Fungi
Catalog #: NEB00052546
Dr. H. W. Harkness s.n. 00 June 1887
Erysiphe trina Harkn.
United States, California, Marin, Tamalpais;

University of Nebraska State Museum, C.E. Bessey Herbarium - Fungi
Catalog #: NEB00052549
Dr. H. W. Harkness s.n. 00 June 1887
Erysiphe trina Harkn.
United States, California, Marin, Tamalpais;

Miami University, Willard Sherman Turrell Herbarium
Catalog #: 000229763
H. W. Harkness #2337 00 June 1887
Erysiphe trina Harkn.
United States, California, Marin, Tamalpais

Academy of Natural Sciences of Drexel University
Catalog #: PH00047503
H. W. Harkness #s.n. 00 June 1887
Erysiphe trina Harkn.
United States, California, Marin, Tamalpais

Academy of Natural Sciences of Drexel University
Catalog #: PH00302538
H. W. Harkness #s.n. 00 June 1887
Erysiphe trina Harkn.
United States, California, Marin, Tamalpais

Michigan State University Herbarium non-lichenized fungi
Catalog #: MSC0255722
H.W. Harkness s.n. 00 June 1887
Erysiphe trina Harkn.
United States, California, Tamalpais;

USDA United States National Fungus Collections
Catalog #: BPI 563916
Harkness H. W. s.n. 00 June 1887
Erysiphe trina Harkn.
United States, California, Tamalpais

USDA United States National Fungus Collections
Catalog #: BPI 959806
Harkness, H.W. s.n. 00 June 1887
Erysiphe trina Harkn.
United States, California, Tamalpais

University of Illinois Fungarium - Fungi
Catalog #: ILL00099567
HW Harkness s.n. 00 June 1887
Erysiphe trina Harkn.
United States, California, Marin, Tamalpais; Tamalpais

Wisconsin State Herbarium, Fungi
Catalog #: WIS-F-0089170
HW Harkness s.n. 00 June 1887
Erysiphe trina Harkn.
United States, California, Marin, Tamalpais