Ellis, N. Amer. Fungi
J.B. Ellis [1 - 1500, plus extras]

USDA United States National Fungus Collections
Catalog #: BPI 958538
s.n.
Polyporus leucospongia Cooke & Harkn.
United States

University of Nebraska State Museum, C.E. Bessey Herbarium - Fungi
Catalog #: NEB00066247
Dr. H. W. Harkness s.n.
Polyporus leucospongia Cooke
United States, California, Sierra Nevada Mts.

University of Nebraska State Museum, C.E. Bessey Herbarium - Fungi
Catalog #: NEB00066248
Dr. H. W. Harkness s.n.
Polyporus leucospongia Cooke
United States, California, Sierra Nevada Mts.

Chrysler Herbarium - Mycological Collection
Catalog #: CHRB-F-0016687
Dr. H. W. Harkness. s.n.
Polyporus leucospongia Cooke & Harkn.
United States, California, Sierra Nevada Mts.

Michigan State University Herbarium non-lichenized fungi
Catalog #: MSC0254370
H. W. Harkness s.n.
Polyporus leucospongia Cooke
United States, California, Sierra Nevada mts

Miami University, Willard Sherman Turrell Herbarium
Catalog #: 000193507
H. W. Harkness #1104
Polyporus leucospongia Cooke

University of Michigan Herbarium
Catalog #: 150908
H. W. Harkness #s. n.
Polyporus leucospongia Cooke
USA, California, Sierra Nevada Mts.

USDA United States National Fungus Collections
Catalog #: BPI 211672
Harkness H. W. s.n.
Polyporus leucospongia Cooke & Harkn.
United States, California, Sierra Nevada Mountains alt. 7000 ft.

University of Illinois Herbarium
Catalog #: ILL00098329
HW Harkness s.n.
Polyporus leucospongia Cooke
United States, California, California

University of Wisconsin-Madison Herbarium
Catalog #: WIS-F-0087867
HW Harkness s.n.
Polyporus leucospongia Cooke
United States, California, California