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

University of Nebraska State Museum, C.E. Bessey Herbarium - Fungi
Catalog #: NEB00059896
Dr. Geo. A. Rex. s.n.
Microsphaera symphoricarpi Howe
United States, Pennsylvania, Philadelphia;

University of Nebraska State Museum, C.E. Bessey Herbarium - Fungi
Catalog #: NEB00059897
Dr. Geo. A. Rex. s.n.
Microsphaera symphoricarpi Howe
United States, Pennsylvania, Philadelphia;

Michigan State University Herbarium non-lichenized fungi
Catalog #: MSC0254000
Dr. Geo. A. Rex. s.n.
Microsphaera symphoricarpi Howe
United States, Pennsylvania, Philadelphia;

Miami University, Willard Sherman Turrell Herbarium
Catalog #: 000246731
G. A. Rex #768
Microsphaera diffusa Cooke & Peck
United States, Pennsylvania, Philadelphia, Philadelphia

Academy of Natural Sciences of Drexel University
Catalog #: PH00302592
G. A. Rex #s.n.
Microsphaera symphoricarpi Howe
United States, Pennsylvania, Philadelphia, Philadelphia

Academy of Natural Sciences of Drexel University
Catalog #: PH00315519
G. A. Rex #s.n.
Microsphaera symphoricarpi Howe
United States, Pennsylvania, Philadelphia, Philadelphia

University of Illinois Herbarium
Catalog #: ILL00097946
GA Rex s.n.
Microsphaera symphoricarpi Howe
United States, Pennsylvania, Philadelphia, Philadelphia; Philadelphia

University of Wisconsin-Madison Herbarium
Catalog #: WIS-F-0086715
GA Rex s.n.
Microsphaera symphoricarpi Howe
United States, Pennsylvania, Philadelphia, Philadelphia

Chrysler Herbarium - Mycological Collection
Catalog #: CHRB-F-0011962
George A. Rex s.n.
Microsphaera symphoricarpi Howe
United States, Pennslyvania, Philadelphia;

USDA United States National Fungus Collections
Catalog #: BPI 558889
Rex George A. s.n.
Microsphaera symphoricarpi Howe
United States, Pennsylvania, Philadelphia

USDA United States National Fungus Collections
Catalog #: BPI 958197
Rex George A. s.n.
Microsphaera symphoricarpi Howe
United States, Pennsylvania, Philadelphia