H.W. Ravenel and M.C. Cooke [1-800, plu extras]

Cornell University, Plant Pathology Herbarium
Catalog #: Rav.,F.Amer.0625
s.n.
Microsphaera extensa Cooke & Peck
United States, South Carolina, Aiken, Aiken;

University of Nebraska State Museum, C.E. Bessey Herbarium
Catalog #: NEB00059768
H. W. Ravenel s.n.
Microsphaera extensa Cooke & Peck
United States, South Carolina, Aiken, Aiken;

Academy of Natural Sciences of Drexel University
Catalog #: PH00302533
H. W. Ravenel #s.n.
Microsphaera alni var. extensa (Cooke & Peck) E.S. Salmon
United States, South Carolina, Aiken, Aiken

Iowa State University, Ada Hayden Herbarium
Catalog #: ISC-F-0087716
H.W. Ravenel #s.n.
Microsphaera extensa Cooke & Peck
USA, South Carolina, Aiken;