Thomson: Lich. Wiscon. Exs.
John Walter Thomson, Jr. [1 - 96 [? 108 Uppsala]]

Arizona State University Lichen Herbarium
Catalog #: 527539
J.W. Thomson s.n. 22 May 1946
Caloplaca holocarpa (Hoffm. ex Ach.) M. Wade
USA, Wisconsin, Lincoln, NE corner of county

University of Michigan Herbarium
Catalog #: 67648
J.W. Thomson, Jr. #22-May-46 22 May 1946
Caloplaca ahtii Søchting
United States, Wisconsin, Lincoln, Locality placeholder for Catalog Number 67648

University of Wisconsin - Madison
Catalog #: WIS-L-0111611
John W. Thomson #s.n. 22 May 1946
Caloplaca ahtii Søchting
United States, Wisconsin, Lincoln, NE corner of Lincoln County