The field notes and diary document Bohumil Shimek's work in Iowa, April 7 - June 4, 1920. Pages are tabbed. Entries are dated and describe plants seen enroute (usually along railroads); terrain; and weather. Sometimes lists of plants are headed with type of terrain (bluffs, bottomland, woods),and include lists of trees. Some notes are crossed out. Locations includes the vicinity of Homestead, City Park, Muscatine county, Colesburg, Osterdock, Wilton, Cedar Rapids, and Mason City, Iowa.
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