Hickory and Walnut Information
Place the cursor over the county of interest on the map or
on the name of the county in the alphabetical list on the right.
Scientific names preceded by an asterisk [*] indicate county records verified ONLY by a literature reference. All other county records have been verified by a voucher specimen.
Adams
Allamakee
Appanoose
Audubon
Benton
Black
Hawk
Boone
Bremer
Buchanan
Buena
Vista
Butler
Calhoun
Carroll
Cass
Cedar
Cerro
Gordo
Cherokee
Chickasaw
Clarke
Clay
Clayton
Clinton
Crawford
Davis
Decatur
Delaware
Des
Moines
Dickinson
Dubuque
Emmet
Fayette
Floyd
Franklin
Fremont
Greene
Grundy
Guthrie
Hamilton
Hancock
Hardin
Harrison
Henry
Howard
Humboldt
Ida
Iowa
Jackson
Jasper
Johnson
Jones
Keokuk
Kossuth
Lee
Linn
Louisa
Lucas
Lyon
Madison
Mahaska
Marion
Marshall
Mills
Mitchell
Monona
Monroe
Montgomery
Muscatine
O'Brien
Osceola
Page
Palo Alto
Plymouth
Polk
Pottawattamie
Poweshiek
Ringgold
Sac
Scott
Shelby
Sioux
Story
Tama
Taylor
Union
Van Buren
Wapello
Warren
Washington
Wayne
Webster
Winnebago
Winneshiek
Woodbury
Worth
Wright
"There was a young lady named Bright
Whose speed was far faster than light;
She set out one day,
In a relative way
And returned on the previous night."
-- A. H. Reginald Buller