The key to the vascular flora of the northeastern United States and southeastern CanadaFloyd Swink · First published 1990Open the Tome
Woody plants of the Morton ArboretumWalter Eickhorst, Ray Schulenberg, Floyd Swink · First published 1972Open the Tome
A guide to the wild flowering plants of the Chicago regionFloyd Swink · First published 1953Open the Tome