- A Manual of Poisonous Plants, Chiefly of Eastern North America, With Brief Notes on Economic and Medicinal Plants, and Numerous Illustrations
- Anatomical Characters of the Seeds of Leguminosae, Chiefly Genera of Gray's Manual
- Weeds of the Farm and Garden
- The Grasses of Iowa, Volume 2
- The Grasses Of Iowa, Volume 1, Part 2