25 books
Anatomical Characters of the Seeds of Leguminosae, Chiefly Genera of Gray's Manual (Classic Reprint)
Notes on the Flora, Especially the Forest Flora, of the Bitter Root Mountains (Classic Reprint)
The Grasses of Iowa: The Descriptive and Geographical Study of the Grasses of Iowa (Classic Reprint)
Proceedings of the Iowa Park and Forestry Association; First Annual Meeting, Des Moines, 1901
Notes on the Grasses and Forage Plants of Iowa, Nebraska, and Colorado, Volumes 1-10...