Manual of the Grasses of the United States Volume 1

Manual of the Grasses of the United States Volume 2

Field Guide to the Grasses, Sedges, and Rushes of the United States

Agnes Chase's First Book of Grasses: The Structure of Grasses Explained for Beginners

How to Identify Grasses and Grasslike Plants: Sedges and Rushes

Grasses: An Identification Guide (Sponsored by the Roger Tory Peterson Institute)

Plant Identification Terminology: An Illustrated Glossary

Newcomb's Wildflower Guide

The Shrub Identification Book: The Visual Method for the Practical Identification of Shrubs, Including Woody Vines and Ground Covers

Botany in a Day: The Patterns Method of Plant Identification

Common Weeds of the United States