- Darwiniana: Essays and Reviews Pertaining to Darwinism
- Gray's New Manual Of Botany (7th Ed.--illustrated): A Handbook Of The Flowering Plants And Ferns Of The Central And Northeastern United States And Adjacent Canada
- Gray's school and field book of botany: Consisting of "Lessons in botany" and "Field, forest, and garden botany" bound in one volume
- Plates Prepared Between the Years 1849 and 1859, to Accompany a Report on the Forest Trees of North America
- Field, Forest, and Garden Botany