- Darwiniana: Essays and Reviews Pertaining to Darwinism
- The Elements of Botany for Beginners and for Schools
- Gray's school and field book of botany: Consisting of "Lessons in botany" and "Field, forest, and garden botany" bound in one volume
- 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
- In Memoriam, Asa Gray