The power of movement in plants. New York: D. Appleton & Co., 1881.
8vo. x, 592 pp. plus 10 pages With 196 wood-engraved figures in the text, and 10 pages publisher's advertisements. Original publisher's red cloth with flower-pattern endpapers. $500.00
First American edition, sole issue, published soon after the first edition of 6 November 1880. This was an extension of Darwin's work on climbing plants, and according to Freeman, it sold fewer copies than his other books. Darwin's investigation on the "sleep of plants" was of major significance. He found that plants need sufficient light during the day, and that darkness and radiation made them fold up.