The Movements and Habits of Climbing Plants by Charles Darwin
page 29 of 178 (16%)
page 29 of 178 (16%)
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begin to revolve until nearly a yard in height; it then made a fine
circle in 10 hrs. 45 m. During the next few days it continued to move, but irregularly. On August 15th the shoot followed, during a period of 10 hrs. 40 m., a long and deeply zigzag course and then made a broad ellipse. The figure apparently represented three ellipses, each of which averaged 3 hrs. 38 m. for its completion. Jasminum pauciflorum, Bentham (Jasminaceae), moves against the sun. A circle was made in 7 hrs. 15 m., and a second rather more quickly. Clerodendrum Thomsonii (Verbenaceae) follows the sun. H. M. April 12, 1st circle was made in 5 45 (shoot very young) 14, 2nd 3 30 {(directly after the 18, a semicircle 5 0 { plant was shaken { on being moved) 19, 3rd circle 3 0 20, 4th 4 20 Tecoma jasminoides (Bignoniaceae) moves against the sun. H. M. March 17, 1st circle was made in 6 30 19, 2nd 7 0 22, 3rd 8 30 (very cold day) 24, 4th 6 45 Thunbergia alata (Acanthaceae) moves against sun. |
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