The Movements and Habits of Climbing Plants. Чарльз ДарвинЧитать онлайн книгу.
Adhadota cydonæfolia (Acanthaceæ) follows the sun. A young shoot made a semicircle in 24 hrs.; subsequently it made a circle in between 40 hrs. and 48 hrs. Another shoot, however, made a circle in 26 hrs. 30 m.
Mikania scandens (Compositæ) moves against the sun.
| H. | M. | ||
| March 14, 1st circle was made in | 3 | 10 | |
| 15, 2nd | 3 | 0 | |
| 16, 3rd | 3 | 0 | |
| 17, 4th | 3 | 33 | |
| April 7, 5th | 2 | 50 | |
| 7, 6th | 2 | 40 | This circle was made after a copious watering with cold water at 47° Fahr. |
Combretum argenteum (Combretaceæ) moves against the sun. Kept in hothouse.
| H. | M. | ||
| Jan. 24, 1st circle was made in | 2 | 55 | Early in morning, when the temperature of the house had fallen a little. |
| 24, 2 circles each at an average of | 2 | 20 | |
| 25, 4th circle was made in | 2 | 25 |
Combretum purpureum revolves not quite so quickly as C. argenteum.
Loasa aurantiaca (Loasaceæ). Revolutions variable in their course: a plant which moved against the sun.
| H. | M. | |
| June 20, 1st circle was made in | 2 | 37 |
| 20, 2nd | 2 | 13 |
| 20, 3rd | 4 | 0 |
| 21, 4th | 2 | 35 |
| 22, 5th | 3 | 26 |
| 23, 6th | 3 | 5 |
Another plant which followed the sun in its revolutions.
| H. | M. | ||
| July 11, 1st circle was made in | 1 | 51 | Very hot day. |
| 11, 2nd | 1 | 46 | |
| 11, 3rd | 1 | 41 | |
| 11, 4th | 1 | 48 | |
| 12, 5th | 2 | 35 |
Scyphanthus elegans (Loasaceæ) follows the sun.
| H. | M. | |
| June 13, 1st circle was made in | 1 | 45 |
| 13, 2nd | 1 | 17 |
| 14, 3rd | 1 | 36 |
| 14, 4th | 1 | 59 |
| 14, 5th | 2 | 3 |
Siphomeris or Lecontea (unnamed sp.) (Cinchonaceæ) follows the sun.
| H. | M. | ||
| May 25, semicircle was made in | 10 | 27 | (shoot extremely young) |
| 26, 1st circle | 10 | 15 | (shoot still young) |
| 30, 2nd | 8 | 55 | |
| June 2, 3rd | 8 | 11 | |
| 6, 4th | 6 | 8 | |
| 8, 5th | 7 | 20 | Taken from the hothouse, and placed in a room in my house. |
| 9, 6th | 8 |