(Dicotyledons, continued.)
Thryallis brachystachya (Malpighiaceæ) moves against the sun: one shoot made a circle in 12 h., and another in 10 h. 30 m.; but the next day, which was much colder, the first shoot in my study took 10 h. to perform only a semicircle.
Hibbertia dentata (Dilleniaceæ), placed in the hothouse, followed the sun, and made (May 18th) a circle in 7 h. 20 m.; on the 19th, reversed its course and moved against the sun, and made a circle in 7 h.; on the 20th, moved against the sun one-third of circle, and then stood still; on the 26th, followed the sun for two-thirds of circle, and then returned to its starting-point, taking for this double course 11 h. 46 m.
Sollya Drummondii (Pittosporaceæ) moves against the sun; in greenhouse.
| h. | m. | h. | m. | ||||||
| April 4, | 1st circle | 4 | 25 | April 19, | 3rd circle | 6 | 25 | ||
| April„ 5, | 2nd circle„ | 8 | 0 | (very cold day). | April„ 7, | 4th circle„ | 7 | 5 |
Polygonum dumetorum (Polygonaceæ) . This case is taken from Dutrochet (p. 299), as I observed no allied plant; follows the sun. Three shoots cut off and placed in water made circles in 3 h. 10 m., 5 h. 20 m., and 7 h. 15 m.
Wistaria Chinensis (Leguminosæ), in greenhouse, moves against the sun.
| h. | m. | h. | m. | ||||
| May 13, | 1st circle . . . . . . | 3 | 5 | May 24, | 4th circle . . . . . . | 3 | 21 |
| May„ 13, | 2nd circle„ . . . . . . | 3 | 20 | May„ 25, | 5th circle„ . . . . . . | 2 | 37 |
| May„ 16, | 3rd circle„ . . . . . . | 2 | 5 | May„ 25, | 6th circle„ . . . . . . | 2 | 35 |
Phaseolus vulgaris (Leguminosæ), in greenhouse, moves against the sun.
| h. | m. | ||
| May, | 1st circle . . . . . . . . . . . . . . . | 2 | 0 |
| May,„ | 2nd circle„ . . . . . . . . . . . . . . . | 1 | 55 |
| May,„ | 3rd circle„ . . . . . . . . . . . . . . . | 1 | 55 |
Dipladenia urophylla (Apocynaceæ) moves against the sun.
| h. | m. | ||
| April 18, | 1st circle . . . . . . . . . . . . . . . | 8 | 0 |
| April„ 19, | 2nd circle„ . . . . . . . . . . . . . . . | 9 | 15 |
| April„ 30, | 3rd circle„ . . . . . . . . . . . . . . . | 9 | 40 |
Dipladenia crassinoda moves against the sun.
| h. | m. | ||
| May 16, | 1st circle . . . . . . . . . . . . . . . | 9 | 5 |
| July 20, | 2nd circle„ . . . . . . . . . . . . . . . | 8 | 0 |
| July„ 21, | 3rd circle„ . . . . . . . . . . . . . . . | 8 | 5 |
Ceropegia Gardnerii (Asclepiadaceæ) moves against the sun.
| h. | m. | ||
| Shoot very young, 2 inches in length. | 1st circle in | 7 | 55 |
| Shoot still young | 2nd circle in„ | 7 | 0 |
| Long shoot | 3rd circle in„ | 6 | 33 |
| Long shoot | 4th circle in„ | 5 | 15 |
| Long shoot | 5th circle in„ | 6 | 45 |
Slephanotis floribunda (Asclepiadaceæ) moves against the sun, and made a circle in 6 h. 40 in., a second circle in about 9 hours.
