Thryallis brachystachys (Malpighiaceae) moves against the sun: one shoot made a circle in 12 hrs., and another in 10 hrs. 30 m.; but the next day, which was much colder, the first shoot took 10 hrs. to perform only a semicircle.
Hibbertia dentata (Dilleniaceae), placed in the hothouse, followed the sun, and made (May 18th) a circle in 7 hrs. 20 m.; on the 19th, reversed its course, and moved against the sun, and made a circle in 7 hrs.; on the 20th, moved against the sun one-third of a circle, and then stood still; on the 26th, followed the sun for two-thirds of a circle, and then returned to its starting-point, taking for this double course 11 hrs. 46 m.
Sollya Drummondii (Pittosporaceae) moves against the sun kept in greenhouse.
H. M.
April 4, 1st circle was made in 4 25
5, 2nd 8 0 (very cold day)
6, 3rd 6 25
7, 4th 7 5
Polygonum dumetorum (Polygonaceae). This case is taken from Dutrochet (p. 299), as I observed, no allied plant: follows the sun. Three shoots, cut off a plant, and placed in water made circles in 3 hrs. 10 m., 5 hrs. 20 m., and 7 hrs. 15 m.
Wistaria Chinensis (Leguminosae), in greenhouse, moves against the sun.
H. M.
May 13, 1st circle was made in 3 5
13, 2nd 3 20
16, 3rd 2 5
24, 4th 3 21
25, 5th 2 37
25, 6th 2 35
Phaseolus vulgaris (Leguminosae), in greenhouse, moves against the sun.
H. M.
May, 1st circle was made in 2 0
2nd 1 55
3rd 1 55
Dipladenia urophylla (Apocynaceae) moves against the sun.
H. M.
April 18, 1st circle was made in 8 0
19, 2nd 9 15
30, 3rd 9 40
Dipladenia crassinoda moves against the sun.
H. M.
May 16, 1st circle was made in 9 5
July 20, 2nd 8 0
21, 3rd 8 5
Ceropegia Gardnerii (Asclepiadaceae) moves against the sun.
H. M.
Shoot very young, 2 inches }
in length } 1st circle was performed in 7 55
Shoot still young 2nd 7 0
Long shoot 3rd 6 33
Long shoot 4th 5 15
Long shoot 5th 6 45
Stephanotis floribunda (Asclepiadaceae) moves against the sun and made a circle in 6 hrs. 40 m., a second circle in about 9 hrs.
Hoya carnosa (Asclepiadaceae) made several circles in from 16 hrs. to 22 hrs. or 24 hrs.
Ipomaea purpurea (Convolvulaceae) moves against the sun. Plant placed in room with lateral light.
{Semicircle, from the light in
1st circle was made in 2 hrs. 42 m. { 1 hr. 14 m., to the light
{ 1 hr. 28 m.: difference 14 m.
{Semicircle, from the light in
2nd circle was made in 2 hrs. 47 m. { 1 hr. 17 m., to the light 1 hr.
{ 30 m.: difference 13 m.
Ipomaea jucunda (Convolvulaceae) moves against the sun, placed in my study, with windows facing the north-east. Weather hot.
{Semicircle, from the light in
1st circle was made in 5 hrs. 30 m. { 4 hrs. 30 m., to the light 1
hr.
{ 0 m.: difference 3 hrs. 30 m.
2nd circle was made in 5 hrs. {Semicircle, from the light in
20 m. (Late in afternoon: { 3 hrs. 50 m., to the light 1
hr.
circle completed at 6 hrs. 40 m. { 30 m.: difference 2 hrs. 20 m.
P.M.)