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- CLIMBING PLANTS - 4/27 -


light, in 1 hr. 33 m.; in travelling to the light, in 1 hr. 13 m.; difference of rate, 20 m.

Akebia quinata (Lardizabalaceae), placed in hothouse, moves against the sun.

H. M. March 17, 1st circle was made in 4 0 (shoot young) 18, 2nd 1 40 18, 3rd 1 30 19, 4th 1 45

Stauntonia latifolia (Lardizabalaceae), placed in hothouse, moves against the sun.

H. M. March 28, 1st circle was made in 3 30 29, 2nd 3 45

Sphaerostemma marmoratum (Schizandraceae) follows the sun.

H. M. August 5th, 1st circle was made in about 24 0 5th, 2nd circle was made in 18 30

Stephania rotunda (Menispermaceae) moves against the sun

H. M. May 27, 1st circle was made in 5 5 30, 2nd 7 6 June 2, 3rd 5 15 3, 4th 6 28

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.)

We have here a remarkable instance of the power of light in retarding and hastening the revolving movement. (See ERRATA.)

Convolvulus sepium (large-flowered cultivated var.) moves against the sun. Two circles, were made each in 1 hr. 42 m.: difference in semicircle from and to the light 14 m.

Rivea tiliaefolia (Convolvulaceae) moves against the sun, made four revolutions in 9 hrs.; so that, on an average, each was performed in 2 hrs. 15 m.

Plumbago rosea (Plumbaginaceae) follows the sun. The shoot did not 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.

H. M. April 14, 1st circle was made in 3 20 18, 2nd 2 50 18, 3rd 2 55 18, 4th 3 55 (late in afternoon)

Adhadota cydonaefolia (Acanthaceae) 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 (Compositae) 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 water-


CLIMBING PLANTS - 4/27

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