Ohap. I. TWINING PLANTS. 29 



(Dicotyledons, eonfinued.) 



Bivea Hlicefolia (ConvolTulacete) moves against the sun; 

 made fovir revolutions in 9 hrs.; so that, on an average, each 

 was performed in 2 hrs. 15 m. 



Plumbago rosea (Plumbaginaceje) 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 

 3Tirs. 33 m. for its completion. 



Jasminum paiunflorum, Bentham ( Jasminaceffl), moves against 

 the sun. A circle was made in 7 hrs. 15 m., and a second rather 

 more quickly. 



Clerodendrum Tlwmsmii (Verbenaceas) follows the sun. 



E. u. 



April 12, 1st circle was made in . 5 45 (shoot very young) 

 „ 14, 2nd „ „ „ .3 30 



{(directly after the 

 plant was shaken 

 on being moved) 

 „ 19, 3rd circle „ „ .30 

 „ 20,4th „ „ „ .4 20 



Tecoma jasminoides (Bignoniacess) moves against the sun. 



a. v. 



March 17, 1st circle was made in . 6 30 



„ 19,2nd „ „ „ .70 



,, 22, 3rd „ „ „ .8 30 (very cold day) 



„ 24, 4th „ „ „ .6 45 



■fhunhergia alata (Acanthacese) moves against sun. 



H. H. 



April 14, 1st circle was made in . 3 20 

 „ 18, 2nd „ „ „ .2 50 

 „ 18, 3rd „ „ „ . 2 55 

 „ 18, 4th „ „ „ .3 55 (late in afternoon) 



