1G MR. DARWIN ON CLIMBING-PLANTS. 



(Dicotyledons, continued.) 



Thryallis brachystachya (Malpighiaccnc) 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. 



Jlibbertia dentata (Dilleniacea>), 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 hi 7h.; on the 20th, moved against 

 the sun one-third of circle, and then stood still ; on the 2Gth, 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 (Pittosporacea;) moves against the sun ; in greenhouse. 



hi m. 



h. m. 



April 4, 1st circle 4 25 fjday.) 

 „ 5, 2nd „ 8 (very cold 



April G, 3rd circle 6 25 



„ 7,4th „ 7 5 



Polygonum dumetorum (Polygonacere) . This case is taken from Dut rochet 

 (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 (Lcguminosa?), in greenhouse, moves against the sun. 



h. 



in. 



May 13, 1st circle 3 5 



„ 13, 2nd „ 3 20 



„ 16,3rd „ 2 5 



h. in. 



May 24, 4th circle 3 21 



„ 25, 5th „ 2 37 



„ 25, 6th „ 2 35 



PJiaseolus vulgaris (Leguminosa;), in greenhouse, moves against the sun. 



hi m. 



May, 1st circle 2 



„ 2nd „ 1 55 



„ 3rd „ 1 55 



Dipladenia urophylla (Apocynacea>) moves against the sun. 



h. in. 



April IS, 1st circle 8 



„ 19,2nd „ 916 



„ 30,3rd „ 9 40 



Dipladenia crassinoda moves against the sun. 



li. m. 



May 16, 1st circle 9 5 



July 20, 2nd „ 8 



n 21,3rd „ 8 5 



Ceropegia Oardnerii (Asclepiadacea:) moves against the sun. 



h. ni. 

 bhoot very young, 2 inches in length, 1st circle in 7 55 



Shoot still young 2nd „ 7 



Long shoot 3rd „ G 33 



Long shoot 4th „ 5 15 



Long shoot 5th „ 6 45 



Slephanolisjloribunda (Asclepiadacea) moves against the sun, and made a 

 circle in 6 h. 40 in., a second circle in about 9 hours. 



