212 CIBCUJIXUTATION OF STEMS. Chap. IV 



(19.) Laium auratum (Fam. LdiacesB).— The circumnutatiou 

 Fig. 83. 



6p.mlL 



S'a.m.1^ 



Milium aumtun : circumniitation of a stem in darkness, traced on a horizontal 

 glass, from 8 A.M. on March 14th to 8.35 A.M. on 1 6th. But it should 

 be noted that our observations were interrupted between 6 P.M. on the 

 14-th and 12.15 P.M. on 15th, and the movements during this interval 

 of 18 h. 15 m. are represented by a long brokuu line. Diagram reduced 

 to half original scale. 



of the stem of a plant 2i inches in height is represented in the 

 above figure (Fig. t-3). 



Fig. 48. 



Cppn-ux niferiiifulirts ; circumnutatinn of stem, illummated from above, 

 traced on horizontal glass, from 9.45 a.m. March 9th to 9 P.M. on 10th 

 The stem grew so i-apidly whilst being observed, that it was not possible 

 to estimate how much its movements were magnified in the tracmg. 



(20.) Cyperus alternifoUns (Tam. Cyperacete.) — A gla.ss 



