6 DROSERA ROTUNDIFOLIA. Chap. 1. 



part, which alone is capable of movement, consists of a prolon- 

 gation of the leaf; the spiral vessels being extended from this 

 to the uppermost part. We shall hereafter see that the ter- 

 minal tentacles of the divided leaves of Eoridula are still in 

 an intermediate condition. 

 The glands, with the exception of those borne by the extreme 



Fig. 3. 



{Drosera rotundifolia.) 



lA>ngitudlnal section of a gland ; greatly magnilied. From Dr. Warming. 



marginal tentacles, are oval, and of nearly uniform size, viz. 

 nlxjut 5^*0 of an inch in length. Their structure is remarkable, 

 and their functions complex, for they secrete, absorb, and are 

 artcd on by various stimulants. They consist of an outer layer 

 of siiijill iK)lyg()nal cells, containing purj)le granular matter or 

 lluid, and ^\ith the walls thicker than those of the pedicels. 



