130 DROSERA ROTUNDIFOLIA. [Chap. VII. 



twenty-eight outer tentacles inflected; after 5 hrs. 20 m. about a 

 third of the tentacles inllected ; after 8 hrs. much re-expanded. 



(7) After 20 ui. some inflection; after 2 hrs. a considerable 

 number of tentacles inllected; after 7 hrs. 45 m. b^^n to re- 

 expand. 



(8) After 38 m. twenty-eight tentacles inflected; after 3 hrs. 

 45 m. thirty-three inflected, with most of the submarginal tentacles 

 sub-inflected; continued so for two days, and then partially re- 

 expanded. 



(9) After 38 m. forty-two tentacles inflected; after 3 hrs. 12 m. 

 sixty-six inflected or sub-inflected; after hrs. 40 m. all but 

 twenty-four inflected or sub-inflected; after 9 hrs. 40 m. all but 

 seventeen inflected; after 24 hrs. all but four inflected or sub- 

 inflected, only a few being closely inflected; after 27 hrs. 40 m. the 

 blade inflected. The leaf remained in this state for two days, and 

 then began to re-expand. 



(10) After 38 m. twenty-one tentacles inflected; after 3 hrs. 

 12 m. forty-six tentacles inflected or sub-inflected; after 6 hrs. 

 40 m. all but seventeen inflected, though none closely; after 24 hrs. 

 every tentacle slightly cur\ed inwards; after 27 hrs. 40 m. blade 

 strongly inflected, and so continued for two days, and then the 

 tentacles and blade very slowly re-expanded. 



(11) This fine dark red and rather old leaf, though not very 

 large, bore an extraordinary number of tentacles (viz. 252), and be- 

 haved in an anomalous manner. After 6 hrs. 40 m. only the short 

 tentacles round the outer part of the disc were inflected, forming a 

 ring as so often occurs in from 8 to 24 hrs. with leaves both in 

 water and the weaker solutions. But after 9 hrs. 40 m. all the 

 outer tentacles except twenty-five were inflected, as was the blade 

 in a strongly marked manner. After 24 hrs. every tentacle except 

 one was closely inflected, and the blade was completely doubled 

 over. Thus the leaf remained for two days, when it began to re- 

 expand. I may add that the three latter leaves (Nos. 9, 10, and 

 11) were still somewhat inflected after three days. The tentacles 

 in but few of these eleven leaves became closely inflected within so 

 short a time as in the previous experiments with stronger solutions. 



We will now turn to the twenty corresponding leaves in water. 

 Nine had none of their outer tentacles inflected; nine others had 

 from one to three inflected; and these re-expanded after 8 hrs. 

 The remaining two leaves were moilerately afl^eoted ; one having 

 six tentacles inflected in 34 m. ; the other, twenty-three inflected in 

 2 hrs. 12 m. ; and both thus remained for 24 hrs. None of these 

 leaves had their blades inflected. So that the contrast between 

 the twenty leaves in water and the twenty in the solution was very 

 great, both within the first hour and after from 8 to 12 hrs. had 

 elapsed. 



Of the leaves in the solution, the glands on leaf No. 1, which 

 in 2 hrs. had all its tentacles except eight inflected, were counted 

 and found to be 202. Subtracting the eight, each gland could have 

 received onlv the rnrinon o' grain (.0000411 mg.) of the phos- 

 phate. Leaf No. 9 had 213 tentacles, all of which, with the ex- 



