LLOYD 



PLATE 14 



o.oo 



o .01 



O.O2 

 rrt m 



EXPLANATION OP PLATE. 

 Stomata of Verbena ciliata in air deprived of carbon dioxid. 



1. 6 h 30 m a. na. Experiment 211. 4. 7 k 30 p. m. Experiment 207. 



2. 11 a. m. 4a. A plastid from figure 4. 



3. 11 a. m. " 207. 5. 6 a. m. April 30 and May 3. Stoma with 

 3o A plastid from figure 3 one dead guard-cell, this containing an 



abundance of starch. 



