LLOYD 



PLATE 10. 



m %iT § 







\\ 



9 &J(b 



@V (i It- a 



v 





.r w 



'©/, 



Explanation op Plate. 



Stomata of Verbena ciliata under red light. 



1. 6 a. m. Experiment 220, April 30. 3. 5 a. m. Experiment 220, May 3. 



2. 11 a. m. 



4. 11 a. m. 



