104 



THE PHYSIOLOGY OF STOMATA. 



8 



6 



9 night 12 



FIG. 33. Daily periodicity in movements of stomata of Fouquieria splendens. Extreme sizes 

 plotted in thin lines; means in heavy line. July 10, 1904. 



TABLE 51. Stomatal movement, Fouquieria splendens, July 10, 1904. (Fig. 33.) 



TABLE 52. Size of stomatal openings under normal conditions, material growing on Uni- 

 versity oj Arizona campus, July 27-28, 1906. Well-watered plants of Fouquieria splen- 

 dens, in irrigated (Tourney) garden. (Figs. 34 to 37, inclusive.) 



