LLOYD. 



PLATE 6. 



Stomata of Verbena ciliata taken at periods of maximum and minimum starch content. 



1. Stoma at sunrise; starch abundant. 



2. Stoma at about 9 a. m.; starch none. Flastids at minimum size. These two stomata were 



in the pieces figured in 3 and 4, respectively, at lower magnification. 



5. This is from stomata fixed by absolute alcohol, and photographed while in this medium. The 



oil drops may be seen, one in each cell. 



6. Stoma at 9 a. m., showing starch present, but in reduced amount, while in 7 the amount of 



starch is high. This was taken at 6 p. m. on the same day. 



