174 



MEMOIRS OF THE NEW YORK BOTANICAL GARDEN. 



few cm. before being placed in the dark chamber formed a small 

 pitchered cavity, and an extension of the flap to a width of 8 or 9 

 mm. The over-arching lip extended only 2 to 7 mm. beyond the 

 end of the cylindrical portion which would have formed the pitcher 

 in the normal. 



Leaves which developed from the bud after being placed in dark- 

 ness showed the normal size of cavity, but the lateral flap of the leaf 



Fig. 134. Epidermal structures of normal leaf of Sarracenia purpurea. A, epi- 

 dermal cell and hair from terminal flap. B, surface view and section of epidermis from 

 " attractive " area. C, epidermis from " conducting " area. Z), epidermal cells and 

 hair from " detentive " region. After drawing Wm. B. Stewart. 



was reduced to a wedge-shaped rudiment, and the arching lip was 

 scarcely apparent. In such instances glands were found over the 

 entire leaf and long, slender hairs were to be seen in the pitchered cav- 

 ity. The diameter of the cavity in the normal pitcher was six to eight 

 times that of the etiolated leaf. The etiolated leaf was twice as long 

 as the normal, and much of the elongation took place in the basal 



