MEMOIRS OF THE NEW YORK BOTANICAL GARDEN. 



179 



jection i to 2 mm. in length, and generally two gland-like structures 

 were to be seen on the upper edge of the lateral flap. Other rudi- 

 mentary glands were to be found down along the edge of this lateral ex- 

 tension. The utricular cavity was present and extended to a depth of 

 3 to 5 mm. It was lined with small cells rich in protoplasm which were 

 wholly undifferentiated. The epidermis of the outer surface of the 

 leaf was composed of cells with four walls in surface view, and were 

 also rich in protoplasm. Honey glands were present. The epider- 

 mal glands, as well as the stomata, were fairly normal. No trichomes 

 were present. The pitchered cavity also lacked the hairs and glands 

 of the normal. The leaves endured existence for three months after 

 nearly full size had been reached. (Fig. 137-) 



When etiolated leaves were placed in light the lateral flap under- 

 went some extension but no great differentiation of the utricular 



formations ensued. 



Saururus cernuus L. 



Rhizomes placed in dark chamber in May, 1901, soon developed 

 stems with a height of 40 to 54 cm., being composed of 9 or 10 inter- 

 nodes each 2 to II cm. long and showing a diameter at base of stem 



I. II. 



Fig. 139. Saururus cernuus. Partial transverse sections of etiolated and normal 

 stems. I. Etiolated. II. Normal. A, epidermis. B, collenchjma. C, cortex. 



of 1.6 cm. and at apex of .6 m. The petioles attained a length of 

 5 cm. in some instances, but the sheathing bases did not keep pace 



