MEMOIRS OF THE NEW YORK BOTANICAL GARDEN. 



49 



would be thrust out. After a time the leaves and flowers would 

 become entirely freed from the bud. The leaflets remained tightly 

 folded together and were of a rich yellow color. The spathe re- 

 mained tightly wrapped around the spadix, was smaller than the 

 normal and also of a pale yellow color. The scape did not attain a 

 length comparative to that of the petioles. Normally the attenuated 

 tip of the spadix is thrust out above the leaflets, but in these etiolated 

 examples it remained much shorter. The etiolated spadices were 

 about normal length. The stamens and pistils did not reach normal 

 stature, and attempts at pollination met with no result as to seed 

 formation. 



Fig. io. Arisaema Dracontium. A, epidermis of normal scape. B, epidermis of 

 etiolated scape. C, epidermis from lower surface of normal leaflet. Z>, epidermis 

 from lower surface of etiolated leaflet. X 190 



The scapes and scape were more slender than the normal. 

 The altered dimensions of the epidermal cells did not correspond 

 to these changes, however. Measurements of a number gave an 

 average length of 38 for the normal and 32 for the etiolated epidermal 

 cells of the scape. The width of normal cells was 10 and of the 



