144 



MEMOIRS OF THE NEW YORK BOTANICAl. GARDEN. 



was seen here, or in any other part 

 of the leaf. The leaves becran to 

 perish within a fortnight after 

 maturity, and the rootstock died 

 also. 



Peltandra Virginica (L.) Kunth. 



Corms which showed signs of 

 activity in April were brought into 

 the dark chamber. A month later 

 the petioles had reached a height 

 of 25 to 30 cm. and the lamina 

 were unrolled but variously in- 

 clined to the vertical. The laminae 

 reached a length of 14 to 16 cm. 

 and a width of 4 to 6 cm. or about 

 half the maximum dimensions. 



The petioles were more slen- 

 der than the normal. The lower 

 surfaces of the leaves showed a 

 large number of open stomata 

 which remained open when exam- 

 ined in water, the guard cells be- 

 ing filled with starch. This sub- 

 stance was also abundant in the re- 

 gion contiguous to the nerves. The 

 structure of the leaves was fairly 

 approximate to that of the normal. 

 The upper surfaces presented 

 a number of stomata, but like 

 the normal were not so numerous 

 as on the lower. But little differ- 

 ence between the structure of the 

 etiolated and normal petioles could 

 be found, except perhaps in the 

 size of the parenchymatous cells, 

 which were smaller. Similar re- 



FiG. 101. Peltandra Virginica. Etio- 

 lated culture. 



