124 



MEMOIRS OF THE NEAV YORK BOTANICAL GARDEN. 



which continues to elongate during the greater part of its existence in 

 the open. The opposite leaves on the etiolated stems remained in a 

 rudimentary form and were upright, being closely appressed against 

 the stem. The leaves do not attain a length greater than 5 mm. and 

 a width of 1.5 mm., dying away on the lower internodes as the stems 



Fig. 80. LYsiiiiac/iia ierrcsfris. Partial transverse section of bulbil. A, air 

 spaces ; B, protoxjlem ; E, protophloem ; F, endoderm ; Z>, ducts. 



progress, much after the same manner as in the normal specimen,, 

 so that only three to five pairs were to be seen at one time. The 

 number of internodes in the etiolated and normal stems are prac- 

 tically equal. The diameter of the etiolated stem was barely half 

 that of the normal. The epidermis of the stems as well as of the 

 leaves showed numbers of stalked glands of apparently normal struc- 



