MEMOIRS OF THE NEW YORK BOTANICAL GARDEN. 



99 



ing. The cortex was composed of the customary thin-walled cells, 

 which with the pith contained some starch, and was furnished with 

 intercellular spaces. The epidermal cells were slightly thickened 

 as also one or two layers of hypodermal tissue. Some widely open 

 stomata were present. 



Fig. 54. Corims alternifolia. Base of young tree with spreading normal branches 

 and upright etiolated branches. 



In the older internodes the pith had attained twice the original 

 diameter, the wood ring had increased b)'' continuous and uniform 

 external additions, and some thickening had ensued in the bast fibers. 

 The number of these elements had not increased, and the walls were 

 pushed inwardly in some instances as if the cells had collapsed. No 

 indications of collapse were to be seen in the outer layers of cortex, 

 or in any way comparable to that seen in Castanea^ a fact which is 

 correlated with the shorter period of duration of Cormis. The 

 formation of a distinct phellogen in the epidermal region had 



