136 MEMOIRS OF THE NEW YORK BOTANICAL GARDEN. 



ternal sieve tubes were larger than in the normal and with lighter 

 or thinner walls. The endodermis internal to the sieve cells just 

 mentioned was less heavily thickened than in the normal, and was 

 not to be separated from the pericycle bounded by it. 



•A 



■B 



C 



J^ D 



Fig. 93. Osmunda ci?inamomea. Transverse section of portion of etiolated stelar 

 region correspondent to that shownjin Fig. 92. Description as in Fig. 92. 



