448 



BOTANY AND PHARMACOGNOSY. 



Fig. 193. Transverse section of Honduras sarsaparilla in which the middle portion 

 of the cortex is omitted; e. epidermis with root hairs; s, hypodermis; A, outer portion of 

 cortex; B, inner portion of cortex; k, endodermis; g, trachea; b, sieve cells; m, parenchy- 

 ma at the center of the root. The thick-walled cells around the tracheae and sieve cells are 

 sclerenchyma fibers. After Luerssen. 



