340 



A TEXT-BOOK OF BOTANY. 



Fig. 195. Monocotyledonous stem structure. Transverse section of convallaria 

 rhizome: E, epidermis; H, hypodermis composed of collenchyma; C, cortex; EN, endo- 

 dermis; S. perihadromatic sieve; T, tracheae or vessels; P, p^^renchyma. The bundles are 

 of the collateral and concentric types. 



