344 
ILLUSTRATIONS. 
Plate X. 
MONOCOTYLEDONOUS STEM STRUCTURE. 
Fig. 63. — Transverse section of convallaria (rhizome): (E), epi- 
dermis; (H), hypodermis composed of collenchyma ; 
(C), cortex; ( EN), endodermis ; (S), sieve ; (T), ducts ; 
( P), pith. 
