ACORUS CALAMUS 

 e 



II 



Fig. 8. — Transverse section "of central part of the root of Acorus calamus, 

 c, Cortex; e, endodermis; p, pericycle; s, primary xylem or wood-bundles, 

 with small spiral vessels of the protoxylem externally; v, phloem portion of vascular 

 bundles; m, pith. (JProm Sayre after Sirashurger.) 



Fig. 9. — Cross-section of a typical dicotyledon stem from the pith to the epidermis 

 and comprising one vascular bundle. (From Hamaker.) 



