ECHINACEA 



697 



B 



FIG. 307. Echinacea: A, cross-section of outer layers of root, showing cork (c) 

 and hypoderrais (h). B, cross-section of cortex showing parenchyma (p), 

 sphere-crystals of inulin (i), stone or sclerotic cells (s) and oleo-resin reser- 

 voirs or canals (o). C, cross-section of portion of fibrovascular bundle 

 showing leptome or sieve (I), cambium (m), trachea or vessels (t), oleo-resin 

 canals (o), stone cells (s), parenchyma (p) and inulin crystals (i). D, cross- 

 section near endodermis showing endodermal cells with suberized radial 

 walls or Casparyan spots (c), endodermal resin canal (o), and parenchyma 

 (p). E, cross -section of underground stem or rhizome showing a group of 

 bast fibres (6), leptome or sieve (I), and parenchyma (p). F, a sclerotic or 

 stone cell. G, parenchyma with sphero-crystals of inulin adhering to the 

 walls. H, longitudinal section showing various forms of trachea or vessels; 

 d, double spiral; a, annular; r, with simple pores; p, adjoining parenchyma. 



