SUPPORTING TISSUES 



109 



PLATE 42. Stone Cells. 



1. Chionanthus bark. (Porous, striated.) 2. Ceylon Cinnamon bark. (Por- 

 ous, nonstriated.) 3. Xanthoxylum bark. (Porous, nonstriated.) 4. Tea leaf. 

 (Branched, porous.) 5. Pond Lily rhizome. (Branched, porous.) 6. Pepper fruit. 

 (Porous, nonstriated.) 7. Prunus bark. (Nonporous, nonstriated.) 8. Cascara 

 bark. (Porous, nonstriated.) 



