PLATE 94 



POWDERED RUELLIA CILIOSA, Pursh. 



I. Short, broad cystoliths from the rhizome, i'. Long cystoliths from the 

 root. 2 and 2'. Long, narrow, white-walled bast fibres. 3. Tracheal tissue 

 from the xylem of the stem. 4. Root parenchyma. 5. Tracheal tissue from 

 the xylem of the root. 6. Cortical parenchyma cells from the rhizome with 

 short, broad cystoliths. 7 and 7'. Long, thick-walled sclerids from the root. 

 8. Short, broad sclerids from the stem. 9. Pitted pith parenchyma from the 

 stem with intercellular space. 10. Parenchyma of the root with sclerid and 

 cystolith, longitudinal view. 



