PLATE 90 



Ruellia Root {Ruellia ciliosa, Pursh.). 



1. Epidermis with root hair. 2. Parenchyma cells with dark contents. 

 3. Sclerid. 4. Parenchyma without dark cell contents. 5. Endodermis. 

 6. Bast fibers and phloem. 7. Cambium. 8. Xylem. 10. Pith. 



