PLATE 33 



POROUS AND NON-STRIATED STONE CELLS 



1. Ceylon cinnamon (cinnamomum zeylanicum, Necs). 



2. Calumba root (Jateorhiza palmata, [Lam.] Micrs). 



3. Dogwood root bark (Cornus florida, L.). 



4. Cubeb (Piper cubeba, L., f.) 



5. Echinacea (Echinacea angustifolia, D.C.). 



