PLATE 104 



Powdered White Pine Bark {Pinus strobus, L.) 



1. Epidermis. 2. Parenchyma cells. 3. Parenchyma with starch. 4. 

 Medullary rays. 5. Solitary crystals. 6. Solitary crystals and tannin. 7, 8 

 and 10. Resin masses. 9. Starch. 



