476 POWDERED VEGETABLE DEUGS 



173. (Fig. 168.) SALIX. Salix. 



Moderately fine. 



Willow-bark, E. Weidenrinde, G. Ecorce de saule, Fr. 



The bark of Salix alba L., and other species and varieties of Salix, 

 Salicacese. 



Light pinkish brown. 



Odorless. 



Very astringent, bitter. 



Outer bark of cork cells with brown contents. Inner bark par- 

 enchyma with aggregate crystals of calcium oxalate. Numerous 

 typical bast fibers with abundant prismatic crystal-bearing fibers; 

 abundant medullary ray tissue. Some parenchyma cells with deep 

 brown resin. 



