210 



SCIENTIFIC AND APPLIED PHARMACOGNOSY 



upper surface with numerous short stem-remnants or stem-scars, 

 under and side portions with numerous roots or root-scars; frac- 

 ture short, waxy; internally deep yellow, bark about 0.5 mm. in 

 thickness, wood radiate, about 1 mm. in thickness, pith light yellow; 

 odor distinct; taste bitter. 



FIG. 90. Transverse section of a part of the rhizome of hydrastis near the 

 cambium: P, parenchyma; S, sieve; C, cambium; T, tracheae; F, wood 

 fibers. 



Roots 4 to 7 cm. in length, 0.2 to 0.4 mm. in diameter; inter- 

 nally bright yellow, wood somewhat quadrangular. 

 Inner Structure. See Fig. 90. 



