Am.  Jour.  Pharm.\ 
December,  1896.  J 
North  American  Conifer ce. 
643 
Maryland,  the  Virginias,  North  Carolina  and  Tennessee  to  Georgia 
and  Alabama. 
It  is  a  tree  of  large  size,  attaining  a  height  of  no  feet  and  a 
diameter  of  4  feet.    It  is  sometimes  found  in  low  ground,  where  the 
Fig.  52. — Small  part  of  cross-section  of  twig,  two  years  old,  of  Tsuga  Cana- 
densis, magnified  75  diameters.  P,  periderm  ;  c,  small  parenchyma  cells  of 
cortex  ;  cr,  cr' ',  crystal  cells  ;  st,  stone  cells  of  middle  bark  ;  b,  bast  layer  ;  ca, 
cambium  ;  xy,  xylem  ;  mr,  medullary  ray  containing  tannin. 
soil  is  deep  and  rich  ;  but  it  occurs  more  commonly  on  rocky  hill- 
or  mountain-sides,  especially  along  northern  exposures.  Its  wood 
is  of  low  specific  gravity,  brittle  and  neither  very  strong  nor  very 
durable,  but  it  is  much  used  for  lumber.    The  tree  is  beautiful  in 
