THE  AMERICAN 
JOURNAL  OF  PHARMACY 
FEBRUARY,  1896. 
A  CONTRIBUTION  TO  THE  KNOWLEDGE  OF  SOME  — 
NORTH  AMERICAN  CONIFERS. 
By  Kdson  S.  Bastin  and  Henry  Trimble. 
{Continued  from  page  jp.) 
GENERAL  CHARACTERS  OF  THE  PINASTER  GROUP. 
The  pines  of  this  group  differ  from  those  of  the  Strobus  group 
already  studied,  not  only  in  the  fact  that  their  wood  is  darker, 
harder  and  more  resinous,  but  in  the  structure  of  their  cones  and 
leaves.  The  scales  of  the  cones  are  usually  thicker  and  more  woody, 
the  apophysis,  particularly,  is  considerably  thickened  and  the  umbo 
is  dorsal  instead  of  being  terminal,  and,  instead  of  being  unarmed,  is 
usually  armed  with  a  spine,  more  or  less  strongly  developed.  The 
scaly  sheaths  at  the  base  of  the  leaves  are  much  more  persistent, 
and  the  leaves  are  most  commonly  in  twos  or  threes,  though  in  a 
few  species  they  are  in  fives,  the  same  as  in  the  white  pines. 
PINUS  RIGIDA,  MILLER. 
PITCH  PINE. 
GENERAL  CHARACTERS. 
This  tree  is  native  to  the  eastern  part  of  our  continent,  ranging 
in  habitat  from  New  Brunswick  to  the  mountains  of  northern 
Georgia,  and  from  the  coast  westward  to  eastern  Kentucky  and  Ohio. 
It  frequents  rocky  or  thin,  sandy  soil,  and  under  favorable  conditions 
attains  a  height  of  80  or  90  feet.  Its  outer  bark  is  dark  and  rough, 
and  its  wood  quite  hard  and  resinous. 
Its  leaves  are  in  threes,  or  more  rarely  in  twos,  from  short  sheaths, 
and  are  from  3  to  5  inches  in  length,  dark  green  in  color  and  rather 
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