ASptiiPhia9™'  }      Rhus  Glab™  and  Rhus  Typhina. 
403 
4-celled  stalks  and  nearly  globular  or  elliptical,  multicellular  heads, 
the  contents  being  of  a  pink  or  purplish-red  color.  The  non- 
glandular  hairs  are  very  long,  frequently  over  2  mm.  in  length,  more 
Fig.  2. 
Fruiting  branch  with  leaves  of  Rhus  typhina.    Reproduced  from  Sai gent's  Silva  of  North 
America. 
or  less  undulate  in  outline  and  have  relatively  thicker  walls.  The 
color  of  the  cell  sap  in  the  non-glandular  hairs  varies  with  the  age 
of  the  stems  from  which  the  sections  were  made,  they  are  frequently 
