WEEDS <>\ THE FARM. 



B 



Black or Spear Thistle [Oarduus !<>neeolatu$ Linn.). 



a. Under side of a leaf, showing venation (three-fifths natural size). b. Pappus, natural size). 



■<.'. Individual bristle of the pappus (magnified). i>. Fruit (magnified). 



