THE POLYPETAL/E 



87 



park. This was done in the early morning at a season 

 of great heat. All experienced intense heat on the left 

 arm and wrist. Inflammation followed, accompanied by 

 sores which prevented tliem from returning to AA'ork 



Fig. 53.— Cow Parsnip or Hogweed {Heradeum Spkondyllum) 



a, Flower. &, Fruit, c, Fruit cut across. 



for nearly three iveeks. In collecting the plants they 

 h^^d thrown them over their left arm, with the result 

 tliat the volatile oil, which during the later parts of 

 tHe day would have volatilized, had condensed on tlieir 

 ^i^niR and produced the effects stated. 



