POISONOUS AND INJURIOUS WEEDS 109 



purging or death to the animals fed thereon. Under some con- 

 ditions prussic acid is developed by the plant and this would 



FIG. 32. AUTUMN CROCUS FIG. 33. PURGING FLAX (Linwn catharticum). 



(Colchicum autumnale). 



be quite sufficient to cause the results recorded ; therefore 

 it is wiser to regard with suspicion pastures or meadows con- 

 taining this flax. 



Ragwort (Senecio jacobcea). The harmful nature of this 



