102 Plants which cause Mechanical Injury [ch. vm 



in lambs and sheep when eaten in large quantities (48), and has caused 

 the death of many a Iamb. It would appear to be due entirely to the 

 formation of large liimps of the weed in the stomach, and subsequent 

 fermentation (Farmer and Stockbreeder, Mar. 16, 1908). 



According to Cornevin, Black Bindweed (P. Convolvulus L.) may 

 prove injurious, owing to the occurrence of the hard, trigonous, and 

 pointed " seeds " in cereal grains. Galtier published facts which show 

 that oats which contain too many of the " seeds " may, by prolonged 

 use, occasion a more or less seriotis enteritis, which is sometimes fatal, 

 particularly when the grain is fed to greedy horses which scarcely grind 

 their food (73). The fruits or "seeds" of Knot-weed {Polygonum 

 Aviculare L.) may similarly prove injurious, and probably the seeds 

 of other plants. 



