MECHANICALLY INJURIOUS PLANTS 



28s 



plants cause considerable annoyance to livestock, the effective 

 plant parts frequently entering into the flesh of the animals and 

 causing inflammation of varying degrees of seriousness. Me- 

 chanical injuries caused by plants on range and pasture are in 

 evidence mostly in the fall of the year, about the time of seed 



Fig. 108. — death CUP (Amanita phalloides). 



maturity. Occasionally, also, mechanical injury occurs from 

 the feeding of hay which contains troublesome seed heads or other 

 parts of the plant that lodge in the eyes, tongue, throat, and hide 

 of foraging animals and cause pain, loss in weight, and sometimes 

 death. 



The most serious mechanical injuries brought about by vege- 

 tation on range and pasture are caused by grasses. Among these, 

 species embraced in the following genera are the most injurious: 

 Bromegrass (Bromus); barley and squirreltail grasses (Hordeum 



