Astragalus Tetrapterus, a New Poisonous Plant. 



that further observation will show a wider range. It grows in 

 scattering patches, never in such large quantities as is the case with 

 some of the recognized loco plants. It is found in bloom early in 

 June and generally dries up later in the summer. 



Pig. 2. — Astragalus tetrapterus, showing the form of the pods. 



EFFECT OF THE PLANT. 



The symptoms as seen in the range have already been described. 

 There has not been experimental work enough to make a very com- 

 plete picture of the condition produced by corral feeding. Appar- 

 ently the symptoms are not especially characteristic. There is 

 staggering, the weakness being more pronounced in the hind legs. 

 In the case of a steer there were mild spasms, with violent expira- 



