104 



MONTANA AGRICULTURAL COLLEGE SCIENCE STUDIES. 



*Troximon heterophyllum, Greene. Dry hill pastures back of 

 Plains, June 6, 1902. Apparently introduced by stock from the 

 Pacific Coast. 



*Xanthium spinosum, L. Well established as a weed at a 

 sheep camp east of Victor, Bitter Root Valley, R. Parkhurst, Sept. 

 ?5, 1900. Probably brought in by sheep from the Pacific Coast. 



