WEEDS OF MONTANA, 



41. 'CONVOLVULUS ARVENSIS, L. Wild Morning-glory. 



A European perennial vine similar to the cultivated morning- 

 glory, but with small white flowers ; occasionally established in 



Fig. 8. Cnicus lanceolatus, Willd. Leaf and head 

 natural size. 



gardens and waste places; quite as difficult to exterminate as the 

 Canada thistle and should be treated like it. Noted at Manhat- 

 tan, Helena, Missoula, Flathead Lake, Kalispell, Bozeman and 



Crow Agency 



