138 Rydberg : Rocky Mountain flora 



twice as long ; neither corniculate ; achenes greenish, ribbed, 

 tuberculate above, but otherwise smooth. 



Probably related to T. mignstifoUum Greene, but that is de- 

 scribed as having much narrower leaves and erect outer bracts. 

 It differs from T. montanum in the longer, narrower and spreading 

 bracts and the less lobed leaves. 



Colorado: Tennessee Pass, 1902, Osterhout 26^ j (type); 

 Seven Lakes, 1896, E. A. Bcssey. 



