399] FLORA OF BOULDER, COLORADO 25 1 



Redrock lake, ioioo ft. (Ramaley & Robbins). Middle Boul- 

 der Canon (Porter & Coulter in Wabash College Herb.). 

 Also from Eldora to Baltimore, and at Boulder (Rydberg). 

 Wyoming and Idaho to Colorado. 



1 168. S. atratus Greene [S. lugens foliosus Gray]. Leafy 

 groundsel. 



Arapahoe Trail just below timberline, Arapahoe Peak, thence 

 to Eldora, 8600-10500 ft. (Daniels, 947). Also at Ward; be- 

 tween Sunshine and Ward; and Eldora to Baltimore (Ryd- 

 berg). 



Colorado. 



1 169. S. Purshianus Nutt. Pursh's groundsel. 

 Redrock lake 10100 ft. (Ramaley & Robbins). 

 Saskatchewan to British Columbia; Texas to Utah. 



1 170. S. Harbourii Rydb. Harbour's groundsel. 

 Mountains south of Ward, the type locality, and between 



Sunshine and Ward (Rydberg). 

 Colorado. 



1 171. S. Plattensis Nutt. Platte ragwort. 



Common on the plains and mesas, 5100-6000 ft. (Daniels, 



36). 



Ontario to South Dakota ; Missouri and Texas to Colo- 

 rado. 



1 172. S. salicinus Rydb. Willow ragwort. 

 Foothills about Boulder, 6000-7000 ft. (Daniels, 1031). 

 Colorado. 



1 173. S. Nelsonii Rydb. [S. rosulatus Rydb.] . Nelson's rag- 

 wort. 



Exceedingly abundant throughout, and occurring in a maze 

 of forms so confluent that any segregation seems impossi- 

 ble, 5100-11000 ft. (Daniels, 210). Also at Caribou; and be- 

 tween Sunshine and Ward (Rydberg). 



Colorado. 



1 174. S. Fendleri Gray. Fendler's ragwort. 



