399] FLORA OF BOULDER, COLORADO 251 



Redrock lake, 10100 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 1 68. S. atratus Greene [S. lug ens 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. 



1169. S. Purshianus Nutt. PURSH'S GROUNDSEL. 

 Redrock lake 10100 ft. (Ramaley & Robbins). 

 SASKATCHEWAN to BRITISH COLUMBIA; TEXAS to UTAH. 



1170. S. Harbourii Rydb. HARBOUR'S GROUNDSEL. 

 Mountains south of Ward, the type locality, and between 



Sunshine and Ward (Rydberg). 

 COLORADO. 



1171. 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. 



1172. S. salicinus Rydb. WILLOW RAGWORT. 

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

 COLORADO. 



1173. 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. 



1174. S. Fendleri Gray. FENDLER'S RAGWORT. 



