38 1 J FLORA OF BOULDER, COLORADO 233 



South Dakota to Wyoming; Oklahoma to Colorado. 



1046. T. exscapa (Richardson) Porter [T. sericca Hook.]. 

 Silky Townsendia. 



Common at Boulder (Cockerell). 



Saskatchewan to Montana; Texas to New Mexico. 



445. EUCEPHALUS Nutt. 



1047. ^- Engelmannii (Gray) Greene [Aster Engehnannii 

 Gray]. Engelmann's aster. 



In canons about Eldora, 8500-10000 ft. (Daniels, 841). 

 Montana to British Columbia ; Colorado to Washing- 

 ton. 



1048. E. glaucus Nutt. [Aster glaucus (Nutt.) T. & G.]. 

 Glaucous aster. 



Hills adjoining Boulder Cafion, and on the slopes of Green 

 Mountain, local, 6000-8000 ft. (Daniels, 569). Also moun- 

 tains between Sunshine and Ward (Rydberg). 



Wyoming to Colorado and Utah. 



446. ASTER L. Starwort. 



1049. A. Fnderwoodii Rydb. Underwood's aster. 



Caiions and mountain sides at Eldora, 8500-10000 ft. (Dan- 

 iels, 1025). Also Eldora to Baltimore (Rydberg). 

 Wyoming to Colorado. 



1050. A. Nelsonii Greene. Nelson's aster. 



Subalpine valley at Eldora, 8600-8700 ft. (Daniels, 861). 

 Wyoming to Color.\do. 



105 1. A. violaceus Greene. Violet aster. 

 Cafions at Eldora, 8600-8700 ft. (Daniels, 554). 



COLOrL\DO. 



1052. A. exiguus (Fern.) Rydb. [A. ciliatus Muhl.] Ciliate 

 aster. 



Common on the plains and foothills, 5100-7000 ft. (Dan- 

 iels, 999). Also in Sunset Cafion (Rydb.). 



Vermont to Washington ; Pennsylvania to Arizona and 

 Mexico. 



