234 UNIVERSITY OF MISSOURI STUDIES [382 



1053. A. crassulus Rydb. THICKISH. ASTER. 



Sunset Canon; common on the plains, 5100-8000 ft. (Dan- 

 iels, 720). 



NORTH DAKOTA to IDAHO; COLORADO to CALIFORNIA. (?) 



1054. A. polycephalus Rydb. MANY-HEADED ASTER. 

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

 iels, 1000). 



ALBERTA to NEBRASKA ; TEXAS to ARIZONA. 



1055. A. commutatus Gray [A. incanopilosus (Lindl.) Shel- 

 don]. WHITE PRAIRIE ASTER. 



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

 iels, 717). 

 MINNESOTA to WYOMING; KANSAS to NEVADA. 



1056. A. laevis L. SMOOTH ASTER. 



Canons and wooded slopes on the foothills, 5800-8000 ft. 

 (Daniels, 685). 

 ONTARIO to SASKATCHEWAN; LOUISIANA to NEW MEXICO. 



1057. A. Porteri Gray. PORTER'S ASTER. 



Abundant throughout, 5100-10000 ft. (Daniels, 697). Also 

 mountains between Sunshine and Ward (Rydberg). Very va- 

 riable; an extreme form, only i-i^dm., high, was col- 

 lected on bare ridges at Glacier lake. 



COLORADO. 



1058. A laetevirens Greene. LIGHT-GREEN-LEAVED ASTER. 

 Canons at Eldora, 8600-8700 ft. (Daniels, 858). 

 COLORADO and WYOMING. 



1059. A. coerulescens DC. [A. salicifolius coerulescens (DC.) 

 Gray]. CAERULEAN ASTER. 



Swales in the plains, 5100-6000 ft. (Daniels, 995). 

 WYOMING to TEXAS. 



1060. A. Osterhoutii Rydb. OSTERHOUT'S ASTER. 



About lakes and swales and along ditches in the plains, 

 5100-6000 ft. (Daniels, 779). 

 COLORADO. 



