IO4 UNIVERSITY OF MISSOURI STUDIES [252 



Order 19. POLYGONALES. 

 Family 36. POLYGONACEAE Lindl. Knotweed family. 

 124. ERIOGONHM Michx. WOOL-JOINT. 



323. E. alatum Torr. WINGED WOOL-JOINT. 



Common on the plains, mesas, foothills, and open moun- 

 tainsides, 5100-10000 ft. (Daniels, 170). 



NEBRASKA to WYOMING; TEXAS to ARIZONA. 



324. E. vegetius (T. & G.) A. Nels. [E. flavum vegetius T. 

 & G. ; E. Jamesii flavescens S. Wats. ; E. Bakeri Greene] . 

 BAKER'S WOOL-JOINT. 



Mountains between Sunshine and Ward, and at Meadow 

 Park, 9000-10000 ft. (Rydberg). 

 WYOMING to UTAH; NEW MEXICO to ARIZONA. 



325. E. flavum Nutt. [E. crassifolium Dougl.]. YELLOW 

 WOOL-JOINT. 



Common in open places throughout, 5100-12000 ft. (Dan- 

 iels, 368). 

 SASKATCHEWAN to ALBERTA; NEBRASKA to COLORADO. 



326. E. umbellatmn Torr. UMBELLATE WOOL-JOINT. 



Very abundant in open places throughout, 5100-12000 ft. 

 (Daniels, 55). 

 WYOMING to IDAHO; COLORADO to UTAH. 



327. E. subalpinum Greene. SUBALPINE WOOL-JOINT. 

 Along the Arapahoe Trail from Eldora to Arapahoe Peak 



and ascending to the timberline, but not above it, 8600- 

 uooo ft. (Daniels, 950). 

 ALBERTA to BRITISH COLUMBIA ; COLORADO to NEVADA. 



328. E. effusum Nutt. EFFUSE WOOL- JOINT. 



Plains and mesas between Marshall and South Boulder 

 Peaks, and along the railroad between Boulder and Marshall, 

 5400-6000 ft. (Daniels, 439). 



NEBRASKA to MONTANA and COLORADO. 



