I04 UNIVERSITY OF MISSOURI STUDIES [252 



Order 19, POLYGONALES. 

 Family 36. POLYGONACEAE Lindl. Knotweed family. 

 124. ERIOGONTIM 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. ; £. 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. umbellatum 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- 

 iiooo 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. 



