212 UNIVERSITY OF MISSOURI STUDIES [360 



(Daniels, 213). Also from Eldora to Baltimore (Rydberg). 

 Colorado. 



922. P. alpinus Torr. [P. glaber alpinus Gray ; P. riparius A. 

 Nels.]. Alpine beard-tongue. 



Common on the foothills and mountains, 6000-10000 ft. 

 (Daniels, 214). Also at Ward (Rydberg). 

 Colorado to Wyoming. 



923. P. unilateralis Rydb. One-sided beard-tongue. 

 Common throughout in open places, 5300-8600 ft. (Daniels, 



7). Also from Eldora to Baltimore (Rydberg). 

 Wyoming to New Mexico. 



924. P. secundiflorus Benth. Sharp-leaved beard-tongue. 

 Common throughout in open situations, 5100-8600 ft. (Dan- 

 iels, 8). 



Wyoming to New Mexico. 



925. P. glaucus Graham. Glaucous beard-tongue. 

 Mountains south of Ward (Rydberg). 

 Wyoming to Utah ; Colorado to Arizona. 



925a. P. glaucus stenosepalus Gray. Narrow-sepalled beard- 

 tongue. 



Arapahoe Peak at timberline, iiooo ft. (Daniels, 936). Also 

 Eldora to Baltimore (Rydberg). Redrock lake loioo ft. 

 (Ramaley and Robbins). 



Range of the type, but strictly alpine. 



926. P. gracilis Nutt. Slender beard-tongue. 



Common on the plains, mesas, and lower foothills, 5100- 

 8000 ft. (Daniels. 22). 



Manitoba to Saskatchewan ; Texas to Colorado. 



927. P, humilis Nutt. Low beard-tongue. 



Common throughout in open places, 5100-9200 (Ward) ft. 

 (Daniels, 177). Also Eldora to Baltimore (Rydberg). 

 Montana and Alberta to Colorado and Nevada. 



928. P. Rydbergii A. Nels. [P. erosus Rydb.]. Rvdherg's 

 beard-tongue. 



