I l6 UNIVERSITY OF MISSOURI STUDIES [264 



sheltered places and about streams and springs, 5700 (stream 

 in mesa fronting Flagstaff Hill) — 12000 ft. (Daniels, 24). St. 

 Vrain Canon, 7000 ft. (Coulter in Wabash College Herb.). 

 Montana to Colorado and Utah. 



153. ARENARIA L. Sandwort. 



398. A. Tweedyi Rydb. Tweedy's sandwort. 



Above timberline, Arapahoe Peak, 11 000- 12000 ft. (Dan- 

 iels, 1003). 



Wyoming to New Mexico and Arizona. 



399. A. Fendleri Gray. Fendler's sandwort. 



High mesas between Marshall and South Boulder Peaks, 

 thence throughout the mountain region, 5700-12000 ft. (Dan- 

 iels, 425). Also mountains between Sunshine and Ward, and 

 at Caribou (Rydberg). 



Wyoming to New Mexico and Arizona. 



399a. A. Fendleri diffusa Porter & Coulter. Diffuse Fend- 

 ler's sandwort. 



Plains and mesas about Boulder and Marshall, and in the 

 foothills and mountains, 5100-10000 ft. (Daniels, 423). 



Colorado. 



154. ALSmOPSIS Small. 



400. A. propinqua (Richardson) Rydb. [Arenaria propinqua 

 Richardson; A. verna aeqidcauUs A. Nels.]. Glandular 

 sandwort. 



Arapahoe Peak in dry tundras, 11000-13000 ft. (Daniels, 

 754). Also Eldora to Baltimore (Rydberg). 



Hudson Bay to British Columbia ; Colorado to Utah. 



401. A. obtusiloba Rydb. [Arenaria obtusa Torr.]. Obtuse- 

 leaved sandwort. 



Very common in dry tundras, forming often the main part of 

 the turf, Arapahoe Peak, 11000-13500 ft. (Daniels, 913). Also 

 at Caribou, loooo ft. (Rydberg). Redrock lake, loioo ft. 

 (Ramaley & Robbins). 



Alberta to British Columbia; New Mexico to Utah. 



