I4S MEMOIRS OF THE NEW YORK BOTANICAL GARDEN. 



Hillsides and mountain sides, in damp places, at an altitude of 2500- 

 3000 m. 



Montana: Long Bald}^ Little Belt Mts., 1896, jFIodinan, 446; 

 Sweet Grass Caiion,^^/; Spanish Basin, July i, 1897, Rydbcrg & 

 Bessey, 40J4; Yogo, 1888, 7?. S. Williams^ ^.gj. 



Yellowstone Park : Yellowstone Lake, Aug. 12, 1897, Rxdhcrg- 

 & Bessey^ 4-037 j East De Lacy's Creek, Aug. 10, 403^ and 40J6 ; 

 Swan Lake, 1885, Tzuccdy, j6j ; Mud Springs, i^"]!. Hay den. 

 Arenaria subcongesta (Wats.) Rydb. Bull. Torr. Bot. Club, 24 : 244 ; 



Arenaria Fendlcri var. stibcongestaV^ais. Bot. King's Exp. 5 : 40 ; 



A. congesta var. subcongesta Wats. Bot. Cal. i : 69 [Syn. Fl. i' : 



241 ; Man. R. M. 35 ; Bot. Cal. i: 69]. 



Common on hillsides, mountains and in dryer valleys, at an alti- 

 tude of 2000-3000 m. 



Montana: Spanish Basin, iSg6, Rlodnian, 4J 4 ?ir\d 4j6 ; Little 

 Belt Pass, 433; Spanish Basin, June 28, 1897, Rydberg & Bessey, 

 40^j ; Bridger Mts., June 14, 40J4; Park Co., 1889, Tweedy, 1887, 

 48; Silver Bow Co., Mrs. Helen Dohnan; Madison Co., 1888, 

 Tzceedy, 141 ; Belt Mts., 1891, R. S. Williams, 41 ; West Gallatin, 

 1883, Scribner, I2b.^ 



Yellowstone Park : 1884,7^. Tweedy, 2S6; 1885, 7'^5 ^ 1883, 

 Miss Mary Compton; Hot Sulphur Springs, 1871, Hay den. 



* Arenaria subcongesta lithophila. 



More delicate ; cyme few-flowered ; leaves shorter and more seta- 

 ceous. 



This bears the same relation to A. subcongesta as the var. jiardi- 

 folia does to A. capillaris, and has been mistaken for that variety. 



It grows in crevices of rocks and in shallow dry soil on the moun- 

 tain tops, at an altitude of about 3000 m. 



Montana: Spanish Peaks, 1896, Flodnian, 437; Elk Mts., 434; 

 Little Belt Mts., 438; Bridger Mts., June 11, 1897, Rydberg & Bes- 

 sey, 4033; Melrose, 1895, Rydberg, 2642; Grasshopper Creek,. 

 1888, Tzueedy, 142; Lake Plateau, 1897, P. Koch, 32. 



Idaho : Mt. Chauvet, July 27, 1897, Rydberg & Bessey, 4036. 

 Arenaria capillaris Poir. ; Lam. Enc. 6: 380 [Syn. Fl. i^ : 240]. 



Distinguished from the variety in being larger and glabrous and 

 having straight leaves. 



Montana: McDonald's Peak, 1883, Canby, 48; Bitter Root 

 Valley, 1880, Watson. 



