MEMOIRS OF THE NEW YORK BOTANICAL GARDEN. 151 



Moehringia lateriflora (L.) Fenzl, Verbr. Alsin. table, p. i8 [111. 



Fl. 2: 35] ; Arcnaria laierijiora L. Sp. PI. 423 [Syn. Fl. i^ : 



238; Man. R. M. -^^e^. 



Among bushes and on hillsides, up to an altitude of 2500 m. 



Montana: Bridger Mts., June 10, 1897, Rydherg & Bessey, 

 4.038; Lewis and Clarke Co., Mrs. Miith ; Helena, 1891, Kelsey ; 

 Jefferson River, 1883, Scribner, 12: Ross' Hole, 1880, Watson. 



Yellowstone Park: Slough Creek, 1885, Tweedy, ySg. 



*Tissa rubra perennans (Kindb.) Greene, Pittonia, 2: 229: Lcj[>i- 



gonuin riihyuiii fcrennans Kindb. Monog. 40 ; Spcrgularia 



fcrcnnans Robinson ; Gray, Svn. Fl. i^ : 250. 



A somewhat fleshy plant, with narrowly linear leaves, large 

 lanceolate scarious silvery stipules and small reddish flowers. In 

 gravelh' soil. 



Montana: Granite, 1S92, F. D. Kelsey. 



ILLECEBRACEAE. 



Paronychia sessiliflora Xutt. Gen. i : 160 [Man. R. M. 303 ; 111. 



Fl. 2: 39]. 



On dry hills, up to an altitude of 2000 m. 



Montana: Little Rocky Mts., 1889, Dr. V. Hazard ; Madison 

 River, 1886, F. Tweedy, loSi ; Great Falls, 1891, F. S. Williams, 

 282; Beaver Head Co., 1888, Fweedy, 140: Fort Logan, 1882, 

 Canby ; 1883, Scribner, 221. 



NYMPHAEACEAE. 



Nymphaea polysepala (Engelm.) Greene, Bull. Torr. Bot. Club, 15: 



84 ; Xnphar polysepaluni Engelm. Trans. Acad. St. Louis, 2 : 282 



[Man. R. M. 13; Syn. Fl. i^ : 77: Bot. Cal. i: 17]. 



Growing in ponds and still pools in the rivers, up to an altitude of 

 a little over 2000 m. 



Montana: Spanish Basin, June 28, 1897, Fydberg d- Bessey, 

 40jg; Forks of the Madison, July 27, 4038; Rimini, 1887, F. D. 

 Kelsey. 



Yellowstone Park : Headwaters of Gibbon River and Yellow- 

 stone Lake, 1884, F. Tzceedy, 28. 

 Nymphaea advena Ait. Hort. Kew 2 : 226 [111. Fl. 2 : 42] ; Xiiphar 



advena Xk. Hort. Kew. Ed. 2, 3: 295 [Syn. Fl. i^ : 77; Man. 



R. M. 12]. 



