146 MEMOIRS OF THE NEW YORK BOTANICAL GARDEN. 



Cerastium longipedunculatum ]\Iulil. Cat. 46 [Hi. Fl. 2 : 26] ; Ce- 



rastiuin nutans Raf. Prec. Decouv. 36 [Syn. Fl. i' : 230 ; Man. R. 



M. 33; Bot. Cal. i: 66]. 



In lowlands, up to an altitude of 2200 m. 



Montana: Elk Mts., 1896, Flodman, 4.22: Forks of the Madi- 

 son, July 26, 1897, Rydberg & Bcssey^ 4013 ; Spanish Basin, Juh' i, 

 /J-016: West Gallatin, 1883, Scribncr^ i2e. 



* Cerastium brachypodum Robinson, Proc. Am. Acad. 29 : 277 [Syn. 



Fl. i': 229; 111. Fl. 2: 26]. 



Like the preceding, but smaller and with the pedicels shorter and 

 not hooked. Rare. 



Montana: Great Falls, 1891, 7?. S. Williams, 2y8. 



* Cerastium elongatum Pursh, Fl. Am. Sept. 321. 



This species has been lost for over eighty years. When the larger 

 part of the Lewis collection was discovered a few years ago in the 

 possession of the American Pliilosophical Society at Philadelphia, the 

 type of this species was found therein : this collection is now 

 deposited with the Acadeni}- of Natural Sciences, w^here I have had 

 the privilege of seeing it. The plant differs from C. arvcnse in 

 the dense glandular-pubescence of the stem and especially of the in- 

 florescence and calyx, and in the elongated raceme or panicle-like 

 cyme with its nearly erect branches. It grows on hillsides, at an 

 altitude of about 2000 m. The following specimens belong here : 



Montana : Spanish Basin, 1897, Rxdhcrg d'- Bcsscy, 401 y : Little 

 Belt Mts., 1896, Flodman, 426%. 



Cerastium arvense L. Sp. PI. 438 [Syn. Fl. i' : 230: Man. R. M. 



33; 111. Fl. 2: 27; Bot. Cal. i: 67]. 



Common in the valleys, up to an altitude of 2500 m. 



Montana : Spanish Basin, 1896, Flodman^ 4-4- Little Belt Mts., 

 42J ; Spanish Basin, June 28 and 30, 1897, Rydbcrgd' Bcsscy, 401S ; 

 Bridger Mts., June 11-18, 4021 and 4022 ; Melrose, 1895, Rydbcrg; 

 263 J ; Bozeman, 26jg; Great Falls, 1891, 7?. S. Williams, J2; 

 Basin, 1892, F. D. Kclscy ; Missoula Co., Mrs. J. J. Kennedy; 

 Bozeman, 1892, W. T. Shazv : Custer Co., 1892, Mrs. Light; 

 Jefferson City, 1883, Scribncr, 12: Grasshopper Valley, 1880, 

 Watson. 



Yellowstone Park: 1884, F. Tweedy, 2pj : 1882, Afiss Jl/ary 

 ComJ>ton; Yellowstone Lake, 187 1, Hay den. 



