152 MEMOIRS OF THE NEW YORK BOTANICAL GARDEN. 



This is much rarer in the region than the preceding : I have seen 

 only one specimen that could be referred to it. 



Montana: Columbia Falls, 1892, 7?. S. WiUiams, S6g. 



CERATOPHYLLACEAE. 

 Ceratophyllum demersum L. Sp. PI. 992 [111. Fl. 2 : 46 ; Man. R. 

 M. 328: Bot. Cal. 2: 78]. 



In running water, up to an altitude of 2500 m. 

 Yellowstone Park: Broad Creek, 1885, Tivccdy, ^oj. 



RANUNCULACEAE. 

 Caltha leptosepala DC. Syst. i : 310 [Syn. Fl. i' : 40: Man. R. M. 



6; Bot. Cal. i: 9]. 



In swamps, at altitudes of 2000-3000 m. 



Montana: Grizzly Creek, 1887, Tzuccdy, 18S: Deer Lodge Co., 

 Mrs. Jennie Moore; Granite, 1892, F. D. Kchcy ; Head of Still- 

 water, 1897, P. Koch, y6. 



Yellowstone Park: 1888, Dr. Chas. H. Hall; 18S5, Tzvecdy, 

 gii : 1892, Brandco-ce; Upper Falls, 187 1, Haydcu. 



Trollius albiflorus (Gray) : Troll Ins laxus alhijiorus Gray, Am. 



Journ. Sci. II. 33: 24^ [Man. R. M. 9]. 



This Rocky Mountain plant, as far as I can ascertain, has always 

 white flowers, and broader sepals and broader lobes to the leaves than 

 T. laxus. Although 'these characters seem unimportant, I am fully 

 of the opinion that T. albiflorus is distinct from its Eastern relative. 

 The pure white and broader sepals are not confined to the low plants 

 near the snow banks, but are also found on those growing in swamp}^ 

 places in the valleys. It occurs at an altitude of 2000-3500 m. 



Montana : Deer Lodge, 1889, F. IV. Trafhagcn ; Old Hollow- 

 top, Pony Mountains, July 7, 1897, Rydhcrg & Bcsscy, 4060; 

 Spanish Peaks, 1895, Flodman, 4^0; Park Co., 1887, Tweedy, 181 ; 

 Silver Bow Co., Mrs. Jennie Moore; Belt Park, 1886, F. S. Wil- 

 liams, 487; Lake Plateau, 1897, P. Koch, 43; Belt Mountains, 

 1883, Scribner, J. 



Yellowstone Park: 1888, Dr. Chas. If. Hall: East De 

 Lacy's Creek, Aug. 10, 1896, Rydbcrg d- Bcsscy, 4061; 1885, 

 Tivcedy, 8gj : 1883, Miss Mary Conipton: iSg6, J. F. Kemp. 



*Coptis occidentalis (Nutt. ) Torr. ik Gray, Fl. N. A. i : 28 [Syn. 

 Fl. i^: 41 ; Bot. Cal. 2 : 427] ; Chrysocoptis occidentalis Nutt. 

 Journ. Acad. Phil. 7: 8. 



