2 MEMOIRS OF THE NEW YORK BOTANICAL GARDEN. 



caused by the hot springs and geysers, at an aUitude of 2000- 

 2500 m. 



Montana: Gallatin Co., Mrs. Peter Koch. 



Yellowstone Park : 1S84, Tzucedy,6; 1885,7^7; Lower Fire 

 Hole Basin, 1872, J. M. Coulter; Lone Star Geyser Basin, August 

 7, 1897, Rydherg & Besscy. 



Botrychium Virginianum (L.) Sw. Schrad. Journ. Bot. 2: iii 

 [Ferns of N. A. 253 ; Our Nat. Ferns, 132 ; Man. R. M., 438 ; 

 111. Fl. i: 4; Bot. Cal. 2: 332]. 

 In rich woods, up to an altitude of perhaps 1500 m. 

 Montana: Tiger Butte, 1886, 7?. S. Williams, ^ 26. 



POLYPODIACEAE. 



Woodsia Oregana D. C. Eaton, Can. Nat. 2 : 90 [Ferns of N. A. 

 2: 185 ; Our Nat. Ferns, 120; Man. R. M. 444: 111. Fl. i : 11 ; 

 Bot. Cal. 2: 348]. 



In shaded places among rocks, at an altitude of 1-3000 m. 

 Montana: Spanish Basin, July 9, 1896, Flodman, 18. 

 Yellowstone Park: Obsidian Canon, 1885, Tzveedy, /pj. 



Woodsia scopulina D. C. Eaton, Can. Nat. 2 : 90 [Ferns of N. A. 



2: 193 ; Our Nat. Ferns, 120; Man. R. M. 444; 111. Fl. i : ii ; 



Bot. Cal. 2: 348]. 



In crevices of rocks, at an altitude of 1-3000 m. 



Montana: West Boulder, 1887, Tzveedy, go. 



Yellowstone Park : Obsidian Cliff, 1888, Dr. Chas. H. Hall; 

 iS8^, Tzaeedy, ypp ; 188;^, Miss 3f a /y Compton; 1873, C. C. Parry, 

 joj ; Upper Falls, Adajjis (Hayden Survey). 



* Woodsia obtusa (Spreng.) Torr. Cat. PI. in Geol. Rep. N. Y. 



195 [Ferns of N. A. 2 : 189; Our Nat. Ferns, 121 ; 111. Fl. i :ii] ; 



Polypodimn ohtusum Spreng. Anleit. 92. 



Taller than the other species ; frond 15—35 ^'^' l*^"g '■> indusium 

 cleft into broad jagged lobes. The species has never been reported 

 from any place so far northwest. It is evidently a rare plant in 

 the Rocky Mountain region. 



Montana: Lower Sand Coulee, 1891, R. S. Williams, j2y. 



Cystopteris fragilis (L.) Bernh. Schrad. Neues Journ. Bot. i : part 

 2, 27 [Ferns of N. A. 2 : 49 ; Our Nat. Ferjis, 118 ; Man. R. M. 



