MEMOIRS OF THE NEW YORK BOTANICAL GARDEN. 3 



444 ; 111. Fl. I : 13 ; Bot. Cal. 2 : 348] ; Polypodium fragile L. Sp. 



PI. 1091. 



The most common fern in Montana and the Park, growing among 

 rocks and reaching an altitude of 3000 m. 



Montana: Little Belt Mountain, near the pass, Aug. 10, 1895, 

 J^lodman, ij; Sweet Grass Caiion, Sept. 8, ly; Madison Co., Airs. 

 L. A. Fitch; Lower Sand Coulee, 1891, R. S. Williams, ij8. 



Yellowstone Park: Black Tail Deer Creek, 1884, Tweedy, 8 ; 

 1888, Dr. C/ias. Hall; 1883, Miss Mary Compton ; Yellowstone 

 Falls, 1873, C. C. Parry, J 02. 



Dryopteris Filix-Mas (L.) Schott, Gen. Fil. 1834 [O^ir Nat. Ferns, 



115; 111. Fl, i: i"]!^, Polypodiiim Filix-Mas L. Sp. PI. 1090; 



Aspiditini Filix-Mas Sw. Schrad. Journ. Bot. 2 : 38 [Ferns of N. 



A. I : 311 ; Man. R. M. 443.] 



This has been reported from Montana, but I have not seen any 

 specimens. 



* Dryopteris spinulosa dilatata (Hoffmann) Underwood, Our Na- 

 tive Ferns, 116 [111. Fl. i: 18] ; Polypodiuni dilatatum Hoffm. 

 Deutschl. Fl. 2 : 7 ; Aspidiuin spinnlosum dilatatwn Hook. Brit. 

 Fl. 444 [Ferns of N. A. 2 : 165]. 

 It differs from the typical D. spinulosa by the more numerous and 



larger scales of the stipe and the broader triangular fronds ; the 



scales generally have a darker center. In rich damp woods, ver}'^ 



rare. 



Montana: Missoula Co., Mrs. J. J. Kennedy. 



Polystichum Lonchitis CL.) Roth, Tent. Fl. Germ. 3: 71; Dryop- 

 teris Lonchitis Kuntze, Rev. Gen. PI. 813 [111. Fl. i : 14] ; 

 Polypodimn Lonchitis L. Sp. PL 1088 ; Aspidiuin Lonchitis Sw. ; 

 Schrad. Jour. Bot. 2 : 30 [Ferns of N. A. i : 161 ; Our Native 

 Ferns; Man. R. M. 444]. 



Among rocks, probably up to an altitude of 2000 m. ; rare. 

 Montana: Park Co., 1887, Tzueedy ; East Boulder, 1887, 2^2; 



Bozeman, 1886, Peter Koch, 1102; Mrs. P. Koch; Lake Terry, 



1892, R. S. Williams, gj2. 



Phegopteris Dryopteris (L.) Fee, Gen. Fil. 243 [Ferns of N. A. i : 

 157 ; Our Native Ferns, 109; Man. R. M. 443 ; 111. Fl. i : 19] ; 

 Polypodium Dryopteris L. Sp. PI. 1093. 

 In rocky woods, reaching an altitude of little over 1000 m. 



