270 GEOLOGICAL SURVEY OF CANADA. 



Polypodium htxagonopterum, Michx., Fl. Bor.-Am., ii., 271. Pursh, Fl. 



Am. Sept., ii., 659. Lawson, Can. Nat., i., 268. Hook. & Baker, 



Syn. Fil., 309. 

 Polypodium Phegopteris, var. majus, Hook., Fl. Bor.-Am., ii., 258. 



This species is found in rich, open woods, and, in south-western 

 Ontario, seems to take the place of P. polypodioides, from which species 

 it is sometimes difficult to separate it. Quebec, Que. (Sheppard.) 

 Nun's Island, Montreal, Que. k (Parsons.) Bare in Miriwin's Woods, 

 near Prescott, Ont. (Billings.') Eocky woods, near Campbellford, 

 Northumberland Co., and in thickets at Port Stanley, Elgin Co., Ont. 

 (Macoun.) Rich woods near the Waterworks Reservoir, Toronto, and 

 at London, St. Thomas, and Windsor, Ont. (Burgess.) Cbippewa, 

 Ont. (Maclagan.) Parry Sound, Ont. (Logie.) 



(3000.) P. Dryopteris, Fe, Gen. Fil., 243. Macoun & Burgess, 

 Trans. Roy. Soc. Can., ii., sect, iv., 198. 



Polypodium Dryopteris, Linn., Sp. PI., 1555. Swartz, Syn. Fil., 41. Hook., 

 Fl. Bor.-Am., ii., 259. Lawson, Can. Nat., i., 269. Provancher, 

 Fl. Can., 713. 



Polypodium calcareum, Pursh, Fl. Am. Sept., ii., 659 (not of Smith and 

 Willdenow.) 



Nephrodium, Dryopteris, Michx., Fl. Bor.-Am., ii., 270. 



Common in rocky woodlands from Nova Scotia to British Columbia, 

 and extending northward to the Arctic Circle. To be met with in 

 most localities in Nova Scotia. (Ball.) Common in New Brunswick. 

 (Fowler.) Common on Prince Edward Island, and along Lakes Mani- 

 toba and Winnipegoosis, and in the Riding, Duck, and Porcupine 

 mountains, Man., also in the Rocky Mountains, British Columbia and 

 Vancouver Island. (Macoun.) Abundant in Quebec. (Maclagan, 

 D' Urban, Provancher, St. Cyr, &c.) Common in rocky parts of On- 

 tario. (Billings, Macoun, Burgess, &c.) Along the C. P. Ry. north of 

 Lakes Huron and Superior. (Fletcher.) At intervals from Lake 

 Winnipeg to within fifty miles of Hudson Bay, and on Clearwater 

 River, N. W. Ter. (J. M. Macoun.) Echimamish River to Oxford 

 House, Keewatin. (E. Bell.) Rocky Mountains and Great Bear Lake, 

 Lat. 66. (Hook., in Fl. Bor.-Am.) British Columbia. (Dawson.) 

 Victoria and Port Simpson, B.C. (Anderson.) 



Var. Robertianum, Dav., Suppl. Cat. Dav. Herb., 47. 



P. calcarea, Fe"e, Gen. Fil., 243- Macoun & Burgess, Trans. Hoy. Soc. 

 Can., ii., sect, iv., 199. 



Polypodium Robertianum, Hoff. ; Moore, Nat. Pr. Brit. Ferns, t. vi. Law- 

 son, Can. Nat., i., 270. 



Polypodium Dryopteris, var. calcareum, Gr., Man., Ed. 2., 590. 



