CATALoatE OF oanaduu plants. 276 



This species especially favours rocky, wooded ravines and hillsides, 

 occurring abundantly from the Maritime Provinces to the Lake of the 

 "Woods, thence, but very sparingly, to the Eocky Mountains. Gene- 

 rally distributed throughout Nova Scotia. {Ball.) Eather common 

 in New Brunswick. {Fowler.') Not rare in Pi-ince Edward Island. (Bain.) 

 Common in Quebec. (Provancher, McCord, Sheppard, St. Cyr, &c.) Very 

 common in Ontario. {Lawson, Macoun, Billings, Burgess, &c,) Abundant 

 in the Muskoka and Parry Sound districts of Ontario, and along the 

 _ Dawson Eoad, Man. {Burgess.) Split Eock Portage, on the Nepigon 

 Eiver, Ont., and in Peace Eiver Pass, Eocky Mountains, Lat. 56° 

 {Macoun.) The Saskatchewan. {Drummond.) 



(3010.) A. spinulosum, Swartz, Schrad. Journ., ii., 38; Syn. Fil., 

 54. Hook., Fl. Bor.-Am., ii., 261. Provancher, PL Can., 719. 

 Macoun & Burgess, Trans. Eoy. Soc. Can., ii., sect, iv., 206. 



Nephrodium spinulosum, Desv., Ann. Linn., vi., 261. Hook. & Baker, 



Syn. Fil., 275. 

 Lastrea spinulosa, Presl, Tent. Pterid., 76. Lawson, Fern Fl. Can., 242. 



A partially evergreen fern finding its favorite home in thick, 

 especially damp, woods. It is frequent in the wooded districts of all 

 our provinces and ranges northward to Alaska. 



Var. intermedium, I>. C. Baton, Gray, Manual, Ed. v., 665. 

 Macoun & Burgess, Trans. Eoy. Soc. Can., ii., sect, iv., 20'7. 



Aspidium intermedium, Willd. J, Sp. PI., v., 262. Pursh, Fl. Am. Sept., 



ii., 663. 

 Lastrea intermedia, Presl, Tent. Pterid., 77. 

 Aspidium Americanum, Davenport, Am. Nat, xii., 714; Catal., 29. 



This form, which prefers drier woods, has the same range as the 

 type, but is most abundant in Eastern and Central Ontario. 



Var. dilatatum, Hook., Brit. Fl. ed. I., 444. Macoun & Burgess, 

 Trans. Eoy. Soc. Can., ii., sect, iv., 207. 



Aspidium dilatatum, Swartz, Syn. Fil., 420. 



Lastrea dilatata, Presl., Tent. Pterid., 77. Lawson, Can. Nat., i., 281. 



Lastrea spinulosa, Presl, var. dilatata, Lawson, Fern Fl. Can., 240. 



Like the type, it extends from the Atlantic, through the Eocky 

 Mountains, to the Pacific, prevailing most extensively in the Eastern 

 Provinces and British Columbia, where, in places, it forms almost the 

 whole undergrowth. Not very common in Ontario except about Lake 

 Superior. 



