CANADIAN FILICINE.E. 201 



Lastrea Noveboracensis, Presl, Lawson, Can. Nat., I, 284. 



Polystichum Noveboracense, Watt, Can. Nat., IV, 363. 



Polypodium Noveboracense, L. 



Nephrodium Noveboracense, Desv. 



Nephrodium thelypterioides, Mx., Fl. Bor.-Am., II, 26*7. 



Dryopteris Noveboracensis, Gr. 



A light green, very delicate fern, withering at the slightest frost, which usually grows 

 in grassy swamps and moist woods or thickets, where it reaches a height of 1£ to 2 J feet. 

 Eootstock rather slender, creeping just beneath the surface of the ground ; stalks few, 

 generally approximated, slender, brownish-yellow, naked except when very yormg, about 

 a third the length of the fronds ; fronds erect, lanceolate, tapering both ways from the 

 middle, 1 to 2 feet long by 3 to 6 inches wide, acuminate, ciliate and finely hairy along 

 the midribs and veins, pinnate ; pinnae sessile, lanceolate, acuminate, deeply pinnatifid, 

 the lowest two or more pairs gradually shorter and deflexed until the lowest are often 

 mere auricles ; segments flat, oblong, obtuse, entire ; veins mostly simple ; sori small, 

 distinct, marginal ; indusia glandular. 



Occasionally specimens present themselves in which the segments are slightly 

 toothed, the basal ones being sometimes enlarged and more deeply divided, while forking 

 fronds are not extremely rare. A var. suaveolens, D. C. Eaton, is found in New York, but 

 has not been noticed as yet in Canada. It is sweet scented in drying and has the fronds 

 narrower and more rigid with the under surface sprinkled with minute glands. 



This fern is in Canada most common in the Maritime Provinces and finds its western 

 limit in Ontario. Common in swamps and moist places in Nova Scotia. — Rev. E. H. Ball. 

 Common in New Brunswick. — Fowler. Quebec, "Waterloo, Montreal, Que. — Hon. Wm. 

 Sheppard. Eichmond and Drummond Cos., Que. — J. A. Both-well. Mount Belceil, Que. — 

 Maclagan. Ottawa, Out. — J. Fletcher. Prescott, Ont., common. — B. Billings. Kingston 

 and Lakefield, Ont. — Mrs. Traill. Abundant in pine woods, Seymour, Northumberland 

 Co., Out. — Macoun. Hamilton, Ont. — Judge Logie. Toronto, London, Windsor, and Port 

 Cockburn, Muskoka District, Ont. — Burgess. Owen Sound, Out. — Mrs. Roy. Gore Bay, 

 Manitoulin Islands, Ont. — J. Bell. 



2. — A. Thelypteris, Swartz, (Marsh Shield-Fern, Marsh-Fern, Snuffbox-Fern), Syn. 

 Fil., 50. Gray, Man., 664. Provancher, Flor. Can., 118. Pursh., II, 661. Macoun's Cat., 

 No. 2314. Fowler's N. B. Cat., No. "768. Ball, Trans. N. S. Inst. Nat. Sci., IV, 151. Eaton, 

 Ferns of N. A., I, 233. Underwood, Our Nat, Ferns, etc., 105. 



Lastrea Thelypteris, Presl , Lawson, Can. Nat.„ I, 283. 



Acrostichum Thelypteris, L. 



Polypodium Tltelypteris, L. 



Polystichum Thelypteris, Eoth., Watt, Can. Nat., IV, 363. 



Nephrodium Tltelypteris, Desv. 



Dryopteris Tltelypteris, Gr. 



This plant, common in marshes and wet places, but sometimes seen on dry ground, 

 is very like the preceding species, and though more rigid is also very sensitive to frost. 

 It varies in height from 1 J to 4 feet, and has the fertile fronds the tallest and longest 



Sec. IV., 1SS4. 26. 



