200 MACOUN AND BUBGESS ON 



sota. Abundant on ledges of limestone about two miles up the left bank of the Becscie 

 River, Island of Anticosti, Que., very typical specimens, 1883. — Macotm. Recorded by 

 Mr. McCord in Can. Nat., Vol. I, p. 355, as found at Sorel, Que., by Lady Dalhousie. Lake 

 of the Woods, Manitoba, collected by Gr. M. Dawson in 18*73, but catalogued as P. Dryop- 

 teris. About one hundred miles north-east of Lake of the Woods, near Lonely Lake, (Lake 

 Seul), Ont—R. Bell. 



[Note. — This fern has been placed as a distinct species in deference to the opinions of 

 Milde, Eaton and other distinguished pteridologists, but from personal observation of the 

 typical plant, as well as a number of specimens which seem to connect it with P. Dryopteris, 

 one is led to the same opinion as that expressed by Mr. Davenport, who, agreeing with 

 Hooker and Baker, ranks it, in the supplement to the Davenport Herbarium Catalogue, 

 only as a variety {Roberlianum) of Dryopteris.] 



^ # # Fronds oblong-lanceolate ; rachis not winged. 



5, — P. Aepestris, Melt., (Alpine Beech-Fern), Eaton, Ferns of N. A., I, 171. Under- 

 wood, Our Nat. Ferns, etc., 101. 



Poli/podium alpestre, Hoppe, Hook, and Baker, Syn. Fil., 311. 



Polypodium rhoetkum, L. 



Aspidium alpestre, Swartz, fy*-&e.j ^3/ 



Aspidium rhoetkum, Swartz, J^.. £e.,r?- 



Asplenium alpestre, Mett. 



This species differs greatly from the rest of its genus, and has a strong general resem- 

 blance to Asplenium Filix-foemina, from which, however, it is easily distinguished by the 

 absence of indusia. It is non-evergreen, and grows in tufts, reaching a height of 16 to 34 

 inches. Rootstock short, erect or oblique, thickened with old stalk-bases; stalks 4 to 10 

 inches long, black and slightly chatty at the base but pale brown and smooth above ; 

 fronds 1 to 2 feet long by 3 to 6 inches wide, acuminate, membranaceous, smooth, pin- 

 nate ; pinnae deltoid-lanceolate in outline, twice parted ; pinnules oblong-lanceolate with 

 sharply toothed ultimate segments ; sori copious and submarginal. 



No Canadian specimens of this plant have been obtainable for examination, but in a 

 list of Kew specimens it is reported as having been found in the Cascade Mountains of 

 British Columbia, about Lat. 49 a , by Dr. Lyall. 



Genus XIV.— ASPIDIUM, Swartz, Shield-Fern, Wood-Fern. 



§ Indusium kidney-shaped or round, with a narrow sinus. 



* Fronds thinly membranaceous, decaying in autumn ; stalks and slender, creep- 

 ing rootstocks nearly naked Veins simple or once forked. 



£rt*. ,£?., rr. 

 1. — A. Noveboracense, Swz., (New York Shield-Fem), A Pursh, II, 661. Gray, Man., 



664. Macoun's Cat., No. 2315. Fowler's N. B. Cat., No. 754. Ball, Trans. N. S. Inst. Nat. 



Sci., IV, 151. Eaton, Ferns of N. A., I, 49. Underwood, Our Nat. Ferns, etc., 104. 



A. thelyplerioides, Swartz, Syn. Fib, 57. 



A. thelypteris, Hook. 



A. thelypteris, var. Noveboracense, Willd, Provancher, Flor. Can., 718. 



