278 Synopsis of Canadian Ferns and Filicoid Plants. 



simple (not forked) ; sori never confluent ; stipe short, rachis, &c. downy, 

 pinnules more or less distinctly ciliate. Lastrea Noveboracensis, Presl ; 

 Pohjpod'mm Novehoracense, Linn., Schk. Aspidium thelypteroides, 

 Swartz. Aspidium Novehoracense, Willd., A. Gray, Eaton — Pittsburg 

 near Kingston; Laketield, North Douro, Mrs Traill; Mountain side, 

 Hamilton, Judge Logie ; Prescott, common, B. Billings, jr. ; Mount 

 Johnson, Montreal, and Beloeil, P. W. Maclagan, M.D. ; Ramsay, 

 Rev. J. K. M'Morine, M.A. ; near Chelsea, D. M'Gillivray, M.D. ; Lon- 

 don, but not common, W. Saunders ; L'Ofignal, J. Bell. This fern 

 belongs exclusively to the American Continent. It seems to be more 

 abundant and more distinct in the United States than with us. In 

 Flora Boreali- Americana, Sir William Hooker observed — " The Aspi- 

 dium N oveboracense is quite identical v/ith A. Thelypteris." In the 

 recently published volume of Species Filicum (which, at present I can 

 only quote at second hand), doubts are still expressed as to its being a 

 species really distinct from L. Thelypttris. Mr Eaton and other Ame- 

 rican pteridologists think it quite distinct. Its most obvious characters 

 are — (1.) The tapering form of the lower part of the frond (although there 

 is also a foim of L. Thelypteris having this peculiarity; (2.) sori few, 

 mostly near the base of the pinnules, and not confluent, not overlapped 

 by a recurved margin ; (3.) veins of the pinnules simple, not forked. 

 The outline of the frond must not be depended upon, as the Scotch and 

 Irish L. Thelypteris is narrowed at the base like L. Nov-Eboracensis. 

 This species is allied to L. montana, Moore (Oreopteris, Bory). 



POLYSTICHUM. 



P. angulare, /3. Braunii. — Frond soft, herbaceous, lanceolate, bipin- 

 nate ; pinnules stalked, serrate ; the small teeth tipped by soft bristles ; 

 stipe and rachis scaly throughout In the Canadian plant the scales of 

 the rachis are larger than in the typical P. angulare of England, from 

 which it may be specifically distinct. Aspidium Braunii, Spenner. 

 Aspidium aculeatum var. Braunii, A. Gray, Man. Bot.. p. 599, A. 

 aculeatum, Provancher ; Harrington, Cap Bon Ami and Dartmouth, 

 N. fork, Gaspe, John Bell, B.A. ; base of Silver Mountain, W. S. M, 

 D'Urban. 



P. Lonchitis, Roth.— Frond rigid and shining, linear-lanceolate, sim- 

 ply pinnate ; pinnas scythe- shaped, auricled, spinose. Polystichum 

 Lonchitis, Roth, Moore, J. Sm., &c. Polypodium Lonchitis, Linn. 

 Aspidium Lonchitis, Swartz, Schk. — Limestone rocks, Owen Sound, 

 C.W., 1859, Rev. Professor William Hincks, F.L.S. Professor 

 Hincks has kindly furnished me with specimens from the above locality. 

 Woods, southern shore of Lake Superior and north-westward, Professor 

 Asa Gray, in Man. Bot., N.S. ; British America, Professor Woods in 

 Class-Book. It will be observed that Professor Hincks's station is the 

 only definite Canadian one with which we are acquainted. Mr T. Drum- 

 mond found this fern on the Rocky Mountains many years ago. 



P. acrostichoides, Schott. — Frond pale green, shining, long and nar- 

 row, linear-lanceolate, simply pinnate ; pinnae long and narrow, linear- 

 lanceolate, shortly stalked, auricled anteriorly at the base, more or less 



