Synopsis of Canadian Feriis and Filicoid- Plants. 279 



distinctly serrate, with hair-tipped teeth ; fertile (upper") pinnae slightly 

 contracted, covered beneath by the large confluent sori ; stipe profusely 

 chaffy, with pale scales. Polystichum acrostichoides, Schott, J. Sm. 

 Asjndium acrostichoides. Swartz, A. Gray, Eaton. Aspid. aiiricida- 

 tum^ Schk. Nephrodium acrostichoides, Michx. — Abundant in the 

 woods a few miles west from Kingston ; also not rare in the woods of 

 the Midland District of Canada generally ; Upper Rideau Late ; woods 

 around Toronto, Rev. Dr Barclay ; Stanfold, M. L'Abbe Provancher ; 

 L'Orignal, J. Bell ; London, W. Saunders : Sulphur Spring, Hamilton, 

 Judge Logie ; Prescott, common, B. Billings, jr. ; Nicolet and St Valen- 

 tine, C.E., and Chippawa, C.W., P. W. Maclagan, M.D. ; Belleville, 

 very common in rocky woods, as in Hop Garden, J. Macoun ; Ramsay, 

 Rev. J. K, M Morine, M A. ; hills and woods, portage to Bark Lake, 

 W. S. M. D'Urban ; Gilmour's Farm, Chelsea, D. M^Gillivray, M D. ; 

 Osnabruck and Prescott Junction, Rev. E. M. Epstein. This species is 

 exclusively American. 



1(3 incisum ; pinna3 strongly serrate or incised into lobes. Aspi- 

 dium Schweinitzii, Beck. This form, which I have from Schooley's 

 Mountains, &c. (A. 0. Brodie), will no doubt be found in Canada ] 



CVSTOPTERIS. 



C. fragilis, Bernhardi. — Fronds delicate, green, lanceolate in outline, 

 glabrous, bipinnate ; pinnae and pinnules ovate-lanceolate or oblong ; the 

 latter obtuse, incisely toothed, thin and veiny ; sori large ; stipe dark 

 purple at the base. Cystopteris fragiUs, Bernhardi, Hook., Bab., Moore, 

 Newm., A. Gray. Polijpodium fragile, Linn. Cystopteris orientalis, 

 Desvaux. Polypod. viridulum, Desv. Athyrium fragile, Sadler. 

 Cyathea fragilis, Sin. C. cynapifolia and C. anthriscifolia, Roth. 

 Cystea fragilis, Sm. Cyclopteris fragiUs, S, F. Gray. — Rocky woods 

 and cliffs about Kingston, in various places, but not abundant ; Far- 

 mersville ; Mountain side, Hamilton, on moist rocks, Judge Logie; 

 rocks by the bay shore, L'Anse au Cousin, and Dartmouth River, 

 Gaspe, John Bell, B A. ; Mirwin's woods, Prescott, common, B. Billings, 

 jr. ; Montreal and Jones's Falls, P. W. Maclagan, M.D. ; rocky banks of 

 the Moira, rather rare, J. Macoun ; Ramsay, Rev. J. K. M'Morine, M.A. ; 

 camp at base of Silver Mount, on rocks, also River Rouge, abundant, 

 De Salaberry, west line, and at Black Lead Falls, W. S M. D'Urban ; 

 St Joachim, M. L'Abbe Provancher; Grenville, C E., John Bell, B.A. ; 

 London, W, Saunders. In Dr Hooker's valuable Table of Arctic Dis- 

 tribution this plant is indicated as a Canadian species that does not enter 

 the United States, which I presume arises from a misprint, as the species 

 is not uncommon in the Northern States, and extends south to the Moun- 

 tains of Carolina. The delicate 0. tenuis is the form known in the south, 

 but in Canada we have the stout typical European form of 0. fragilis. 



S.angustata. — P.innules incised, withlongish and spreadingteeth. Cyst, 

 frag. var. cyn ipifolia, J. Lowe. — Gasp§, John Bell, B A. Specimens 

 referable to this form were likewise gathered at Lake of Three Moun- 

 tains by Mr D'Urban. Mr Bell's specimens agree perfectly with English 

 specimens from Dr John Lowe (C. f. cynapifolia). Italian specimens 

 from Professor Caruel of Pisa, labelled " Cyst, fragilis,''' belong to this 



