1864.] LAWSON ON CANADIAN FERNS. 275 



variety, passing by intermediate states into the typical plant, which 

 is the common form of northern Europe. The variety is the 

 prevalent form in Canada, but also occurs farther south in the 

 United States, for I have specimens from Catskill (A 0. Brodie) ; 

 and is not confined to the American continent, for Professor 

 Caruel, the acute author of " Flora Italiana," sends specimens 

 of a similar form from Florence. There is an A. Trich. var. 

 mojus, in Cuba (according to Mr. Eaton's enumeration of 

 "Wright's Cuban ferns). A. anceps is a Madeiran form, not dis- 

 tinguishable, so far as I can see, from common European states of 

 A. Trlchomanes. 



A. viride, Hudson. — Frond small, linear, pinnate ; pinnae 

 roundish-oblong or oval, more or less cuneate at base, slightly 

 stalked, crenate or slightly lobed ; rachis bright green; sori 

 approximate to the midrib; in outline of frond and general aspect 

 resembles the preceding species. A. viride, Hudson, Flora 

 Anglica, 385 ; Sm., Bab., Moore, &c. A. TricJiomanes, /3 ramo- 

 siim, Linn. — This beautiful alpine fern was found in Canada for 

 the first time last summer, having been collected in considerable 

 quantity at Gasp^, C.E., by John Bell, B.A., who formed one of 

 a party of the Provincial Geological Survey. It was previously 

 known to occur sparingly in N. W. America, at one spot on the 

 Rocky Mountains, and in Greenland. Mr. Bell's discovery of its 

 occurrence in Gaspe is therefore extremely interesting in a 

 geographical point of view. The Gaspe specimens, although 

 young, agree perfectly with the typical European form of A. viride, 

 of which I have a full series of Scotch examples, as well as others 

 collected in Norway by T. Anderson, M.D. In young specimens 

 the pinnae are usually large, thin, and more cuneate and lobed 

 than in the mature plant, in which they aie roundish-ovate. 



A. angustifolimn^ Michx. — Frond large (1 to 3 feet high), 

 annual, lanceolate, pinnate; pinnae long-^ linear-lanceolate, acute; 

 fertile fronds more contracted than the barren ones, " bearino* 

 sixty to eighty curved fruit-dots on the upper branches of the 

 pinnate forking vein-s," (Eaton). A. angusti folium, Michaux, A. 

 Gray, Eaton, J. Smith, Lowe's Ferns, vol. v, pi. 24. — In Canada 

 this fern appears to be confined to the extreme south-western point 

 of the province ;^'^ Maiden, P. W. Maclagan, M.D. ; at the Oil 

 Wells, township of Enniskillen, Lady Alexander Russell. For 



• Subsequently found in the Belleville district by Mr. Macoun. 



