268 THE CANADIAN NATURALIST. [^^g- 



Nat. Ord. POLYPODIACE^. 



POLYPODIUM. 



P. vulgare, Linn. — Frond linear-oblong or somewhat lanceolate, 

 more or less acuminate, deeply pinnatifid, in some forms almost 

 pinnate ; lobes (or pinna3) linear-oblong, obtuse, often acute, rarely 

 acuminate, entire or crenate or serrate ; sori large ; very variable 

 as regards outline of the frond, form, &c., of the lobes, and serrature. 

 P. vulgare, Linn., A. Gray, Moore, &c. P. Virginianum of English 

 gardens. P. vu/gare, var. Americanum, Hook., Torrey, Fl. N. Y., ii, 

 480. — On rocks in the woods, not rare around the city of Kingston ; 

 abundant on the rocky banks of the St. Lawrence, in Pittsburg ; 

 in the woods at Collins's Bay ; and on Judge Malloch's farm, a mile 

 west from Brockville ; Gananoque lakes and rivers ; Farmersville ; 

 Newboro on the Rideau ; Toronto ; on the great boulder of the 

 Trent Valley, near Trenton ; on rocks west from Brockville, outcrop 

 of Potsdam sandstone at Oxford, and Hull, mountains near Chelsea. 

 C. E., B.Billings, jun. ; near Gatineau Mills, D. M'Gillivray, M.D. ; 

 Mount Johnson, C. E., and Niagara River, P. W. Maclairan, 

 M.D. ; Brighton, in the crevice of a rock in a field, and abundant 

 on rocky banks right bank of the Moira, above Belleville, J. Macoun; 

 Ramsay, Rev. J. K. McMorine, M.A. ; north-west from Granite 

 Point, Lake Superior, R.IBell, jun.; mountain top,near Mr. Brydge's 

 house, Hamilton, C. W., Judge Logic ; River Rouge and lower end 

 of Gut Lake, W. S. M. D'Urban ; Cape Haldimand, Gaspe, John 

 Bell. B A. ; Red River Settlement, Governor M'Tavish ; foot of 

 Cape Tourmente, Abb^ Provancher ; L'Orignal and Grenville, 

 C. E., J. Bell, B.A. The habitats above cited show that although 

 this fern is not so common in Canada as in Britain, it is neverthe- 

 less widely distributed. It is common in New York State, accord- 

 ing to Professor Torrey, and in the Northern States generally ac- 

 cording to Professor Asa Gray ; rarer in the South, according to Dr- 

 Chapman. 



P. hexagonopterum, Mich. — Frond triangular in outline, acumi- 

 nate, pinnate, hairy throughout; pinnae broadly lanceolate, pinna- 

 tifid ; lowest pair of pinnge larger than the others, not deflexed ; 

 lobes of the pinnae linear-oblong or lanceolate, strongly toothed, or 

 almost pinnatifid. The decurrent pinnas haYe a tendency to form 

 conspicuous irregular-angled wings along the rachis. IStipe not 

 scaly except at the base. Rhizome long, slender, ramifying. "Whole 

 plant much larger than P. Phegojpteris, and quite a different species. 



