CANADIAN FILICINBJl. 215 



Peninsula. — Laivson, Billings, Macoun, Logie, Burgess, etc. Mauitoulin Islands, Ont. — J. 

 Bell. Lake of the "Woods. — Dawson. North-West Angle, Lake of the "Woods, Man. — 

 Burgess. 



* * Fronds deltoid or pentagonal, ter-quadripinnate. 



3. — C. Montana, Bernh., (Mountain Cystoperis), Hook., Fl. Bor.-Am., II, 260. Hook.and 

 Baker, Syn. Fil., 104. Maeoun's Cat., No. 2323. Eaton, Ferns of N. A., II, 53. Under- 

 wood, Our Nat. Ferns, etc., 108. 



Polypodium montanum, Lamarck. 



Aspidivm montanum, Swartz, Syn, Fil., 01. 



Cyathea montana, Smith. 



Cysteu montana, Lamarck, Watt, Can. Nat., IV, 363. 



This is one of our rarest, and a very beautiful species of fern, differing markedly 

 from the rest of the genus. It is a delicate plant, reaches a height of 8 or 9 to 16 inches, 

 and grows along creeks in very deeply shaded woods. Rootstock long, slender, creeping, 

 scaly near the apex ; stalks usually much longer than the fronds, scattered, slender, brown 

 at the base but green above, very sparingly chaffy ; fronds deltoid or pentagonal-ovate in 

 outline, 3 to 6 inches long by about the same breadth, smooth except for some small scales 

 along the rachis and midribs, ter-quadripiunate with the rachises, even to the primary, all 

 narrowly-winged ; pinnae pointed, the lowest unequally deltoid-ovate and much larger 

 than those above, which become gradually simply lanceolate ; pinnules ovate-oblong, 

 inferior ones of the lowest pinme very much longer than the upper, divided into second- 

 ary pinnules, which in turn are pinnately incised almost, or even quite, to the rachis into 

 oblong, sharply-toothed lobes ; veinlets generally ending at the indentations between the 

 teeth ; indusia irregularly toothed toward the apex. 



Except in size, this fern does not seem to be subject to much variation. Specimens 

 have been seen with the inferior basal pinnules of the lowest pair of piunse almost as 

 large as the pinnae from which they sprang, and in others the lowest pair of pinnae were 

 very (over 2 inches) distant. 



One of the very rarest of our native ferns. Labrador. — Butler. In a deep ravine, in 

 which flowed a small brook, on the northern face of Mount Albert, Shickshock Moun- 

 tains, Gaspe, Que. ; in a cedar swamp near the silver mine north of Current Eiver, Lake 

 Superior, Out.; abundant in Kicking Horse Pass, Rocky Mountains, N. W. Terr. — Macoun. 

 By streams in shady alpine woods in the Rocky Mountains, Lat. 52°-56'. — Drummond. 



Genus XVI.— ONOCLEA, L., Onoclea. 



1.— 0. sensibilis, L., (Sensitive Fern), Mx, Fl. Bor.-Am., II, 272. Hook., Fl. Bor.-Am., 

 II, 262. Pursh, II, 665. Gray, Man., 668. Provancher, Fl. Can., 111. Lawson, Can. Nat., 

 I, 214. Maeoun's Cat., No. 2321. Fowler's N. B. Cat., No. 764. Ball, Trans. N. S. Inst. 

 Nat. Sci, IV, 154. Watt, Can. Nat., IV, 363. Eaton, Ferns of N. A., II, 195. Underwood, 

 Our Nat. Ferns, etc., 109. 



The Sensitive Fern, which grows in wet places open or shaded, usually measures 

 from 6 inches to 2| feet high. The barren and fertile fronds are extremely unlike, the 

 former being leaf-like, very sensitive to frost, quickly wilting when plucked, and much 



