1864.] LAWSON ON CANADIAN FERNS. 293 



Junction, rare, B. Billings, jr. ; St. Joachim, Abb^ Provancber; 

 L'Orignal, J. Bell: English's Woods, W. Saunders; in the 

 Northern States this species grows in dry rich woods, *' mostly 

 southward," according to Professor Gray's Manual. 



B. ohliquum, Muhl., appears to be chiefly distinguished by its 

 larger size, more compound fertile frond, and the narrower oblique 

 divisions of the barren one. B. ohliquum (Muhl.), Pursh. Fl. 

 Amer. Sept., vol. ii, p. 656. Newfoundland, Dr. Morrison in 

 Hook. Fl. Bor. Amer; Wesleyan Cemetery, London, W. Saun- 

 ders. 



B. Lunaria, — Swartz. — Barren branch sessile, arising from the 

 middle of the stem, thick and leathery, oblong, pinnate; pinnae 

 lunate or fan-shaped slightly incised on the rounded margin. 

 Botrychiiuii Lunaria, Swartz, Schk., Hook., Moore, J. Sm. 

 Osmunda Lunaria, Linn. — Nipigon, 1853, Governor McTavish ; 

 N.E.America, Dr. Hooker's tab. ; Newfoundland, Saskatchewan, 

 and Rocky Mountains to Behring's Bay in N. W. Am., T. Moore, 

 Hbk. Brit. Ferns. 



Ophioglossum. 



[0. vulgafum, L., which is widely distributed throughout 

 Europe and Northern Asia, and grows also in the Northern United 

 States, although there " not common," is to be looked for in 

 Canada. In one of its forms (0. reticulatum, Linn.), it extends 

 to the West Indies.] 



Nat. Ord. LYCOPODIACE^.^ 



Plananthus. 



p. Selago, Pallisot-Beauvois. — Stem dichotomously branched, 

 erect fast igiate; leaves in about 8 rows, more or less convergent or 

 spreading, lanceolate, acuminate, entire; sporangia in the axils of 

 the common leaves (not in spikes). Lycopodium Selago, Linn., 

 E. B., Bigelow, Beck, Hook and Grev., Torrey Fl. N. Y. ii, p. 

 508, Gray. — Labrador, Hudson Bay to Kocky Mountains, Hcok. 

 Fl, B. A. ; shore of Lake Superior and northward, Professor A. 

 Gray, Man. Bot., N. S., p. 603. I have not seen Canadian speci- 



* In this order the arrangement of A. M. F. J. Pallisot-Beauvois is 

 adopted, as it seems to afford the best basis for a re-adjustment of the 

 genera of Lycopodincece, which is much required. For P.-B.'s genus 

 Lepidotis, I have thouglit it better to substitute the name Lycopodium, an 

 old name that should not be discarded. 



