260 



FILICES. lAspidium. 



Am, 2. p. 662. — Polypodium, Sw. — Woodsia Perriniana, HooL et Grev. Ic, FiL L /. 

 68. — Alsophila Pernniana, Spreng. 



Hab, West side of the Rocky Mountains, near the sources of the Columbia, Dritmmond: and elsewhere on 

 the higher parts of the Columbia. Douglas. — This is the Alsophila Perriniana of Sprengel, and it is perhaps 

 by some mistake that it is said to be a native of St Thomas, It seems however to have a wide range in 

 N, America, yet to be found nowhere plentifully. — The Genus is distinguished from Woodsia^ to which it 

 is very nearly allied, by the presence of an hemispherical indusium which covers the whole sorus and then 

 splits from the top into several lacinated segments. 



5. CISTOPTERIS. Bernh, 



1. C.fragilis, Bernh, — Atbyrium, Rich. App. p, 39. — Cyathea, E, Bot t 1587, — Ph. 

 p. laciniis latioribus minus divisis. C. tenuis, SchoiL — Aspidium tenue, Willd. — PA. 

 Neplirodium, Mx. 



1 



Hab. Canada, Mrs Percevaly Goldie; to Slave Lake and to the Rocky Mountains. I)r Richardson, 

 Drummond.-:-T\V\s species varies a good deal in North America ; but not more so than it does in Europe. 

 The C. tenuis is only a form with broader and less deeply divided lacinise, 



2. C montana^ Link, — Aspidium, Suk — Schkuhr, Fil. t, 63. ^ 



Hab. Shady alpine woods by streams in the Rocky Mountains. Drummond. — This is quite new to the 

 Flora of N. America. The specimens entirely accord with Europaean ones. The species cannot indeed 

 readily be mistaken, well marked as it is by its small exactly triangular and much divided frond, with the 

 fructification precisely resembling that of C, fragilis, — May not the Aspidium atomarium, Muhl, and 

 Willdenow, be a variety of this plant? 



3. C. bulbifera, Bernh. — Aspidium, Sw. — Schkh. Crypt t. 57. — Ph. — Nephrodium, Mx. 



Hab, Canada, Mrs Sheppard, Goldie. 



6. ASPIDIUM. Sw. 



1. J. (Lastrea) Thelypteris^ Sw, — E, BoL t. 1018. Schkh, FiL t 52. — A. thelyp- 

 teroides, Si^.—Nephrodiumj iWo:. — Aspidium Noveboracensej Sw Ph Schkh. Fil t. 46, 



Hab. Canada. Michaux. Mrs Perceval. Mrs Sheppard.—The A. Novehoracense is quite identical with 

 A. Thelypterxs. 



2. A. (Lastrea) Goldianum, Hook, in Ed. Phil, Journ, 6. p. 333. Hook, et Grev, Ic. 

 Fil. t 102 A. Filix Mas, Ph. Am, 2, p. 662. 



Hab. Canada. Dr Holmes. About Montreal. Goldie. Mrs Perceval. Mrs Sheppard.—This is a most 

 distinct sppcies, and though apparently rare in British N. America, seems to be common in the United States, 

 whence it is not unfrequently sent as A. Filix Mas: and there is every reason to believe that this is what 

 Pursh had in view for that plant. 



3. A, (Lastrea) marginale, Willd.— Ph.—Schkuhr^ Fil, L 45. b. 



Hab. Canada. Mrs Sheppard, Mrs Perceval, to the Saskatchawan. Dr Pichardson, Drummond. 



