2G4 FILICES. IDicksonia. 



2. P, (Allosorus) atro-purpurea, L, — Mx, — Schkuhr, FiL L 100. Ph. — P. gracilis, 

 var. nana? Rich, App. p* 39. 



Hab. Canada to Bear Lake and the Rocky Mountains. Dr Richardson. Drummond. Douglas. - 



3. P. (Allosorus) gracilis; tenuis, fronde lanceolata, sterili pinnata pinnis pinilatifidis 

 laciniis paucis late ovatis obtusissimis tenuissimis, fertili bipinnata pinnis lineari-oblongis 



.crenatis, rachi concolore, stipite atro-fusco nitidissimo. — Mx, Am. 2. p. 262. Ph. Am. 2. 

 p. 668. — Cheilanthesj Kaulf. — Spr. 



Hab. Canada, Michauxy Goldie; to the Saskatchawan. Drummond, Dr Richardson. — This is a very 

 . distinct species, though sometimes confounded with the preceding. 



13. CRYPTOGRAMMA. Br. 



1. C. acrostichoides {Br.); frondibus bipinnatifidis, sterilium pinnulis ovalibus crenatis, 

 fertilium demum explanatis, soris linearibus discum totum occupantibus. Br. in Rich. App. 

 p. 39. etp. 54. Hook, et Grev. Ic. Fil. t. 29. Bong. Veg. Sitcha, p. 58. — Allosorus, PresL 



Hab. Nutka Sound. Menzies. Stony places in the Rocky Mountains, but rare : to the sources of the 

 Columbia, Drummond, and thence to the Grand Rapids of the Columbia, and the mountains of Macgillivray's 

 River, Douglas. Cumberland House Fort to Bear Lake. Dr Richardson. 



2. C. crispa, Br. — Hook. Brit.FL ed. 4,/?. 389. — Allosorus crispus, Bernh Katilf.Enuin, 



p. 143. 



Hab. Unalaschka. Chamisso. — May this not be the previous species ? 



14. ADIANTUM. X. 



1. A. pedatum^ L. — Mx. Am. 2. p. 263. Schk. FiL t. 115. Ph. 



Hab. Canada. Michaux. Pursh, Mrs Sheppard. Lake Huron. Dr Todd. Columbia River, N. W, 

 Coast. Dr Gairdner. Dr Scouler. Douglas, 



15. CHEILANTHES. Sw. 



1. C. vestita^ Sw, — Ph. Am, 2. p. 670. — Schkuhr^ FiL t 124. — Nephrodium lanosum, 

 Mich. Am. 2.;>. 270. 



Hab. Alpine woods in the Rocky Mountains. Drummond, New Caledonia, N. W. Am. Douglas, 



16. DICKSONIA. rHeriU 



1. D. pilosiuscuiay Willd. Enum. p. 484. Ph. Am.p. 671. — D. pubescens, Schkuhr, FiL 

 t. 131. — Aspidiumpunctilobum, fVilld. — Ph. Am. 2. p, 664. — Nephrodium punctilobum, 

 Mx. 



Hab, Canada. Dr Holmes. New Brunswick. Mr Kendal. 



