268 GEOLOGICAL SURVEY OF CANADA. 



extremely rare, especially in Ontario. Salt Mountain, Whycocogmah, 

 N.S. (Macoun, Burgess.) ParmerBville and Delta, Ont. (Lawson.) 

 Ottawa, Ont. (Fletcher.) Belleville, Ont. {Macoun.) London, Ont. 

 (Burgess.) 



750. SCOLOPENDRIUM, Smith, Acta. Taur., v. 4IO. 



(HART'S-TONGUE.) 



(2996.) S. VUlgare, Smith, M^m. Acad. Turin, v., 421. Hook. & 

 Baker, Syn. Fil., 246. Lawson, Can. Nat., i.,^2'78. Macoun & 

 Burgess, Trans. Eoy. Soc. Can., ii., sect, iv., 195. Burgess, Trans. 

 Eoy. Soc. Can., iv., sect, iv., 12. 



jS. offieinarum, Swartz, Schrad. Journ., ii., 61 ; Syn. Fil., 89. Pursh, Fl. 

 Am. Sept., ii., 667. 



One of the rarest of American ferns, and is found growing in tufts 

 in wet shade on limestone rocks. Only three stations are known in 

 Canada. Woodstock, N.B. (Sutton, Jack.) Abundant on limestone 

 debris under the cliffs at Sydenham Falls and other localities around 

 Owen Sound, Ont. (Mrs. Boy.) On Guelph dolomites. Little Sau- 

 Eiver, Durham, Grey Co., Ont. (H. M. Ami.) It is a very variable 

 species and three of the forms, which have been known, respectively, 

 as vars. marginatum, ramosum, and multifidum, were collected near 

 Woodstock, N.B., by Mr. Jack. 



751. CAMPTOSORUS, Link, Sp. Fil. Beroi., 83. 



(WALKING-LEAF.) 



(299T.) C. rhizophyllus, Link, Hort. Berol., ii., 69. Lawson, 

 Can. Nat., i., 2*79. Macoun & Burgess, Trans. Eoy. Soc. Can., 

 ii., sect, iv., 196. 



Asplenium rhizophyllum, Linn., Sp. PL, 1536. Swartz, Syn. Fil., 74. 

 Michx., Fl. Bor.-Am., ii., 264. Provancher, Fl. Can., 715. 



Occurs on shaded, mossy, limestone rocks. Montreal Mountain, Que. 

 (Provancher.) L'Abord ^Plouffe, rear of the Island of Montreal, Que. 

 (McCord.) Isolated rocks in a shaded pasture, Hemmingford, Que. 

 (Goods.) Limestone rocks west of Hull, and in a ravine near King's 

 Mere, Chelsea, Que. (Fletcher.) Eocky woods, near Oxford Station, 

 on the Ottawa and Prescott Ey., Ont. (Billings.) Crevices of limestone 



