268 GEOLOGICAL SURVEY OP CANADA. 



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

 N.S. {Macoun, Burgess.) Farmersville and Delta, Ont. (Lauson.) 

 Ottawa, Ont. (^Fletcher.) Belleville, Ont. (Macmin.) London, Ont. 



(Bwgess.) 



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



(HART'S-TONGUE.) 



(2;t96.) S. vulgare, Smith, M^m. Acad. Tiuiu, v., 421. Hook. & 

 Baker, Syn. Fil.. 246. Lawson, Can. Nat., i., 278. Macoun & 

 Buigess, Trans. Boy. Soc. Can., ii., sect.iv., 195. Burgess, Trans. 

 Roy. Soc. Can., iv., sect, iv., 12. 



S. officinarum, Swartz, Schrad. Journ., ii., 61 ; Syn. Fil., 89. Pursli, 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, X.B. {Sutton, Jack.) Abundant on limestone 

 debi'is under the clifl's at Sj'denham 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. marginntum, ramosum, and multifidum, were collected near 

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



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



(WALKING-LEAF.) 



(299*7.) C. rhizophyllus, Link, Hort. Berol., ii., 69. Lawson, 

 Can. Nat., i., 279. Macoun & Burgess, Trans. Eoy. Soc. Can., 

 ii., sect. iv.. 196. 



Asplenium rhizophyllum, Linn., Sp. I'l., 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 u-Plouffe, rear of the Island of Montreal, (Jue. 

 {McCord.) Isolated locks in a shaded pasture, Hemmingford, Que. 

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

 Mere, Chelsea, Que. {Fletcher.) Rocky woods, near Oxford Station, 

 on the Ottawa and PrescottRy., Ont. {Billings.) Crevices of limestone 



