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The remaining portion of Ontario is characterized by 

 the frequency and extent of the outcrops of various lime- 

 stone formations, and here we find the richest fern-flora. 



The Catalogue of Canadian Plants, Part V., by Prof. 

 John Macoun, has been of great service to me in the 

 preparation of this list, and I wish here to thank the fol- 

 lowing botanists who have kindly contributed notes : Drs. 

 J. Fletcher, John Macoun, N. Scott, P. J. Scott, J. Dear- 

 ness, Rev. Dr. Campbell, Rev. C. J. Young, Messrs. J. M. 

 Macoun, W. Herriot, J. White, W. C. McCaila, F. Mitch- 

 ell, W. E. Saunders, D. W. Beadle, J. Morrison, E. E. C. 

 Kilmer, G. L. Fisher, F. P. Gavin, and Miss A. Saunders. 



OPHIOGLOSSACE^. 



Ophioglossum vulgatum L. Low meadows. Rare, but 

 distributed throughout the province. 



Botrychium simplex E. Hitch. Meadows, damp woods 

 and hillsides. Rare. Reported from a small island east 

 of St. Joseph's Island, Georgian Bay, by J. Bell, as com- 

 mon ; near Fort William, north shore of Lake Superior, 

 by Macoun, and from Gait, Waterloo County, by Herriot. 



Botrychium luiiaria Sw. Damp meadows and thickets. 

 Very rare. Reported from the vicinity of Lake Nipigon, 

 Thunder Bay District, by Macoun, and Stiltsville, Carle- 

 ton County, by J. M. Macoun. 



Botrychium lanceolatum Angs. Low pastures and rich 

 woods. Very rare. Reported from Martentown, Glen- 

 garry County, by Campbell, and from Niagara Falls by 

 Cameron. 



Botrychium matricarccfoliiim A. Br. Damp hillsides, 

 pine woods, gravelly cliffs and thickets. Rare. Reported 

 from Casselman, Russel County, by Fletcher, and from 

 Belleville, Hastings County ; Campbellford, Northumber- 

 land County ; Nipigon River and Lake Nipigon, Thunder 

 Bay District, by Macoun. 



Botrychium ternatum obliquum D. C. Eaton. Fields 

 and dry woodlands. Scarce, but widely distributed. 

 Ranges north to Hudson Bay. 



