Nephr odium g oldie anum Hook. Woods. Widely dis- 

 tributed and frequent locally. Extends as far north as 

 Ottawa and Owen Sound. 



Nephrodium cristatum Michx. Swales and wet woods. 

 Widely distributed and abundant locally throughout the 

 province. 



Nephrodium cristatum clintonianum Gilbert. Swales 

 and wet woods. Scarce but widely distributed. 



Nephrodium boottii Dav. Swamps, swales and damp 

 woods. Rare. Reported from Kemptville, Grenville 

 County, by Porter ; Belleville, Hastings County, by Ma- 

 coun ; Hamilton, Wentworth County, by Logis ; London, 

 Middlesex County, by Burgess ; Snellgrove. Peel County, 

 by White, and Innerkip, Oxford County, by Mitchell. 

 Found by the writer at Arkell, Puslinch Lake and Pike 

 Lake, near Mount Forest, all in Wellington County. At 

 Belleville it was growing with A r . cristatum clintonianum 

 and N. spinulosum, and in every case where found by the 

 writer it was growing with N. cristatum and N. spinulo- 

 sum. AVhile the Puslinch Lake specimen must for the 

 present be included under the so-called species N. boottii, 

 it is without doubt a hybrid between N. cristatum and N. 

 spinulosum, as fronds of these two and of A r . boottii all 

 grew from the same root. The Snellgrove, Pike Lake 

 and Arkell records are all for single plants. So far all 

 the evidence obtained by the writer point to the hybrid 

 origin of A T . boottii. 



Nephrodium spinulosum Desv. Woods. The type 

 which includes the unstable ferns known as varieties in- 

 termedium and dilatation is abundant throughout the 

 province. 



Polystichum acrostichoides Shott. Woods. Common 

 throughout the province as far north as Owen Sound. 

 The form incisum is reported from London and Hamilton 

 by Burgess, and Owen Sound by Macoun, and it and the 

 form crispum found at Guelph by the writer. 



Polystichum lonchitis Roth. Limestone rocks. Com- 

 mon on the limestone ridges from Woodford west through 



