PTERIDOPHYTES OF NORTHWESTERN OnTARIO—II 79 
As expected from its northern range, this species was 
found rather generally, our records being: Nipigon; 
mouth of Nipigon River; Fluor Island; Magnet Point; 
Silver Islet Harbor; south shore of North Ombabika 
Peninsula, and Orient Bay, Lake Nipigon; Rabbit Mt., 
and Oliver Creek, Stanley; Pelican Lake, Sioux Lookout. 
Rather peculiarly our collections do not include any 
specimens from any of the stations east of the Nipigon 
River or Lake Nipigon. 
35. Puecoprerts Dryopreris (L.) Fée. (D. Dryop- 
teris Britt.; Dryopteris Linneana C. Chr.) Extending 
far to the north, this species is common in rocky woods, 
on shaded cliffs, ete., our records including: Heron 
Bay; Rossport; Nipigon; Fluor Island; Magnet Point; 
Thunder Cape; Fort William; Longuelac; Jellicoe; 
Orient Bay and Ombabika Bay, Lake Nipigon; Rabbit 
Mt. and Oliver Creek, Stanley; Oscar; Hunt; and Sioux 
Lookout Knob, Graham. 
36. Puegorreris Ropertiana (Hoffm.) A. Br. (Dry- 
opteris Robertiana C. Chr.; Phegopteris calcarea Fée.) 
The general range of this species is on shaded limestone, 
Labrador to Manitoba and Alaska, and south to New 
Brunswick and Iowa, but rare. Klugh notes that for 
Ontario this species is reported only from Lac Seul, 
Rainy River District. Our specimens were found on 
a reddish sandstone (Keweenawan) talus slope about 
one-half mile southeast of Grassy Lake, Silver Islet, 
Thunder Cape; and on low shaded schist outcrop near 
mine prospect, about one mile south of Jellicoe. 
37. Preripium agurtinum (L.) Kuhn. (Pleris aqui- 
lina L.) This almost cosmopolitan fern oceurs abun- 
dantly on open sandy terraces, and in birch-aspen 
Woods, more particularly west and northwest than to 
the north of Lake Superior. Our specimens are from: 
Jellicoe; Nipigon; Orient Bay; Sawyer’s Bay, Thunder 
Cape; Fort William : Stanley; Loon Lake; Oscar, Wat- 
comb; Sioux Lookout Knob and sandy plain, Graham. 
