PTERIDOPHYTES OF NORTHWESTERN ONTARIO 39 
granite, Ombabika Post; and in mixed woods on diabase, 
North Ombabika Peninsula, L. Nipigon; mixed woods, 
Graham. 
26. Dryopteris fragrans (L.) Schott. On diabase 
cliff east of Virgin Falls, on diabase talus slope east side 
Orient Bay, and on steep diabase cliff south shore North 
Ombabika Peninsula, L. Nipigon; in crevices on bare 
knob of Sioux Lookout Mt., Graham. Perhaps the most 
characteristic fern of the Lake Nipigon region—abound- 
ing on the numerous cliffs and talus slopes. 
27. Dryopteris cristata (L.) Gray. Along mountain 
rivulet and in marshy Myrica bog, Orient Bay, 
28. Dryopteris intermedia (Muhl.) Gray. Conmee, 
20 miles north of Nipigon; damp woods, Virgin Falls, 
foot of L. Nipigon; wooded top of diabase hill, Sand 
Point, L. Nipigon; under Alnus along border of rivulet, 
Ombabika Post; mixed woods and in Frazinus nigra 
swamp, s. end Pelican Lake, Graham. 
29. Filix fragilis (L.) Underw. Crevices in high 
diabase cliff, Orient Bay, on rocks east of Virgin Falls, 
and on low diabase cliff s. w. shore North Ombabika 
Peninsula, Lake Nipigon; sheltered mossy bank, slope 
of Sioux Lookout Mt., Graham. 
30. Woodsia ilvensis (L.) R. Br. Diabase cliff, east 
of Virgin Falls, on diabase talus slope, Orient Bay, and 
on rocks along shore of N. Ombabika Peninsula, L. 
Nipigon; bald top of Sioux Lookout Mt., Graham. 
31. Onoclea sensibilis L. Along C. N. R. right-of- 
way, Orient Bay, L. Nipigon. Not seen farther north. 
32. Matteucia Struthiopteris (L.) Todaro. Bottom of 
deep narrow gorge, Orient Bay, Lake Nipigon. 
CarNnEGIE Museum, Fes. 6, 1915. 
