NATURAL HISTORY, TORONTO REGION 
29. ONoclea  struthiopteris, Hoffm. (Ostrich 
Fern). This is one of our best known ferns, grow- 
ing mostly in moist, open situations. Under favour- 
able conditions it reaches a height of four or five feet. 
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OsMUNDACEAE. 
1. Osmunda regalis, L. (Royal Fern or Flower- 
ing Fern). Common northward along the borders 
of streams and ponds, also throughout Ontario locally. 
2. Osmunda claytoniana, L. (Interrupted Fern). 
Near Toronto, in Ashbridge’s “ Wood,” High Park, 
and along the Humber River. Distributed through- 
out Ontario. 
3. Osmunda cinnamomea, L. (Cinnamon Fern). 
This species is often found in the same localities as 
the preceding, but usually in more moist and shaded 
localities. 
OpxHIOGLOSSACEAE. 
1. Ophioglossum vulgatum, L. (Adder’s-tongue). 
Very rare near High Park, Toronto. Near Port 
Sydney, Muskoka, Ont., it occurs in long grass in 
damp ground, in shaded situation. 
2. Botrychium lunaria, Sw. (Moonwort). This 
has been reported from Northern Ontario. 
3. Botrychium simplex, Hitchcock (Little Grape- 
fern). Found in one locality in open woods near 
High Park, Toronto. Also reported frequent on 
upland pastures in Peel County (White). 
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