— 104— 



away of the woods and letting in of additional light and 

 air upon this Osmund a is responsible for its change in 

 form. It seems to me that all of these variations arise 

 from some inherent tendency of ferns in that direction. 

 It is the life force of the plant trying to express itself 

 in new and different forms. 

 Clayville, N. Y. 



SCOLOPENDRIUM VULGARE IN ONTARIO. 



By A. B. Klugh. 



Scolopendrium vulgare has been recorded in Ontario 

 only from Owen Sound and Durham, both in Grey 

 County. At the former station it has been collected by 

 Professor Macoun, Dr. Saunders and others. At the 

 latter station it was found by Dr. H. M. Ami. Mr. James 

 White reported it to me from Woodford, Ontario, and 

 Mr. W. E. Saunders reported to me that in June, 1905, 

 he had found it three miles above Colpoy's Bay, thus 

 making the first record for Bruce County. 



The month of August. 1905, I spent in determining the 

 range of this plant, and the accompanying map shows the 

 result of the investigation. The whole region is full of 

 out-crops of limestone, which in many places forms 

 ridges and cliffs, some 200 feet in height. Such a cliff 

 runs from Inglis Falls round to Lion's Plead, usually 

 near the shore of Georgian Bay, but at some places some 

 one-half mile inland. Eastward from Inglis Falls it runs 

 inland and ends about six miles northeast of Woodford. 



Along this ridge, with occasional interruptions of sev- 

 eral miles, grows Scolopendrium vulgare. It also occurs 

 on out-crops on either side of this ridge. It is most 

 abundant on the top of the ridge north of Woodford at 

 Woodford, at Inglis Falls, north of Kemble. and on the 

 eastern slope of McLean's Mountain. Its favorite 

 habitat is the edge of deep clefts in limestone ridges in 

 heavy shade. It also grows in crevices in mossy rocks in 

 heavv shade. While it never grows in very dry situa- 



