THE 



CANADIAN NATURALIST 



AND 



THE INTRODUCED AND THE SPREADING PLANTS 

 OP ONTARIO AND QUEBEC. 



By A. T. DrumjiOxND, B.A., LL.B. 



Those members of our flora which have been introduced, or 

 which have the habits of naturalized species, we may refer to one 

 or other of five groups : — 

 I. Incidental escapes. 

 II. Adventive plants. 



III. Naturalized foreign plants. 



IV. Species which are both indigenous and naturalized. 



V. Native species which have the habits of introduced plants. 



The first, second, and third groups are well known, and only 

 require a passing notice. 



The first group embraces species which have escaped from 

 cultivated grounds, have propagated themselves in neglected 

 gardens, or have been casually introduced with grain or grass- 

 seed, or in other ways, and which are not in the least permanent. 

 Stray plants of wheat, oats, corn, and other grains growing 

 upon our country roadsides, and upon the tracks of the railways, 

 are familiar to us. The little heartsease, the ragged robin, and 

 morning glory are some of our garden plants, which, unaided 

 by continued cultivation, have occasionally, for a brief period, 

 struggled to retain their places in the neglected flower plots. 



The term adventive has been applied to foreign plants which 

 have permanently located themselves in the country, and jet are 

 so dependent upon some of the accompaniments of civilization 

 TOL IV. Z No. 4. 



