382 THE CANADIAN NATURALIST. [DeC. 



Xanthium strumarium, L., occurs in the Erie district, and 

 thence eastward. Some forms of this species are indigenous in 

 the United States — (Gray's Manual.) 



GnaphaUum uliginosum, L. Most of the species of the genus 

 Gnaphalium have a more or less introduced-like habit. Indi- 

 viduals of this species are frequently met with on roadsides and 

 in fields. The range of the plant extends over the two Provinces, 

 except in the extreme West, where, however, it is to be looked 

 for. 



Artemisia vulgaris, L., is a common roadside plant in eastern 

 Ontario and Quebec. Torrey and Gray (Flora N. Amer.) refer 

 to it as indigenous in British North America. It occurs within 

 the Arctic zone. 



Cirsium arverise, Scop. In the settled districts 0. arvense is 

 decidedly naturalized, but some authors regard it as probably 

 indigenous in the Hudson's Bay Territory. It is well diffused 

 throughout Ontario and Quebec. 



Plantago major, L., is very common everywhere amongst 

 grass in fields and on roadsides. Agassiz thinks it indigenous 

 on the north shore of Lake Superior, and Macoun has informed 

 me of its occurrence, in the native state, on rocks along rivers in 

 the northern part of the County of Peterborough, Ontario. 



Veronica serpyllifolia, L., is a familiar field and wayside 

 plant from the Detroit River to Gaspe and Newfoundland. Its 

 habits are those of an introduced plant, but some observers have 

 met with it in the native state. 



Brunella vulgaris, L., is well distributed over the two Pro- 

 vinces. The naturalized state occurs abundantly in lawns and in 

 pastures, and sometimes on roadsides. 



Calamintha dinopodmm, Benth., is well known throughout 

 Ontario, but in Quebec does not seem to have been observed. At 

 Kingston I think it is indigenous, and Macoun similarly regards 

 the Belleville plant. The Lake Superior form Agassiz also con- 

 siders native rather than naturalized. 



Polygonum aviculare, L. This, the most common of weeds, 

 almost everywhere meets the eye. I have only seen the intro- 

 duced form, and have doubts whether it is, at any locality, indi- 

 genous. The variety erectmn (P. erectum, L.) is an aboriginal, 

 as also is var. littorale (P. maritimum, Ray.) 



Hamulus Lvpulus, L., has escaped from cultivation, and some- 

 what permanently settled in some places. I have seen it around 



