150 Plants of Europe naturalized in the United States. 



1. Plants which have become more or less generally natural- 

 ized in the United States. 



1. Introduced by cultivation, for agricultural or other purposes. 



1* Veronica officinalis. 

 2 Phleum pratense. 



Not in the southern states. Widely spread 

 in advance of cultivation, in soils pecu- 

 liarly adapted. Very common in the 

 western country, and common every- 

 where. 



3 Anthoxanihum odoratum. Common every where- 



4 Agrostis alba. Common. 



5 Agrostis vulgaris. Common in the northern states. 



6 Poa pratensis. . Common every where. 



7 Holcus lanatus. Do. 



8* Plantago major. No part known to me where it is not. 

 9* Cynoglossum officinale. Spread so generally in the western coun- 

 try that it seems native. 

 10* Verhascum Thapsus. Much more frequent every where than in 



Europe. 

 11* Verbascum blattaria. Do. do. perhaps native. 



12* Datura Stramonium. Generally disseminated, even in forests, but 

 purposely planted about camping places in the first instance. 



13 Daucus Carota. Both southwardly and northwardly. 



14 Pastinaca sativa. Far the most generally spread umbelliferous 



plant ; more so than any native. 



15 Rumex crispus, I ^^^^^ ^^^^^^ ^^ advance of cultivation. 



16 Rumex ohtusifolius, J 



17* Scleranthus annuus. Not in the southern states. 



18* Stellaria (Alsine) media. This, at least in Carolina, was inten- 

 tionally introduced, as food for Canary birds; and spread, in 



,i ,:,; ten years, upwards of fifty miles. 



19* Rosa rubiginosa. Every where about cultivated farms. 



20* Chelidonium majus. Every where in immense plenty. 



21* Nepeta cataria. Every where do. 



22* Marrubium vulgare. Do. In some localities this is not seen. 



23* Barbarea vulgaris. Very general, but not in quantities. 



24* Sinapis nigra. Every where, especially westward. 



25* Trifolium repens. Do. do. 



26 Trifolium pratense Do. do. 



27* Leontodon taraxacum. Spread to an incredible extent, and preced- 

 ing cultivation. 



