82 



WEEDS OF THE FARM AND GARDEN 



Erigeron canadensis, the common horseweed. The 

 Oenothera biennis became a settler of Padua, Italy, in 

 1812; the Erigeron canadensis near Paris in 1835. Our 

 common rice cut grass (Leersia orysoides), according to 

 Buchenau, made its appearance in Italy many years ago. 

 The chicory was introduced near Dorchester, Mass., 

 in 1875, an d since then has spread chiefly through the 

 northern states. The ox-eye daisy was carried to Rhode 

 Island about 1815, and since then has spread throughout 



Fig. 34. Distribution of some weeds, quack grass, etc. (C. M. 

 King.) 



the northern states. Purslane was cultivated as early as 

 1672 in Massachusetts, and since then has spread to all 

 portions of the United States. Were it not for some of 

 these records it would be quite impossible to say whether 

 a plant was indigenous or native. We have better rec- 

 ords of the appearance of later introductions, like the 

 golden hawkweed, first found in the eastern states, where 

 it has become a troublesome weed and occasionally found 

 now in the western states, even in Iowa. While some 



