WEED MIGRATION 



765 



SOLANACEAE, POTATO FAMILY. 



Horse Nettle (Solanum carolinense). 



This weed is a most troublesome species in southern Iowa. It 

 was reported in the southeastern part of the state as early as 

 1876 and has gradually moved northward until at present it 

 is well scattered over the state. In Nebraska, Aughey had found 

 it in 1875, and it was reported in Weeping Water by T. A. Will- 

 iams in 1889 ; in Illinois it had been known for half a century near 

 Peoria (Brendel) ; Port Byron, 1894 (Pammel) ; South Chicago 

 (Higbee and Kaddin) ; Delaware, Newcastle county, 1860 (Tat- 

 nall) ; Pennsylvania, 1823 (Humphrey Marshall and Beck) ; West- 

 chester, 1853 (Darlington) ; New Jersey, 1887 (Halsted and Brit- 

 ton) ; New York, 1888; Buffalo, 1864 (Clinton); Cincinnati, 



Fig. 567. Horse Nettle {Solanum carolinense). Originally a weed of the 



southern states ; rapidly spreading northward, a, general aspect of plant ; 

 b, flower ; d, seeds ; c, seed enlarged. 



(After Dewey, U. S. Dept, Agr.) 



