47. 



NIGHTSHADE FAMILY ( Solanctceae. ) 



This family contains a number of very troublesome and per- 

 nicious weeds, among them the common black nightshade (Sola- 

 num nigrum] with small white flowers, the Buffalo bur (S. ros- 

 tratum) with prickly stems and fruit and yellow flowers, leav.es 

 resembling those of the water melon; the ground cherry (Phy- 

 salis), the Jimson weed, two types, both species poisonous. Of 

 the cultivated plants it contains the potato, tomato and tobacco. 



Burdock (Arctium 

 gardens and pastures. 



Lappa). A common biennial weed 

 (Divi 



waste places, 



ision of Bot., U. S. Dept. Agr.) 



HORSE NETTLE (Solanum carolmense L.) 

 Horse nettle is a deep-rooting perennial, propagating freely 

 by its underground roots, these running roots are often three 

 feet long; stem from one to two feet high, somewhat straggling, 

 half shrubby at the base ; stem hairy or merely roughish with 

 minute hairs which are star-shaped, also armed with stout subu- 



