SOLANACEAE (NIGHTSHADE FAMILY) 367 
means early, deep, and frequent cutting with hoe or spud; salt on 
the cut surfaces will retard new growth and will also induce stock to 
bite off young shoots. In order to destroy the rootstocks short 
rotations are necessary, alternating cultivated crops, to which 
are given such thorough tillage that no green leaves are allowed 
to appear on the weeds, with such crops as rye, clover, and vetch, 
which will choke and smother the Nettle, supply late pasturage, 
and then be plowed under to furnish humus for another cultivated 
crop, well tilled. Two or three seasons of continuous effort are 
required in order to suppress the weed, but the labor is well repaid 
by the deliverance of the soil from such a pest. 
WHITE HORSE NETTLE 
Solanum eleagnifolium, Cav. 
Other English names: Prickly Nightshade, Silver-leaved Nightshade, 
Blue-top, Trompillo. 
Native. Perennial. Propagates by seeds and by rootstocks. 
Time of bloom: May to September. 
Seed-time: July to November. 
Range: Missouri and Kansas_to 
Texas and Arizona. 
Habitat: Plains and prairies; 
meadows, pastures, cultivated 
grounds ; invades all crops. 
Stems one to three feet high, 
slender, branching, — silver-white 
with a dense, scurf-like covering of 
fine, many-rayed hairs, and beset 
with slender, very sharp prickles, 
or these are often lacking. Leaves 
oblong to lance-shaped, obtuse, 
wavy-edged or entire, covered with 
fine, star-shaped, white hairs, and 
narrowed abruptly at the base to 
short, prickly petioles. Flowers in 
cymose clusters, appearing terminal 
but soon becoming lateral, between 4,, 956.— white Horse Nettle 
the leaf axils; corolla violet or light (Solanum elwagnifolium). x 4. 
