178 WEEDS AND USEFUL PLANTS. 
Obs. Tnis worthless weed occurs in most cultivated grounds,—and 
usually very abundant — pt stubble, after a crop of wheat : ae 
if the land be good, the plant seems te be smothered or choked out, the 
the crop of a ver and timot It is always ready, 
e rse_ weed to 1 its 
is frequently. met w 
9. XAN’THIUM, Tournef. Crot-Bur. 
(Greek, Yanthos, yellow ; a color said to be produced by the plant.] 
Heads moneecious, in spicate clusters—the sterile spikes at the summit. 
——————————— 
Fic. 119. Flowering summit of the Cockle-bur (Xanthium strumarium), with heads 0 
staminate flowers above, the pistillate ones below. 120, A pote ga pte Bk flower very 
much enlarged. 121. A head of (2) pistillate flowers enclosed in the prickly involucre. — 
‘ 
