2o8 Weeds. 



vines. They form a network in the soil, 

 and also go down deeply into it. 



Bindweed begins to grow usually in the 

 month of May, and maintains its greenness 

 until the time of early frost, although its 

 growth is most vigorous during the early 

 months of summer. It commences to blos- 

 som early in the season, and continues to 

 bloom for a long time. Bindweed grows in 

 various crops, but it is most troublesome in 

 grain crops; yet when it is found in hoed 

 crops, it greatly adds to the trouble of keep- 

 ing them clean. It climbs up the stalks of 

 the grain amid 'which it grows, and, after 

 twining around them, it gradually draws 

 them down toward the ground. So com- 

 pletely intertwined antl entangled are the 

 vines within themselves that^ they some- 

 times greatly hinder the progress of the 

 mower or binder. This weed will grow in 

 various soils, but is most at home in soils 

 which contain a large amount of humus. 



Bindweed is generally distributed by 

 means of the seeds of cereal grains, but it 

 is also carried from place to place by the 

 agency of water. In this last fact lies one 

 explanation of the extent to which it is 

 sometimes found in bottom lands. It is 



