462 



THE SMALL GRAINS 



with basal lobes pointed and projecting, smaller than those of hedge 

 bindweed; flowers funnelform, white, or tinged with red, not nearly 

 so large as those of hedge bindweed ; bracts surrounding base of the 

 flower small. The trailing bindweed is much like the hedge bind- 

 weed, but the stems are trailing and the stems and leaves more or 

 less downy. The California bindweed has stems 1 to 15 inches long, 



FiG. 145. The hedge bindweed, showing its extensive formation of 

 underground stems. 



either short and erect or long and trailing ; leaves oval to triangular, 

 1 inch long ; flowers about the same size and shape as those of hedge 

 bindweed, white or creamy, purplish outside; bracts of medium 

 size ; seeds | inch long, dark brown, pear-shaped, one face convex, 

 the other bluntly angled with flat sides; surface roughened with 

 small tubercles, basal scar a roughly lined reddish depression at the 

 lower point end. Seeds of field bindweed are shown in Fig. 142 d. 



There are two different methods of underground prop- 

 agation of the bindweed. In one method, represented 



