60 



ROOT DEVELOPMENT IN THE GRASSLAND FORMATION. 



first 1.5 feet of soil especially, great numbers of lateral roots arise. These vary- 

 in size from mere threads to those^over 2 mm. in diameter. In this soil 

 stratum a single tap-root often has 8 to 10 of the larger laterals, besides 

 great numbers of i smaller^ones_ il (fig.223). All are profusely branched with 



Fig. 24. — Underground portion of Anogra cinerea. 



