Siuhin Grctss.

latecl to the cultivated sorghums and hybridizes with them readily. The fact that it has no rootstocks places it nearer the cultivated sor-

FlG. 2.—Young plants of Sudan gras« (left) and Jolmson grass (right), showing the

vigorous rootstocks of Jolmson grass and their entire absence on Sudan grass.

«dnims than Johnson grass, though for many years Johnson o;rass has been credited by some botanists with being the primitive form of the sorghums.