2 Farmers' Bulletin 1126.

conditions, such as obtain along the Gulf coast and in southern California, have plants lived over winter. This grass is very closely related to the cultivated sorghums and hybridizes with them readily. The fact that it has no rootstocks places it nearer- the cultivated sorghums than Johnson grass, though for many years Johnson grass FIG. 1.- -Single plant oí Sudan grass, illustrating its habits of growth when planted in rows.

has been credited by some botanists with being the primitive form of tbe sorghums.

Sudan grass when seeded broadcast or in drills grows about 3 to 5 feet high and has stems about three-sixteenths of an inch in diameter (a little smaller than a lead pencil). If grown in rows and cultivated, it reaches a height of 6 to 8 feet, and the stems are about one-