8 BULLETIN 981, U. S. DEPARTMENT OF AGRICULTURE. 
per acre.” Tests at the field stations at Chillicothe and Amarillo, 
Tex., have always shown that Sudan grass is superior to Tunis grass 
in those localities. 
Tunis grass seems best adapted to a region where the period of 
heaviest rainfall coincides with that of the higher temperatures. It 
is possible that it might have some value in a locality having wet 
and dry seasons. If the temperatures were high enough during the 
wet part of the year Tunis grass might make a good pasture grass 
and reseed itself indefinitely. 
Tunis grass crosses freely with the sorghums, and some of these 
natural crosses appear more valuable than the pure strain. This 
Fic. 5.—Tunis grass grown in rows 40 inches apart at the Arlington Experimental Farm, Va. Photo- 
graphed August 26, 1915. 
grass apparently has only two points of superiority over Sudan grass; 
it is a few days earlier in reaching maturity and is less subject to 
the attacks of red-spot, or sorghum blight. These two characters 
if they are transmitted to the hybrids with sorghum may give to 
such hybrids a superiority over the Sudan-sorghum crosses. 
KAMERUN GRASS. 
The first introduction into the United States of Kamerun grass 
(Andropogon sorghum effusus Hackel) was S. P. I. No. 38005, re- 
ceived April 13, 1914. This was obtained by P. H. Dorsett, near 
Bahia, Brazil, in which country it is rather widely distributed. A 
second shipment of seed, S. P. I. No. 38670, was received on July 
1, 1914, from Dr. T. A. Argolla Ferrao, Bahia, Brazil. In Brazil 
