ANDROPOGONEA 173 
to be of value as a forage crop in the southern states. 
Tunis-grass, resembling Sudan-grass, is another variety 
of the sorghum. (See, ““SSome New Grasses for the South,” 
Yearbook U. 8. Dept. Agr. 1912.) 
Sorghastrum nutans (L.) Nash, a species of a related 
genus, is a common constituent of native meadows over 
the same region that Andropogon furcatus is found. It is 
a tall slender perennial with bronze-colored panicles with 
brilliant yellow anthers. 
Tripe III. NAZIE (ZOYSIE) 
212. This is an unimportant tribe of about a dozen 
small genera. The spikelets are similar to those of Andro- 
pogonez but having membranaceous awnless instead of 
hyaline usually awned lemmas, are single or in groups and 
fall entire from the continuous rachis. In the genera found 
in the United States the spikelets are in groups. 
Key To GENERA OF NAZIEX 
A. Second glume beset with hooked spines....... Nazi. 
AA. Second glume without hooked spines. 
B. Groups of spikelets spreading or drooping 
along one side of the main axis...........ASGOPOGON. 
BB. Groups of spikelets erect, not secund. 
Bo Paints SOME oo dg SE kde x's HILARIA. 
cc. Plants not stoloniferous................. PLEURAPHIS. * 
The most important genus is Hilaria, with the species 
H. cenchroides H.B.K. (Fig. 18), curly mesquite. This 
grass is common on the uplands of Texas and Mexico 
where it is an important range-grass. It resembles buf- 
falo-grass in being short, in producing stolons and in 
forming a sod, and by stockmen is often confused with 
that grass. In curly mesquite, the spikelets are in clus- 
ters of 3, the groups borne on the upright axis forming 
