108 
ga: W 
Fig. 404. CENCHRUS GRA Nash, Bul. Torr. ser sende | 
1895. SLENDER SAND-BUR.—An ascending, sparingly b “es 352 
2 yfi 
(1”) wide, scabrous on the midvein and m Invo x cli 
with eee slender, usually purplish | spines. spi A ad 
(4% lo: lo: ng, exse : 
pine lands, Pod re April to ee tribuloides tI 
This species is readily distinguished from C. echinatus and ©. tte n 
long, slender, usually purple spines, were involucres, an 
leaves. 
