110 



Fig. 406. Cenchrus macrocephalus Scribn. new uamo. (C 

 iribuloidea macrocephalus Doell, Flor. Bras., 2 : part 2, 312. 1877, 

 ex cliar.) Lahge Sand-hur. A coarse, nuicli branched and leafy 

 annual, witli prostrate or ascending culms 3 to G dm. long, ami 

 dense spikes 2 to 8 cm. long. Involucres or "burs" ((/) jiubescent, 

 about 8 nun. long and 6 mm. broad, with numerous stout spines. 

 Sands along the coast, New Jersey and southward ( ?), Xew (Orleans. 



Burs about twice the size of those of Cenchrus iribuloides. 



