Fig. 406. Cenchrus niacrocephalus Scribii. new name. (C. 

 tribuloidcs macroccpltulus Doell, J'lor. Ih'as.. 2 : i)art 2, 312. 1877. 

 ex char.) Lakge Sand-buh.— A coarse, mncli branclied and leafy 

 aimnal, witli prostrate or ascending culms 3 to 6 dm. long, and 

 dense spikes 2 to 8 cm. long. Involiicros or "burs" (a) jiubesceut, 

 about 8 mm. long and G lum. broad, with numerous stout spines. — 

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



I3ur.s about twice the size of tiiosc of Cenchrus iribitloides. 



