226 BULLETIN 772, U. S. DEPARTMENT OF AGRICULTURE. 



nym), P. virgatum, P. paniculatum, and P. distichum. The first is selected as 

 the type. All are still retained in the genus. 



FIG. 136. Reimarochloa oligostachya. Plant X I ; two views of spikelet and fertile 



floret, X 10. 



Ceresia Pers., Syn. PI. 1 : 85. 1805. A single species, C. elegans Pers., is 

 included. This is one of the species having a broad-winged rachis. 



Reimaria Fliigge, Gram. Monogr. 213. 1810. Three species are included, 

 R. Candida Humh. and Bonpl., .R. elepans, and R. acuta* The first two are 



