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. 
Fic. 186.—Reimarochloa oligostachya. Plant xX 4; two views of spikelet and fertile 
floret, x 10. 
Ceresia Pers., Syn. Pl. 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 Humb. and Bonpl., R. elegans, and R. acuta. The first two are 
