226 BULLETIN 7*72, U. S. DEPARTMENT OF AGRICULTURE. 
nyni), P, virgatum, P. paniculatum, and P. distichum. The first is selected as 
the type. All are still retained in the genus. 
Fig. 136. — Reimarochloa oUgostachya. 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. condida Humb. and Bonpl., R. elegans, and R. acuta. The first two are 
