146 THE TRUE GRASSES. 



cms as a whole ; middle spikelet 2-4-flowered, the lateral 

 1-2-flowered. 



Species two, one (C. prostratum Presl), in Mexico, and 

 one (C. ereetum Vasey & Hack.) in Texas and Sonora. 



201. (196) Pommereulla L. fil. Spikelets sub-turbinate, 

 in a dense spike, sheathed at the base. Flowering 

 glumes finally indurated and with a pointed callus. A 

 small, annual grass. 



Species one (P. Cornucopia L. fil.), in the East Indian 

 Peninsula. 



202. (204) Scleropogon Philippi (Lesourdia Fourn.). 

 Inflorescence an almost spike-like panicle at whose apex 

 there is, in the ? plant, a tuft of sterile spikelets (each 

 reduced to a single glume) ; $ plant with awnless or 

 shortly three-toothed flowering glumes. 



Species three (?), one in Chili which, together with 

 one or two others, extends into Mexico and Texas. 



203. (206) Triraphis Brown. Panicle narrow, elon- 

 gated, with upright many-flowered spikelets ; flowering 

 glumes sometimes with membranaceous marginal lobes. 

 Grasses with narrow or rush-like leaves. 



Species five in Australia, one in South Africa. 



SUB-TRIBE B. Seslerieee. 



Flowering glumes 1-5-awned, lobed, or awuless ; style and stigma 

 usually long, the latter narrow, protruding near the apex of the flow- 

 ering glume. 



204. (213) Monanthochloe Engelmann (HdocUoa 

 Griseb.). A creeping grass of the sea-coast and alkaline 

 plains, with crowded, short, convolute leaves and nearly 

 concealed spikelets. 



Species one (M. littoralis), from Florida to California, 

 and represented by a variety in the Argentine Bepiiblic. 



205. (214) Munroa Torrey. Low grasses of the ele- 

 vated plains. Branches much forked or fasciculate ; 

 leaves cuspidate-pointed, in clusters at the ends of the 

 branches ; spikelets nearly concealed by the upper leaves. 



Species three, one (M. squarrosa Torr.) on the pla- 

 teaux of the "Western United States and the Argentine 

 Republic, two in extra-tropical South America. 



