DESCRIPTIONS OF TRIBES AND GENERA. 159 



long time by the spiral styles and stigmas which are in- 

 terlaced above. 



SUB-TRIBE G. Eufestuceae. 



Without the special characteristics of the preceding sub-tribes. 

 Flowering glumes five- to many-nerved. 



243. (244) Pleuropogon Brown (Lophochlcena Nees). 

 Spikelets rather large in a simple, loose raceme, 8-14- 

 flowered ; flowering glumes 7-nerved, mucronate-pointed 

 or awned. 



Species three, one (P. Sabini Brown) arctic-circum- 

 polar, and two in California. 



244. (245) Brylkinia F. Schmidt. Inflorescence like 

 the preceding; spikelets pendent, one-flowered with 

 four empty glumes ; flowering glumes long-awned. A 

 weak, broad-leaved grass. 



Species one (B. cavdata F. Schm.), in Japan and 

 Saghalin. 



245. (246) TJniola L. (Trisiola Eafin., Chasmanthium 

 Link). Panicles usually loose, often showy; spikelets 

 laterally compressed, broad, with 3-20 flowering glumes 

 and 3-6 empty glumes. Flowering glumes chartaceous 

 or coriaceous, with many delicate nerves. 



Species five, mostly in North America ; one in Central 

 America; one in the Andes and extra-tropical South 

 America. U. latifolia L. (Fig. 82), with broad leaves 

 and elegant nodding spikelets, is a favorite ornamental 

 grass. 



246. (247) Distichlis Kafinesque. Spikelets 8-16- 

 flowered; the $ with a continuous and the ? with an 

 articulated rachis, oblong compressed ; glumes and 

 palese keeled, coriaceous ; flowering glumes many-nerved, 

 acute, awnless, closely two-ranked. Creeping grasses 

 with rigid, densely two-ranked, involute leaves. 



Species four, along the seacoast and on alkaline 

 plains in the interior throughout America, one of which, 

 D. maritima, occurs also in Australia. 



247. (253) Briza L. (Fig. 83). Spikelets many -flowered, 

 panicled, broad ; glumes thin-membranaceous, very con- 

 cave, densely crowded, five- to many-nerved ; palesemuch 



