A(JUOSTIl)E.E. 835 



In swamps, Massachusetts to Texas; also iu California. 



)IG. A. Hallii Vasey, Contrib. U. S. Nat. Herb. 3: 7-4 (1803). 



Perennial; culms slender, erect, (lO-SCt cm. lii<fli. Sheaths 

 scabrid, a little shorter than the internodes; upper ligule acute, 

 5-7 mm. long, tiie lower ones shorter; blades flat, scabrous 

 above, I'l-^O cm. long, 3-5 mm. wide. Panicle exsertcd, whitisii, 

 green or brown, linear, thin, 10-18 cm. long, the rays capillary in 

 half-whorls of 5-20, some of the longest 5-T cm. long, branching 

 and flower-bearing above the middle. Spikelets lanceolate, 3— 4 mm. 

 long; empty glumes thin, the keels toothed, first glume scarcely 

 longer than the second floral glume, about 2.4 mm. long, the hairs 

 at the base about 1.5 mm. long, awnless, obtuse, toothed, minutely 

 scabrid, 5-nerved, the central one not always extending to the tip; 

 pa lea 0. 



Southern Oregon, Hentlerson 1G08; California, Priiujle in 

 1S82. 



or. (135). Gastridium lieauv. Agrost. 21, t. 0./. G (1812). 



Spikelets 1 -flowered in a close tai)ering spikelike panicle; rachilla 

 articulate above the persistent lower glumes and produced beyond 

 the perfect flower as a short bristle. Einjity glumes very acute, the 

 base shining, enlarged, ventricose, concave below, keeled above, 

 first glume longer than the second; floret about one-fourth as long 

 as the second glume, having a tuft of very minute hairs at the 

 base, also hairy on the back, apex truncate-dentate, usually with 

 a sleiuier twisted awn on the back below the apex exceeding the 

 spikelet; palea as long as its glume. Stamens 3. Styles short, 

 distinct. Grain subglobose included, but not adherent. 



Tufted annuals with flat leaf -blades. Si)ike exsertcd. 



]Jy some authors this genus has been included with Agrostis. 

 The older authors included it iu Milium on account of the hardness 

 in the glume. 



There are 2 species from the !^^editerranean region, one of which 

 is also found in tropical Africa and in South America. 



1. G. AUSTRALE Beauv. 1. c. XiT-GRASs. G. lendigerum Gaud. 

 Fl. llelv. 1:176 (1828). G. Jaxum Boiss. & Rent. Pugill. PL 

 Nov. 126. G. vestitum Spreng. Neue Entdeck. 2:36 (1793). 



