574 POACE.E. 



culm 2-3, rigid, 1-0 cm. long. Pauiclo exsertcfl, linoar, oval or 

 pyrainidul, 0-10 cm. long, rays in hiilf-whorls of 4-9, the longest 

 2-4 «;m. long, and Howcr- bearing above tlic middle. Si)ikolet8 

 tinged with red, linear, t.*-4 -flowerod, joint of racliilla 1 nun. 

 long; empty glumes keeled, acute, 1 -nerved, tirst l-'2 mm., secuiid 

 2-3 mm. long; floral glume oval, abruptly jwinted, ".'.i-I'.'J nun. 

 long; palea linear, oiliohite or soabrid on the keels, as long or nearly 

 as long as its glume. 



Nearly allied to A. ((it(fan,s, and perhaps it should be included 

 in that species. 



Oregon (alkali flats). IfunrU; California, Lennnon. 



Alkaline soils, Nevada, Oregon, and California. 



4. A. Suksdorfii (Vasey) Pcxt Siihdnrfii \'iisey ined. 



A densely tufted liglit-coloretl grass, lo-l') i-m. long; no root- 

 stociks. Ligule truncate, decurrcnt, '2 nun. long; blades of sterile 

 shoots rigid, recurved, conduplicate, ])ung('nt-i)()iiited, 5-Tcin. long, 

 those of the culm erect and shorter. Panicjlc narrow, simple, spike- 

 like, purplish, 2-5 cm. long. Spikolets linear-lanceolate, l-o- 

 flowered, 4-0 mm. long; empty glumes linear-laiu-eolate, fii'st .'?- 

 (rarely 1) lUM-ved, 3-4 mm. long; second a little longer; floral 

 glume chartaceous, ovate when s[>read, 3.2-4."^ mm. long; luilea 

 ciliate on tlie keels. 



Washington, iSuhyilorf IIU. 



Gravelly jdaces near glaciei-s. Se|)teinbei\ 



5. A. pulchella (\^asey). Poa pulchella N'asey, Coult. Bot. Oaz. 

 7:32(1882). 



Densely tufted, the decumbent base from much-branched root- 

 stocks; culms slender, smooth, erect, 10-20 cm. high. Leaves of 

 sterile shoots numerous, blades conduplicate, abruptly pointed, 2-4 

 cm. long, less than 1 mm. wide when spread, those of the culm 

 1-2 in number, 1-2 cm. long; ligule 2-3 cm. long. Panicle ovoid 

 or pyramidal, 2-4 cm. long, with rays mostly in pairs, smooth, eacli 

 bearing a single spikelet. Spikelets pur])lisb, oval or linear, 3-5- 

 flowered, 0-8 mm. long, joint of rachilla scabrid, 1.2 mm. long; 

 empty glumes obtuse or acute, often erosely denticulate, broadly 

 gcarious-margined, first ovate-lauceohite, l-n(^rved, second oval-Ian- 



