AUKOS'l'lDIvK. 329 



An erect i^erennial, 30-75 cm. high, from nimiinf? rootstock-^. 

 Sheaths smooth, longer tlum the internodes; ligiile ohtuse, 2 mm. 

 long; blades 7-10 cm. long, the upper much shorter, flat or invo- 

 lute, 3 mm. wide. Panicle exserted, lanceolate, 7-12 cm. long; 

 longest rays 3 cm. long, bearing a few spikelets above the middle. 

 Spikelets 2 mm. long, very pale or tinged with purple; empty 

 glumes acute, the lower a little the longer, 2.5-3 mm. Ion"-; floral 

 glun>e a little shorter, 5-nerved, truncate, sometimes bearing a 

 slender awn ; palea or very minute. Xot seen by me. 



(Jalilbrnia, Bohnider, Lemmon. 



Alaska to California. 



IT). A. ffiquivalvis Trin. Fund. Agrost. 2:116 (1841). A. 

 mnimt var. wf/uit'ah'is Trin. Bong. Fl. Sitch. Act, Petrop. 171 

 <1832). 



A slender tufted pale green perennial, 20-60 cm. high, smooth 

 or nearly smooth throughout. Sheaths shorter than the internodes; 

 ligule 0.5-2 mm. long; blades flat, S-15 cm. long, 2-3 mm. wide, 

 the upjier 1-2 cm. long. J»anielo thin, smooth, very narrow. 5-15 

 cm. long, rays in distant half-whorls of 2-5 or those above solitary, 

 3-5 cm. long, mostly flower-bearing above the middle. Spikelets 

 usually in pairs, reddish purple to i)ale greon, about 1.7 mm. long, 

 empty glumes and floral glume extending to the same hei"-ht; 

 emniy glunu's oblong when spread, acute, flrst 1-nerved, second 

 dt aU'ly 3-norved; floral glume broad-oval, toothed at the apex, 

 5-!icrved, with a minute hairy callus at the base; palea three- 

 fourths as long as its glume. 



Washington. T. S. Ihpl. A(jricuL 383, from SiiL-xdorf 'dm\ E. C. 

 Smith. 



Alaska to California. 



16. A. yerticillata Vill. Prosp. 16 (1785), or Fl. Delph. 16 

 (1785). 



Culms decumbent ami rooting at the lowest nodes, 30-60 cm. 

 high, nodes sometinjos 8-10 in number. Sheaths smooth, loose, 

 nearly as long as the internodes; ligule truncate, decumbent, 2-3 

 mm. long; blades scabrous or very rough, especially above on the 

 maigins, flat or Anally involute, 2-5-8 cm. long, 2-4 mm. wide. 



