AGKOSTIDE.E. 329 



An erect perennial, 30-75 cm. high, from running rootstocks. 

 Sheaths smootli, longer than the internodes; ligule ohtuse, 2 mm. 

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

 lute, 3 mm. wide. Panicle exserted, lanceolate, 7-13 cm. long; 

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

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

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

 glume a little shorter, 5-nerved, truncate, sometimes bearing a 

 slender awn ; palea or very minute. Not seen by me. 



California, Bohinder, Lemmon. 



Alaska to California. 



15. A. sequivalvis Trin. Fund. Agrost. 2: IIG (1841). A. 

 canina var. cequivalvis Trin. Bong. Fl. Sitch. Act. Petrop. 171 

 (1832). 



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

 or nearly smooth throughout. Sheaths shorter than the internodes; 

 ligule 0.5-2 mm. long; blades flat, 8-15 cm. long, 2-3 mm. wide, 

 the upper 1-2 cm. long. Panicle thin, smooth, very narrow, 5-15 

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

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

 usually in pairs, reddish purple to pale green, about 1.7 mm. long, 

 empty glumes and floral glume extending to the same height; 

 empty glumes oblong when spread, acute, first 1-nerved, second 

 delicately 3-nerved; floral glume broad-oval, toothed at the apex, 

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

 fourths as long as its glume. 



Washington, U. S. Depl. Agricul. 383, from Si(k,sdorf and E. C. 



Alaska to California. 



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

 (1785). 



Culms decumbent and rooting at tlie lowest nodes, 30-00 cm. 

 high, nodes sometimes 8-10 in number. Sheaths smootli, loose, 

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

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

 margins, flat or finally involute, 2-5-8 cm. long, 2-4 mm. wide. 



