326 POACE.E. 



purple, 10-15 cm. long, 1-1.5 cm. broad; rays rough, perhaps 40 

 at a node, most of them short and flower-bearing to the base. 

 Spikelets acute, scabrous, 3-3 mm. long, terminated in addition by 

 a bristle often 1 mm. long; floral glume 1.5-1.7 mm. long, awn 

 below the aj^ex and extending beyond its glume 2-4 mm., glume 

 rather firm, brittle truncate, toothed, minutely hairy on the back, 

 obscurely 5 -nerved below; palea or present. 



Oregon, California, Nevada. 



Var. major Yasey, Contrib. U. S. Nat. Herb. 3:72 (1892). 

 Agrostis exarata microjjliyUa S. Wats. 



Culms 30-75 cm. high; blades larger; panicle 20-30 cm. long, more 

 loosely branched, some rays 8 mm. long. The same range as the 

 species. 



9. A. geminata Trin. Unifl. 207 (1824). 



A tufted erect perennial, 15-40 cm. high, Ligule 2 mm. long; 

 blades of sterile shoots slightly scabrid, mostly involute, 10-20 cm. 

 long, 1-2 mm. wide, the upper node near the middle of the culm, 

 exclusive of the panicle. Panicle exserted, purple, narrow or 

 spreading, 8-10 cm. long; rays capillary, scabrous, in half- whorls 

 of 4-6, some of the longest 6 cm. long, branching above the middle, 

 flower-bearing at and near the ends. Spikelets 2,5-3 mm. long, 

 scabrous on the keels; first glume a little longer, awn usually pro- 

 jecting slightly; floral glume 1.6 mm. long, broad, thin, obtuse, 

 toothed, 5-nerved below, the awn attached near the middle; palea 

 minute. 



Alaska, Harnngfon in 1871-2, Dr. Kellogg 119. 



Plants from British Columbia by Macoun are awnless. 



Alaska to Oregon, 



10, A. densiflora Vasey, Contrib. U. S. Nat. Herb. 3:72 

 (1892). A. vuirronata Thurb., not Presl. 



An erect tufted rather stout annual, 7-22 cm. high. Sheaths 

 smooth, crowded at the base, rather loose, longer than the inter- 

 nodes; ligule decurrent, obtuse, about 3 mm. long; blades usually 

 flat, erect, with scabrous margins, 2-6 cm. long, 2-3 mm. wide. 

 Panicle dense, exserted, erect, 2-5 cm. long, 3-12 mm. broad, rays 

 scabrous, appressed, 3-5 in each half-wliorl. Spikelets very pale. 



