STANDLEY — FLORA OF GLACIER PARK. 287 



14. KOELERIA Pers. 



1. Eoeleria cristata (L.) Pers. Junegrass. Common at low and middle altitudes, 

 chiefly on open slopes. B. C. to Calif., Tex., and 111.; also in Eur. and Asia. {K. 

 gracilis Pers.) — An erect perennial bunchgi'ass, 25 to 40 cm. tall; leaves mostly 

 confined to the lower half of the slender simple culms, the blades narrow, mostly 

 flat; panicle 5 to 10 cm. long, dense, spikelike, shining. 



This grass resembles species of Poa, even to having blades boat-shaped at the tip 

 as in that genus. It may be distinguished by the sharp-pointed, indistinctly nerved 

 lemmas and the shining white hyaline paleas. An important forage grass. 



15. AVENA L. 



1. Avena sativa L. Oats. Scattered plants in waste ground and along the railroad 

 at Belton and east entrance. Native of the Old World; widely cultivated and often 

 escaping. — The cultivated oat, readily recognized by its open panicle of large V-shaped 

 drooping spikelets, comes up where stock has been fed. Under cultivation the awns 

 are much reduced, but they are usually well developed in plants growing spon- 

 taneously. 



16. DANTHONIA DC. 



Tufted perennials with narrow blades and rather small panicles of relatively large 

 spikelets. 



Culms bearing a single spikelet (sometimes a second partly developed one on an 



appressed pedicel below) 1. D. unispicata. 



Culms bearing panicles of few to several spikelets. 



Panicle open, the branches divergent; spikelets few 2. D. americana. 



Panicles narrow, dense; spikelets several 3. D. intermedia. 



1. Danthonia unispicata Munro. At low and middle altitudes on the east slope, 

 on open hillsides. B. C. to Calif, and Wis. — Plants in dense tufts, mostly less than 

 20 cm. tall, the culms somewhat spreading; sheaths conspicuously pilose; spikelet 12 

 to 15 mm. long. 



2. Danthonia americana Scribn. Meadows at the east entrance, Umbach. B. C. 

 to Calif, and Wyo.; also in Chile. — Plants in dense tufts or cushions, 25 to 70 cm. 

 tall; sheaths pilose; panicles of 2 to 5 mostly purple spikelets on divergent pedicels. 



3. Danthonia intermedia Vasey. Found at nearly all altitudes, on plains or open 

 slopes. B. C. to Calif., N. Mex., and Que.— Plants tufted, 30 to 70 cm. tall; sheaths 

 glabrous; spikelets 5 to 10 or more on erect pedicels and crowded in a narrow, purple 

 or pale, glistening panicle. 



17. BECKMANNIA Host. 



1. Beckmannia erucaeformis (L.) Host. Slough grass. Common at low alti- 

 tudes, along streams or in swampy ground. Alaska to Calif., N. Mex., and Ont.; 

 also in Eur. and Asia. — An erect, rather stout, glabrous annual, with flat blades and 

 numerous short erect spikes on an elongate axis; spikelets flattened, somewhat heart- 

 shaped in outline, overlapping. 



18. CATABROSA Beauv. 



1. Catabrosa aquatica (L.) Beauv. East entrance, about pools. Alaska to Colo., 

 Que., and Lab.; also in Eur. and Asia. — A semiaquatic perennial, 20 to 30 cm. tall, 

 with creeping base, soft flat blades, and open panicles of brown spikelets tipped 

 with white. 



