86 POACEAE 



1 mm. wide or less; panicle narrow and spike-like, 3-5 cm. long; spikelets 2-3- 

 flowered, about 5 mm. long; lemma narrowly lanceolate, smooth, usually awned; 

 awn 1 mm. or less long. Mountains: Colo. Mont. Jl. 



5. F. brachyphylla Schultes. Stem 1-2 dm. (rarely 3 dm.) high; leaf- 

 blades nanow, involute, 1-5 cm. long; panicle 2-5 cm. long; spikelets 2-5-flowered; 

 lemma green or purplish, about 3 mm. long, acuminate; awn scabrous, 2-3 mm. 

 long. F. brevifolia R. Br. Alpine-arctic regions: Greenl. Vt. 'N.M. 'Ariz. 

 Calif. Alaska. Subalp. Alp. Jl-S. 



6. F. supina Schur. Stems 1-2 dm. high; leaf -blades stiff, involute, often 

 arcuate-spreading; panicle 1-5 cm. long, nearly simple; lemma lanceolate, 3-3.5 

 mm. long, acuminate, often tinged with red or brown; awn 1-3 mm. long. Al- 

 pine-arctic situations: Greenl. Lab. Colo. B.C.;Eu. Alp. Jl-S. 



7. F. minutiflora Rydb. Stem very slender, 1-1.5 (seldom 3) dm. high; 

 leaves mostly basal; blades 1-10 cm. long, narrow and flaccid, about 0.5 mm. 

 wide; panicle very narrow, lax, 2-4 cm. long, with very short, erect branches; 

 spikelets, excluding the awns, about 5 mm. long, 2-3-flowered; lemma about 



2 mm. long, purple-tinged above; awn 1.5 mm. long or less. Mountains: Colo. 

 Mont. Subalp. Je-Au. 



8. F. calligera (Piper) Rydb. Stem pale, 1.5-5 dm. high; leaf-blades fili- 

 form, glaucous, strongly striate, 5-15 cm. long, about 0.5 mm. wide; sheaths of 

 the stem-leaves looser; panicle narrow, 1-1.5 dm. long; branches ascending; 

 spikelets 4-7-flowered ; lemma about 5 mm. long, abruptly acuminate; awn 1-2 

 mm. long. F. ovina calligera Piper. Mountains: Ariz. Nev. -Utah Colo. 

 Son. Submont. Jl-Au. 



9. F. saximontana Rydb. Densely tufted perennial; stem 2-4 dm. high, 

 slender, glabrous; leaf -blades very slender, 3-10 cm. long, less than half a milli- 

 meter wide, strongly involute; panicle 4-10 cm. long; spikelets 4-6-flowered; 

 lemma lanceolate, 3-5 mm. long, glabrous; awn 1-2 mm. long. Festuca pseu- 

 dovina (Beal) Rydb., not Hack. Dry ridges: Mich. Sask. Colo. B.C. 

 Mont. Alp. Je-Au. 



10. F. ingrata (Hack.) Rydb. Stem 1-3 dm. high; leaf -blades filiform, 

 involute, those of the sterile shoots 1.5-3 dm. long, 0.5 mm. wide or less; panicle 

 8-15 cm. long; spikelets 3-8-flowered, 8-15 mm. long; lemma 6-8 mm. long, 

 more or less scabrous; awn 3-4 mm. long. F. ovina ingrata Hack. Meadows 

 and hillsides: Mont. Colo. Utah B.C. Submont. Subalp. 



11. F. idahoensis Elmer. Stem 7-9 dm. high; leaf-blades filiform, involute, 

 those of the sterile shoots 2-4 dm. long, less than 0.5 mm. wide; inflorescence 

 7-12 cm. long, open; spikelets 3-5-flowered, about 1 cm. long or less; lemma 

 obscurely 5-nerved, 6 mm. long; awn about 3 mm. long. Meadows: Ida. Sub- 

 inont. Jl. 



12. F. occidentalis Hook. Stem slender, 5-8 dm. high; leaf-blades 5-20 

 cm. long, glabrous; panicle loose, subsecund, flexuose, 8-20 cm. long; spikelets 

 3-5-flowered, 6-10 mm. long, pale green or purplish; lemma 5-6.5 mm. long, 

 scabrous towards the apex; awn of about the same length. Meadows and hill- 

 sides: B.C. Calif. Wyo Mont. Submont. Ap-Jl. 



13. F. arizonica Vasey. Stem 4-7 dm. high; leaf-blades 1.5-2.5 dm. long, 

 scabrous; panicle rather narrow, 7-12 cm. long; branches erect, somewhat secund, 

 scabrous; spikelets 4-6-flowered, 10-13 mm. long; lemma 6-7 mm. long, thick, 

 acuminate; awn 1-2 mm. long. F. Vaseyana Hack. Hills and open woods: 

 Colo. N.M. Ariz. Utah. Mont. Jl-S. 



14. F. viridula Vasey. Stem 3-6 dm. high; leaf -blades erect, the basal 

 ones 1-3 dm. long, involute; those of the stem often flat, shorter; panicle loose, 

 open, 1-1.5 dm. long; spikelets 3-6-flowered, 10-12 mm. long; lemma smooth 

 and shining, 6-7 mm. long, pointed. Mountain meadows: B.C. Ida. Calif. 

 Mont. -Subalp. Je-Au. 



15. F. altaica Trin. Stem erect, smooth, 3-9 dm. high; leaf-blades involute, 

 1.5 3 dm. long; panicle loose and open, 1-2 dm. long; spikelets 3-5-flowered, 



