250 I'OA("E.E. 



liuule hiscerate, 2-'^. 5 mm. \on^; bliulori thin, involute or flat. 8-l;i 

 cm. long, 1.5-'^ nun. wide. Piinicles slender, linear (or sj)read- 

 ing?), 10-15 cm. long, rays single or more or less clustered, the 

 longest rarely brauching, 4-5 cm. long, bearing 4-8 spikelets along 

 the outer half or two-thirds. 8})ikelet3 racemose on pedicels about 

 1 mm. long; empty glumes equal, hyaline, awl-shaped, 1-nerved, 

 1.5-ii mm. long; floral glume .'{-nerved, almost hyaline, linear- 

 lanceolate, pubescent on the margins, ::2-toothed, 2.5 mm. long, tiie 

 awn about the same length; j)alea 2-toothed, as long as its glume. 

 Antliers oval, 0.4 mm. long. 



Mexico (Jalisco), rahncr 045. 



23. M. filiculmis Vasey, C'ontrib. U. S. Nat. Herb, 1 : 267 

 (1893). 



A slender erect smooth glauc(ms perennial. 20-30 cm. high. 

 Tiigule 2-2.5 mm. long; blades involute, about 0.5 diani. before 

 spreading, none extending more than one-third the heiglit of the 

 culm. I'anicle simple, narrow. 3-4 cm. long, longest ray 1-2 cm. 

 long, flower-bearing for the outer two-thirds. Spikelets with first 

 empty glume 1-nerved. 1 mm. long, second 3-nerved, 3-toothed. 5 

 mm. long; floral glume ciliate on the maigins of the lower half, 3- 

 nerved, 2.5 mm. long, shading into an awn about 1 mm. long; 

 palea linear to ellii)tical when spread, as long as its glume. Anthers 

 3 in number. 1.4 mm. long. 



Colorado (Fte Pass), ('. S. SheUon in 1802, at 8500 feet alt. 



Nearly related to M. gracili.-i breviaristata Vasey, but more 

 slender. 



24. M. monticola Buckley, Proc. Acad. Phila. 91 (1862). 



An erect or decumbent branching glabrous light reddish-green 

 [)erennial, 30-00 cm. high. Sheaths shorter than the internodes. 

 the lower ones crowded off by branches; ligule thin, lascerate, 2-3 

 mm. long; blades involute, 5-10 cm. long, 2 mm. Avide. Panicle 

 slightly exserted, or the base included, slender, interrupted, loosely 

 spikelike, 4-10-15 cm. long; rays simple, appressed, flower-bearing 

 for the entire length, 0.5-3 cm. long. Spikelets on pedicels 0.5-2 

 mm. long; empty glumes thin, linear, acute or obtuse, 1-nerved; 

 first 1 mm. long, second 1.5-1.7 mm. long; floral glume acute. 



