262 POACE.E. 



awl-sliaped, about 2 mm. long; floral glume and palea lanceolate, 

 2-toothed, 3 mm. long, the former 3-nerved, nearly smooth, and 

 bearing an awn about its length. 



New Mexico, U. S. Dept. Agricid. 317; New Mexico, Jones; 

 Colorado, Cass id i/. 



Plains of Colorado and New Mexico. 



4G. M. Lemmoni Scribn. ; Yasey, Contrib. V. S. Nat. Herb. 

 3 : 70 (1892). JL Huachucana ^'asey, Monog. Grasses U. S. & Brit. 

 Am. 69 (1890); Contrib. U. S. Nat. Herb. 3:69 (1892). 



A slender upright scabrous much-branched grass, 30-70 cm. 

 high, with creeping rootstocks. Sheaths longer than the in- 

 ternodes; ligule fringed, 0.7 mm. long; blades numerous, erect, 

 loosely involute, 8-15 cm. long, 1.5-2.5 mm. wide. Panicle nar- 

 row, interrujjted, 8-20 cm. long, consisting mainly of interrupted, 

 appressed, spikelike rays 2-4-7 cm. long. Spikelets sessile or nearly 

 so; empty glumes equal, 1-nerved, scabrid, 2.5-3.5 mm. long, 

 sometimes including a bristle one-third as long as the glumes; floret 

 pubescent for the lower half, the glume strongly 3-nerved, 3 mm. 

 long, linear, obtuse when spread, or with two short blunt barbs, 

 the awn 1-2 mm. long; palea scarcely obtuse when spread, equal 

 or a very little longer than its glume. 



It differs from J/, pauciflora Buckley in having shorter awns, 

 longer and more pointed empty glumes, and a hairy floral glume. 



Arizona, Lemmon 392, 2418, 2915, 4663; Texas, JVeaUei/; 

 Mexico, Pringle 395. 



47. M. pungens Tburb. Proc. Phila. Acad. 78 (1863). 



A tufted erect pale greeii jjerennial, 30-50 cm. high. Sheaths 

 longer than the internodes; ligule a ciliate ring; blades firm, invo- 

 lute, rigid, pungent, those of the culm 3-6 cm. long. Panicle oj^en, 

 thin, ovoid, about 15 cm. long, rays solitary, branches capillary, 

 spreading. Spikelets mostly with pedicels 2 cm. or more long, in- 

 cluding the awn, 5-6 mm. long; empty glumes subequal, 1-nerved, 

 bristly-pointed, about 2.5 mm. long; floret sometimes with a very 

 minute rudiment of a second floret, floral glume very sparingly 

 bear.ded at base, linear-lanceolate, 3-nerved, 4 mm. long, the awn 1-2 

 mm. long; palea nearly as long as its glume, bearing 2 setose teeth. 



