262 PUAl'E.E. 



a\vl-s]iii}H'(l, filiout 2 mm. long; ilonil <rlunK' and palca lanceolate^ 

 2-to()tlK'(l, ;5 nun. long, the former :5-nervetl, nearly smooth, ami 

 bearing an awn about its length. 



New Mexico, /'. S. Jh'pl. A<jricuJ. 317; New Mexico, Jo)u'f<; 

 Cobjrado, Citxs idi/. 



Plains of Colorado and >>'e\v Mexico. 



4G. M. Lemmoni Scribn. ; Vasey. Contrib. V. S. Xat. Herb. 

 ',}: TO (18!):3). .)/. lIuarhiiaiHd Vai<ey, Monog. brasses T. S. cS: lirit. 

 Am. 0!) (1890); Contrib. U. S. Xut. Herb. ;i:G9 (189-^). 



A slender npright scabrous much-branched grass. oO-TO cm. 

 high, with cree}>ing rootstocks. Sheaths longer than the in- 

 temodes; ligule I'ringed, 0.7 mm. long; blades numerous, erect, 

 loosely involute, 8-15 cm. long, 1.5-2.5 mm. wide. I'anicle nar- 

 row. interrui)ted, 8-20 (!m. long, consisting maiidy of interruj»ted, 

 appressed, spikelike rays 2-4-7 cm. long. 8])ikelets sessile or nearly 

 so; empty glumes equal, l-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 M. paiiriJJora lUicklcy in having shorter awns, 

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



Arizona, Lcmnion 392, 2-418, 2915, 4GG3; Texas, XeaJ/ei/; 

 ^fexico. Pn')if/(c 395. 



47. M. pungens Thurb. Proc. Phila. Acad. 78 (18(i3). 



A tufted erect pale green perennial, 30-50 cm. high. Sheaths 

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

 lute, rigid, pungent, those of the culm 3-0 cm. long. Panicle open, 

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

 spreading. Spikelets mostly with })edicels 2 cm. or more long, in- 

 cluding the awn. 5-(i mm. long; emi)ty glumes subequal. l-nerved, 

 bristly-]iointed, about 2.5 mm. long; floret sometinies with a very 

 minute rudiment of a second floret, iloral glume very sparingly 

 bearded 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. 



