260 POACE.E. 



numerous. Slieatlis mostly half the length of the intcrnodos; 

 ligule ciliate. about '2 mm. long; blades Hat or involute, bristle- 

 pointed, 2-0 em. long. 1.5 mm. wide. Panicle thin, pyramidal or 

 ovoid, 8-10 cm. long; rays about 10 in number, single, the longest 

 sparingly branched, bearing 5-10 spikelets. Spikelets on pedicels 

 •^-5 mm. long; empty glumes linear-lanceolate, 1-nerved. 'i.'2-)l.b 

 mm. long; lloral glume thinly and shortly pubescent on the lower 

 hall", ovate, acute, '^'-toothed. 3-nerved, 3 mm. long, awn 3-G mm. 

 long; palea much like its glume, excepting in the luimbur of nerves. 

 Antliers 1.8 mm. long. 



The following is a note from Prof. Scribner: " 'J'hurber's .)/. 

 Te.ratid was first described and published in Porter tS: Coulter's 

 Syiu^psis of the Flora of Colorado (187-1), It is there given 

 ' Muhletihvrgia Tcxana 'i'hurber in (}ram. Mex. Bound, ined." From 

 this it appears that liuckley'sname should stand, with M. JUirk-leij- 

 ana Scrib. as a synonym, while a new name must be given to 

 Thurber's grass. We will name this last M. J^oiieri, as it a[)pears 

 that Dr. T. C. Porter first described it." 



Arizona, V. 8. Dei)t. Agricul. from Ihisby, Priiiglc ; Texas 

 Ncidlcij. 



Texas to Arizona, (yalifornia. and Mexico. 



43. M. dumosa Scribn. Vasey. Contrib. 17. S. Xat. Herb. 3:71 

 (1892). 



An erect jierennial. 120-150 cm. liigh, profusely b •iiMching 

 toward the toj). from woody rootstocks. Culms very hard, nodes 

 unusually numerous. 2")-,'")() ■;ome of the sleiuler upper branches 

 with 35 nodes. Sheaths hai. or two-thirds as long as the inter- 

 nodes; ligule a mere ring; blades lanceolate, flat. 25 cm. long, 

 passing gradually to those much shorter, those on tiie very slender 

 branches often deciduous. Panicles very mimerous, simple, 1-2.5 

 cm. long; rayn single, about 5 in number, bearing a few sessile 

 single or clustered spikeitts, Spikelets often purplish: emi)ty 

 glumes nearly equal, ovate, about 1.5 mm. long, the single nerve 

 ending in a mucro; tlora' glume pubescent on the niai'gins along 

 the lo)ver half, oval-lanceolate, 3-nerved, 3-4 mm. long, the awn 



