260 POACE.E. 



numerous. Sheaths mostly half the length of the internodes; 

 ligule ciliate, about 2 mm. long; blades flat or invokite, bristle- 

 pointed, 2-5 cm. 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 

 2-5 mm. long; empty glumes linear-lanceolate, 1-nerved, 2.2-2.5 

 mm. long; floral glume thinly and sliortly pubescent on the lower 

 half, ovate, acute, 2-toothed, 3-nerved, 3 mm. long, awn 3-6 mm. 

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

 Anthers 1.8 mm. long. 



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

 Texana was first described and published in Porter & Coulter's 

 Synopsis of the Flora of Colorado (1871). It is there given 

 ' Muhlenhergia Texana Thurberin Gram. Mex. Bound, ined.' Prom 

 this it appears that Buckley's name should stand, with M. Buchley- 

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

 Thurber's grass. NVe will name this last M. Porteri, as it appears 

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



Arizona, U. S. Dept. Agricul. from Rushy, Fringle ; Texas 

 Kealley. 



Texas to Arizona, California, and Mexico. 



43. M. dumosa Scribn. Yasey, Contrib. TJ. S. Xat. Herb. 3:71 

 (1892). 



An erect perennial, 120-150 cm. high, profusely brandling 

 toward the top, from woody rootstocks. Culms very hard, nodes 

 unusually numerous, 25-50, some of the slender upper branches 

 with 25 nodes. Sheaths half 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 the very slender 

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

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

 single or clustered spikelets. Spikelets often purplish; empty 

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

 ending in a mucro ; floral glume pubescent on tlie margins along 

 the lower half, oval-lanceolate, 3-uerved, 3-4 mm. long, the awn 



