144 SYNOPSIS OF THE FLORA OF COLORADO. 



MuHLENBERaiA PUNGENS, Thurber, Proc. Acad. Phil, March, 1863, p. 

 78, Note. Culm from a creeping root-stock, l-lj high; leaves rigid, 

 COD volute, pungent, spreading, I'-l^' long, less than I" wide; ligule 

 short, ciliate; panicle 3'-4' long; branches solitary, scattered, naked at 

 base, fasciculately branching; pedicels capillary, minutely scabrous, 

 many times longer than the spikelets, awn 2J" long; glumes almost 

 equal or nearly equal, acuminate or bristly-apiculate, shorter than 

 the flower; palets naked, furnished with a minute rudiment; lower 

 palet scabrous, acute, produced into a long, rough awn, (J'-l',) upper 

 palet scarcely shorter; nerves excurrent, two-bristled; stamens 3. Hall 

 & Harbour, 632. 



MUHLENBERGIA GRACILLIMA, Torr. Bot. Whippl., Pacif. R. R. Rep. 

 4, p. 155. Csespitose,' glabrous; culm simple, 6 / -12 / high; leaves very nar- 

 row, involute, short, I'-IJ', mostly in radical tufts; ligule elongated, 

 cleft; panicle 5' 6' long, pyramidal, capillary; branches sub-solitary, 

 widely spreading; pedicels nearly twice longer than the spikelet; spike- 

 lets lanceolate, mostly purplish,- 1" long; glumes acute, lanceolate, 

 scarcely twice shorter than the palets; lower palet glabrous, 3-uerved, 

 minutely bind, with a straight awn of equal length; callus naked. Oii 

 the plains. Hall & Harbour, 642. Colorado Springs, Porter. Canon 

 City, Brandegee. 



MUHLENBERGIA GRACILIS, Triu. Steud. Glum., 179. Boot fibrous ; 

 culm erect, slender, branching from the base, 1 1J high, minutely 

 scabrous, as well as the sheaths ; node smooth ; leaves erect, narrowly 

 linear, l / -4 / long, plane or convolute, rigid, retrorsely scabrous; panicle 

 contracted, S'-W long; branches solitary, appressed ; pedicels very short 

 or equaling the spikelet; lower glume 1 nerved, acute, upper 1-nerved, 

 erose-obtuse or acute, sometimes bearing an awn, twice longer than the 

 palets or a little shorter ; lower palet wholly pilose, or the middle of the 

 back and margins, bearing an awn 4 // -9 // in length, upper one on the 

 nerves short-pilose half-way up. Hall & Harbour, 064; Canby ; Bran- 

 degee ; Meehan. Ute Pass and South Park, Porter. 



MUHLENBERGIA TEXANA, Thurb. in Gram. Mex. Bound, ined. "Culms 

 geuiculately decumbent, branching; panicle ovoid, few flowered, ravs 

 solitary or in pairs, naked below, pedicels equaling or twice as long as 

 the spikelets; glumes shorter than the floret, cariuately 1-uerved, set- 

 aceously mucrouate; palets pilose, the lower terminated by an awn 

 thrice its length and equaled or exceeded by the upper one; callus con- 

 spicuous, glabrous. This species, which seems to be very common in 

 Texas and Arizona, is quite distinct in habit from others of the genus. 

 The slender and branching culras are from one to two feet long, often 

 decumbent for their whole length and geniculate at the nodes; sheaths 

 usually shorter than the internodes, mostly smooth; ligule y long, 

 lacerate; leaves. (except in specimens from the arid table-lands of Ari- 

 zona) plane, I'-l^' long, 3" wide at base, setaceously acuminate at apex, 

 and scabrous, especially above; panicle about 3' long and 2' broad, green 

 or dark-red, included at base except when old, its branches naked below 

 for or J their length and 1-3 flowered; spikelets \\" long; glumes 

 narrowly lanceolate, upper slightly longer. Texas, Bigelow ; Parry; 

 Wright, 734. Arizona, Hayes ; Goues ; Palmer." Fremont County, Col- 

 orado, Brandegee; Greene. 



MUHLENBERGIA SYLVATICA, T. & G., var. (?) SETIGLUMIS, Watson, 

 Kimfs Rep. Culms 1 high, nearly erect; panicle contracted nearly as in 

 M. glomerata ; the branches solitary and densely flowered, mostly to the 

 base ; glumes attenuate into a scabrous bristle, 2 J"-3" long ; the palet, 



