SYNOPSIS OF THE FLORA OF COLORADO. 143 



VILFA AIROLDES, Trin. (Sporobolus, Torr.) Like the last, but the 

 panicle at length much exserted, very open and widely spreading; 

 flowers all on distinct pedicels; sheaths naked at the throat or somewhat 

 bearded; leaves mostly erect and involute. Canon City, Brandegee. 

 Hall & Harbour, 647. 



VILFA ASPERIFOLIA, Nees & Meyen. Culms branching at base from 

 running root-stocks, decumbent and often rooting, 6'-15' long, glabrous; 

 the smooth, naked sheaths equaling or exceeding the internodes ; leaves 

 flat, rough on the margins, l'-3' long, V broad, acuminate, tapering up- 

 ward from a broad base, erect ; branches of the loose, spreading panicle 

 capillary, solitary, axils naked; spikelets less than V long, often 2-flow- 

 ered; glumes slightly unequal, hispid on the back, acute, one-third 

 shorter than the nearly equal palets ; lower palet submucronate, the upper 

 obtuse. Canon City, Brandegee. Hall & Harbour, 641; Redfield. 



VILFA RAMULOSA, H. B. K. Steud. Gram., 158. Root annual, fibrous; 

 culms very slender, branching from the base, 3'-10' high; sheaths 

 usually longer than the iuternodes, glabrous or slightly hairy ; leaves 

 flat or" con volute, l'-2' long, J"-l" wide, roughish; panicle elongated and 

 rather narrow, often sheathed at base; brauchlets scattered ; spikelets 

 scarcely %" long, obtusish, on spreading, finely capillary pedicels ; glumes 

 nearly "equal ; palets obtuse, nearly twice longer. Divide between Den- 

 ver and Colorado Springs, Porter. Hall & Harbour, 643. 



VILFA CUSPLDATA, Torr. Hall & Harbour, 661. 



VILFA DEPAUPERATA, Torr. , Root perennial, creeping: culms ascend- 

 ing, appressed, branched, slender, often geniculate, glabrous, striate, 

 rather rigid, ^-2long ; leaves l'-3' long, narrow and usually convolute, 

 recurved or spreading; panicle, very slender, and contracted, l'-3' long, 

 compound or often nearly simple ; spikelets small ; glumes unequal, ovate, 

 obtuse or acutish, membranous, the length of the acute lower palet. 

 Like the former, but differs in its short obtuse glumes, smaller flowers, 

 narrower involute leaves and more slender habit. Hall & Harbour, 660. 

 South Park, Canby. Wet Mountain Valley, Brandegee. Divide between 

 Denver and Colorado Springs, Porter. 



VILFA TRICHOLEPIS, Torr. Pacific R. E. Rep., vol. 4, p. 155. Culms 

 erect, simple, terete, 9'-lS' high, tufted; nodes distant; sheaths glabrous ; 

 ligule truncate; leaves V 1 broad, glabrous; branches of the oblong, rather 

 dense panicle alternate", naked in the axils; branchlets flexuose ; pedicels 

 longer than the spikelets ; glumes nearly equal, acutish, J shorter than the 

 nearly equal pilose palets ; lower palet 3-uerved. Hall & Harbour, 631. 

 Pike's Peak, Canby. South Park, Porter. 



AGROSTIS SCABRA, Willd. Mt. Elbert, at 10,000 feet altitude, and 

 Sierra Madre Range, Coulter. Twin Lakes, Porter. Canon City, Bran- 

 degee. 



AGROSTIS EXARATA, Trin. Steud. Gram., 165. Root biennial, fibrous ; 

 culm simple, erect, l-2 high; ligules obtuse, l"-2" long; leaves flat, 

 linear, (l"-3" wide, 2 / -4'long,) the radical ones narrower, somewhat sca- 

 brous; panicle usually contracted and dense, 2'-4' long, the rays 3-5 or 

 more at each axil, seini-verticillate, flowering from the base, erect ; glumes 

 acute or sub-acuminate, scabrous on the back, slightly unequal, l"-2" 

 long; lower palet usually nearly a half shorter, erose- truncate, very 

 rarely awued above the middle, glabrous or a little hairy at base, the 

 upper one a little smaller than the ovary. Colorado, Vasey. 



AGROSTIS CAXINA, L. Hall tl* Harbour, 671. 



AGROSTIS VULGARIS, With. Canon City, Brandegee. Hoopes. 



