152 SYNOPSIS OF THE FLORA OF COLORADO. 
coln at 12,000 feet, Weston’s Pass, Twin Lakes and Sierra Madre Range, 
Coulter. 
IRA DANTHONIOIDES, Trin. Steud. Gram., 221. Annual, glabrous; 
culms very slender, 3/30 high, geniculate at base: sheaths apy. eXx- 
ceeding the internodes; ligules elongated ; leaves short ($/-4’) and very 
narrow or convolute-setaceous; pani icle iffuse, the capillary branchlets 
2-4 together and na ak ed below; glumes 2-flowered, with the plumose 
rudiment of a third, 2-3” long, exceedi ing the flowers; lower palet trun- 
cate and denticulate, 1 iy” long, awned below the middle, the awn 
2"—4" long, geniculate; grain free, flattish, not grooved. —Summit of 
Gray’s Peak, Dr. Sm ae 
HIFROCHLOA BOREA R. & S.— Hall & Harbour, 628. Cation City, 
Brandegee. "les aes eas Coulter. 
PHALARIS ARUNDINACEA, ic-Oniinn City, Brandegee. 
PASPALUM SETACEUM, Mx.—Hall & Harbour, 653. 
BECKMANNIA! ERUCA:FORMIS, Host. Steud. Gram., 15. Culms stout, 
19_34° high, erect from an as seending ng base, with the sheaths glabrous; 
imbrie ate ely deranotds in two eos, nearly orbicular, 14” in diameter, the 
upper rudimentary floret minute, stipitate—Hall and Harbour, 658. 
Near Denver, Dr. Smith. 
PANICUM ccna Ge, L—Cafon City, Brandegee. 
PANICUM VIRGATUM, L.—Near Denver, Dr. Smith. 
PANICUM AMARUM, Ell.—Cafion City, Brandegee. 
PANICUM PAUCIFLORUM, Ell.—Caiion City, Brandegee. 
PANICUM CRUS-GALLI, L.i—Near Denver, Dr. Smith. Cation yes 
Brandegee.—Introduced, 
SETARIA VIRIDIS, Beauv.—Caiion City, Brandegee.—Introduced. 
SETARIA IraLica, Kunth.—Caiion City, Brandegee.—Introduced. 
See TRIBULOIDES, L.— Cajon City, Brandegee 
POGON FURCATUS, Muhl.—Divide between Denver and Colo- 
aa Sprin gs, Porter. 
_ ANDROPOGON SCOPARIUS, Mx.—Caiion City and Wet Mountain Val- 
ley, Brandegee. 
' ANDROPOGON ARGENTEUS, Ell.—Hall & Harbour, 651. Caiion City, 
Brandegee. 
SORGHUM NUTANS, Gray.—Cajiion City, Brandegee. 
EQUISETACEX. 
“ onycameenbiag ARVENSE, L.—Near Denver, Dr. Smith. Clear Creek, Coul- 
EQUISETUM PRATENSE, Ehrh.—Mt. Lincoln, Twin Lakes and Sierra 
Madre Range, Coulter. 
RR ae tse 
, Host. Panicle racemose, contracted. Spikeletscompressed, 2-flowered, 
the upper floret an abortive rudiment. Glumes 2, obovate, sage gheie boat-shaped, 
subcoriaceous, ee, a little shorter than the flower, pointless. Palets membranous, 
the lower ovate, concave, acutish, mucronate, 3-nerved, the u upper 2-nerved, bifid. 
Stamens 3. oe elon gated ‘plumose stigmas. Seales 2 bifid, glabrous. Grain 
free, glabro eent perennial aquatic. 
