CATALOGUE. 291 



(1132). Culm 2-3°, erect, rather stout; culm-leaves broadly linear (3-5' 

 long, 3" broad), gradually tapering to a point, rather scabrous ; sheaths 

 mostly smooth, shorter than the internodes ; panicle 4-8' long ; rays 2-5 

 together, mostly in twos or threes, 2-3' long, and capillary, smooth or 

 slightly scabrous, diverging, flower-bearing mostly for the upper third ; 

 spikelets 3-5-flowered, light green, rather loose; glumes acute, thin, smooth, 

 except slightly hispid on the keel, obscurely nerved ; lower palet distinctly 

 3-5-nerved, slightly pubescent, rather more so on the keel and margin 

 below, acutish. 



Poa Wheeleri, Vasey. — Culms 1^-2 feet high ; radical leaves rigid, 

 involute and cuspidate-pointed, 5-10 inches long; culms from running root- 

 stocks like Poa brevifolia, Muhl., and having a panicle like that with capil- 

 lary branches in pairs ; flowers acute, not webbed. — South Park, Colorado, 

 1873 (1131).— Plate XXVIII. Fig 1. Natural size. 2. Spikelet, mag- 

 nified 5 diameters. 3. Upper floret, with rudiment, magnified 7 diameters. 



Poa arctica, R. Br. — Culms 1^-2° high, erect, slender, very smooth, 

 as are the sheaths and leaves ; leaves about 2 on the culm, 2-3' long, 

 narrow-linear; panicle 4-5' long; rays simple or in pairs, capillary, lower 

 ones 2-3' long, rather distinct, spreading and reflexed with age, branched 

 near the extremity with few spikelets ; spikelets mostly 3-flowered ; 

 glumes broadly ovate, rather acute, purple-margined; flowers ovate, acute, 

 obscurely 3-5-nerved, smooth, except pubescent on the keel and lateral 

 nerves, slightly webbed. — Along mountain streams. Twin Lakes, Colo- 

 rado (1144 and 1145). 



Eragrostis Purshii, Bernh.f — Nevada, 1871 and 1872; Camp Lowell, 

 Arizona, 1874 (1004). 



Eragrostis pilosa, Beauv. — Saguache Creek, Colorado, 1873 (1146). 



Eragrostis po^oides, var. megastachya, Beauv. — Ash Creek, Ari- 

 zona, 1874 (305). Var. foliosa, Cienega Creek, Arizona, 1874 (591). 



Festuca ovina, L.— Utah, 1871 and 1872; Colorado, 1873(1149). 



Festuca ovina, L., var. duriuscula. — Twin Lakes, Colorado, 1873 

 (1150). 



Festuca ovina, L., var. — Mount Graham, Arizona, 1874 (424). 



Festuca ovina, L., var. aeistata. — South Park, Colorado, 1873 (1148). 



