275 



cent floret; floral glumes olilong laiifoolate, 1^ to 2 linos long, 5-nerved, the 

 intermediate nerves less distinct, slightly pubescent Lelow and on the keel, si)ar- 

 ingly villose or webbed at the base. 



Type specimen collected at Las Vegas, Xew Mexico, by G. E. Vasey, in 1S81; 

 also collected near Albncinercine, New Mexico, by M. E. Jones, and in Utah by 

 L. F. Wiird, This species has been mentioned, withont description, as P. trivi- 

 alis variety occidtn talis (Vasey, Descr. Cat. Gr, 85, 1885). 

 Poa orciittiana Vasey, West Am. Sci. iii. Ifi5 (1887). Cnlms cespitose, abont 2 

 feet high, terete, scabrons; radical leaves nnmerous, narrow, llaccid, about 6 

 inches long, scabrous; culm leaves 2 to 4 inches long, attenuate at the apex and 

 like the sheaths scabrons, upper sheath long; ligule membranaceous, about 2 

 lines long, acute, becoming lacerate; nodes smooth; panicle 4 to 6 inches Ion"- 

 lax; branches somewhat appressed, the lower in threes, 1 to 3 inches long, the 

 lower third part or more naked, numerously flowered above; spikelets A-ery 

 short-pediceled, linear-oblong, 5- to 9-flowered, 4 to 6 lines long; empty glumes 

 nearly equal, H liiu^s long, acute or acuminate, the upper 3-nerved, scaricuis- 

 margined; floral glumes ol>loiig, erose at the subacute apex, flattish on the back, 

 scabrous, about 2 lines long, subcoriaceous, scarious tipped, 8li(>;l>tly pubescent, 

 below, 5-nerved; paletaslong as its glume, acute, ciliate-scabrous on the keels. 

 Type specimen collected in Chollas Valley, near San Diego, California, by C. R. 

 Orcutt, in 1884 (No. 1070) ; also fouzid near Vallecito, northern Lower Calilbrnia, 

 byC. R. Orcutt (No. 1440). The linear spikelets with rigid glumes give the pani- 

 cle the appearance of an Atropis. 

 Poa pattersoni sp, nov. Culms low, densely tufted, 5 to 6 inches high, naked 

 above, slender; radical leaves numerous, 2 to 3 inches long, very narrow, flat 

 or conduplicate, smooth, lower sbeaths loose; the culm leaves | to 2 inchea 

 long; panicle dense, oblong, weakly erect or nodding; branches suhappressed, 

 mostly in twos, une<iual, ^ inch long or less, bearing 1 to 4 nearly sessile spike- 

 lets; spikelets 2 to 3 lines long, 2- to 3-flowered; empty glumes nearly as long as 

 the floral ones, narrowly ovate-lanceolate, acute; floral glumes 2 lines long, pur- 

 plish, acute, pubescent on the lateral nerves and keel below the middle, but not 

 webbed; intermediate nerves very indistinct; palet three-fourths as long as the 

 glume, pubescent on the keels. 



Mountains of Colorado, near Grays Peak, 11,000 to 14,000 feet altitude; type 

 specimen collected by H. N. Paterson in 1885 (No. 154). Similar to Poa pringlei 

 Scribn., but with smaller spikelets and floral glumes pubescent. It dilfcrs from 

 Poa iaxa Haenke in the denser panicle, larger spikelets, and narrower glumes. 

 Poa pringlei Scj ibn. in herb. Cnlms tufted, 5 to 10 inches high from a rootstock, 

 decumbent at base, then erect, slender, wiry, with about 2 leaves, the upper- 

 most not reaching the middle; leaves mostly radical, 1 to 2 inches long, convo- 

 lute, rigid, recurved; those of the culm with a very short or nearly obsolete 

 blade; sheaths striate; ligule conspicuous, 2 lines long; panicle ^ to 1 inch long, 

 compact, oblong, the few branches mostly in pairs, appressed, and with one or 

 two spikelets each; spikelets very short-pediceled, large for the plant, 3 lines 

 long, mostly 2-flowered, oblong, turgid, purplish; empty glnmes thin, mem- 

 branaceous, ovate-lanceolate, nearly as long as the floral glumes, which are 

 about 3 lines long, oblong-lanceolate, subacute, scarious at the apex, smooth, 

 obscurely 5-nerved ; palet a little shorter, acutely 2-toothed, broader at the base, 

 scabrous on the keels. 



Type specimen collected by C. G. Pringle near the headwaters of the Sacra- 

 mento River, California, at 8,000 feet altitude, in 1882; a larger form collected 

 by C. F. Sonne on Mount Stanford, in 1888; and a tftiird form, with longer leaves 

 (2 to 4 inches), by Mr. Sukadorf, on Mount Adams, Washington, in 1882, and on 

 high mountains of southeastern Oregon, by Mr. Caaick, in 1885. 



