146 SYNOPSIS OF THE FLORA OF COLORADO. 



plish, and the scarcely shorter bairy palet ending in a bent plumose awn, 

 6" in length. Hall & Harbour, 648. 



STIPA SPARTEA, Trin. -Colorado Springs, Porter. ' South Park, Canby, 

 Meehan. Wet Mountain Valley, Redfield. 



STIPA vraroULA, Trin,, Steud. Gram., 129, Culms stout, strict, and 

 with the narrow sheaths scabroiis or sometimes glabrate, 1 3j high, 

 the nodes naked; leaves elongated, mostly narrow and involute, l"-3" 

 broad, scabrous; panicle narrow, contracted, 3'-10' long, the erect 

 branches 2-3 together, flowering from the base or some of them naked 

 below; glumes nearly equal, 3"-4J" long, narrowly acuminate; lower 

 palet 2J"-3 // long, short-pilose at the obtusish base, appressed-pubeseent 

 above, and with a pilose crown at the apex ; awn about V long, twisted 

 and geniculate, minutely scabrous. Hall & Harbour, 626. Kear Denver^ 

 Dr. Smith. Canon City, Brandegee. Median. Colorado Springs, Porter! 



ARISTIDA PURPUREA, Nutt. Steud. Gram., 134. Perennial; culms 

 C'-IS' high, simple, erect, slender, mostly glabi'ous; sheaths narrow, 

 scabrous, exceeding the intern odes, pilose at the throat; leaves very 

 narrow, convolute, |'-10' long; panicle slender, erect or flaccid, 3'-6' long, 

 loosely few-flowered; glumes purplish, the upper 6"-9" long, about twice 

 exceeding the lower, and longer than the flower, bind and shortly awned ; 

 flower densely short-pilose at the pointed base, scabrous above, 6" long, 

 the awns equal or nearly so, separate to the base, not jointed, l"-2" 

 long, scabrous. Hall & Harbour, 652. Near Denver, Dr. Smith. Caiion 

 City, Brandegee. Colorado Springs and South Park, Porter. 



AKISTIDA OLIGANTHA, MX. Canon City, Brandegee. 



SPARTINA CYNOSUROIDES, Willd. Near Denver, Dr. Smith. 



SPARTINA ORACILIS, Trin., Steud. Gram. ,214. Culms l-3 high, ex- 

 ceeding the spreading distichous leaves, which are very rough upon '.the 

 margins, mostly convolute, the upper ones distant and shorter; ligules- 

 ciliate ; spikes 4-10, oblong, mostly sessile, appressed to the nearly smooth 

 rachis ; glumes very unequal, the lower acuminate, the upper acute and 

 equaling the obtusish palets, 4" long, the glumes and lower palet cili- 

 ate, hispid upon the keel. Hall & Harbour, 639. CaQon City, Brandegee. 

 South Park, Porter. In saline soils. 



PLEURAPBis 1 JAMESII, Torr. Steud. Gram., 218. Roots perennial, 

 creeping; culms 1-1J high, branching at base, erect, slender, slightly 

 scabrous, hairy at the nodes, with the leaves glaucous; sheaths close, 

 scabrous, hairy at the throat, the ligule laciniate; leaves I'-G' long, 

 mostly convolute, rigid, scabrous, the upper ones short and pungent ; 

 spike 2 / -3 / long, erect, the internodes of the flexuous rachis shorter than 

 the erect (4" long) spikelets ; flowers short-pediceled or nearly sessile 

 in the glumes; glumes of the perfect spikelet ciliate, earinate, cleft nearly 

 to the middle, the lobes 1-nerved on the inner margin, with 3-5 interme- 

 diate bristles, the central one longer ; palets exceeding the glumes, the 

 lower 3-nerved, bifid at the apex, short-cuspidate, the upper a little 

 shorter, 2-nerved and slightly bifid ; scales linear, entire j glumes of the 

 sterile spikelets equaling the palets. the lower ciliate, slightly 2-cleft, 



1 PLEITBAPHIS, Torr. Flowers spicate j the spikelets sessile by threes at each joint of 

 the rachis, surrounded at base by an involucre of soft, spreading hairs; the lateral ones 

 ataniiiiatc, the central perfect. Glumes of the perfect spikeleta '2, 1-flowered, equal, 

 narro w-cnneat* r deeply 2-eieft, 3-5 bristled ; palets membranous, the lower short-awned 

 at the apex. Glumes of the sterile spikelets 2, 2-flowered r lanceolate, inequilateral, the 

 lower 1-awned upon the back ; p alerts membranous, awnless. Stamens 3, with very 

 short filaments. Germ ovate; styles 2, distinct, the elongated stigmas simply plu- 

 mose. 



