ogj BOTANICAL GAZETTE. 



nerved, the midnerve terminating in a short, stiff niucro, the palet 

 strongly 2-nerved and bifid or 2-cleft at tne apex. Stipe of the second 

 flower about half a line long. 



This I have received from Mr. J. Macoun, collected three differ- 

 ent seasons on the Great Plains of British America. It is also the No. 

 621 of Hall and Harbour's Colorado collection. 



Sporobolus Jonesii, n. sp., — Culms densely tufted, erect, i to 

 i^ ft. high, wiry; radical leaves numerous, short, rigid and involute, 

 except the lowest ; culm with i or 2 leaves below, the blade about i 

 inch long, setaceous, sheath four times as long, scabrous. Panicle 

 erect, thin, i>^ to 3 inches long, rays solitary, appressed, the lower i 

 to i>2 inches long, subdivided from the lower third ; spikelets mosdy 

 very short pedicelled, about xV^. lines long; glumes about ^ as long 

 as the flower, broad, obtuse or truncate, and the apex erosely toothed, 

 thin and purplish ; flower with a distinct pedicel or callus, the flower- 

 ing glume and palet much aUke in texture, firmly membranaceous, i 

 nerved, finely scabrous and slightly pubescent below, I to ii/< lines 

 long, the palet narrower and but liitle shorter, after flowering becom- 

 ing more elongated, cylindrical and pointed. 



Collected bv Prot. M. E. Jones at Soda Springs, Cal. 



PoA PURPURASCENS, n. sp. — Culms erect, i to i}^ feet high, 

 smooth ; cauline leaves mosdy 2, the lower ones 2 or 3 inches 

 above the base, the upper with a long sheath running above the middle 

 of the culm, blade flat, 2 to 3 inches long, thickish, pungendy point- 

 ed, i^ lines wide, ligule about 2 lines long, membranaceous, entire or 

 incised, sheath and blade glabrous; panicle erect,oblong or pyramidal 

 when expanded, 2 to 3 inches long, rays in twos or threes, single 

 above, an inch long or less, mostly flowering above the middle, each 

 with, usually, 2 or 3 spikelets. Rachis, rays and pedicels glabrous. 

 Spikelets ovate, about 4 lines long, short pedicelled, 3 to 5 flowered ; 

 outer glumes broadly scarious margined, the lower about 2 lines lon.u, 

 ovate-lanceolate, acute, the upper a little longer and wider with the 

 apex coarsely toothed, or entire and acute, 3 nerved at the base; 

 flowering glumes 3 lines long, lanceolate, compressed, with a wide 

 scarious and purplish margin and apex, sometimes lacerate toothed, 

 mostly acute, the lower part green, minutely scabrous, and near the 

 base pubescent or villous: palet a little shorter, narrow, 2 keeled, sca- 

 rious and colored at the apex. Panicle and lower leaves and sheaths 

 purplish. 



Collected by Mr. Howell on Mt. Hood, where it was also collect 

 ed by Mr. E. Hall, Oregon Coll. No. 633. It has also been collected 

 in the Yellowstone region. 



Mr. Howell's collection contains specimens of the grass which 

 has been called Poa, and more recently Atropis, Califomica. 

 In the Botany of California the genus Atropis is made to in- 

 clude not only several species which ha^e been classed in Glyceria■A\^(S. 

 Sckrochloa, viz : Glyceria disfans, tenuiflora, convoluta, airoidcs, marit- 

 ima zwd proaimhens, but also Mr. Nuttall's two species Poa teniiiflora 

 and P. Andina, as well as two species described there for ihe.first time. 

 Any one accjuainted with these grasses will perceive that in order 



