stipa GRAMINE.E 737 



to Washington. 



S. comata Trin. & Rupr. Mem. Acad. St. Petersb. (vi.) v, 75. Sterna 

 stout, 1-4 feet high, mostly scabrous: sheaths loose, the uppermost some- 

 times inflated, smooth, at length shorter than the internodes: ligules con- 

 spicuous, acute, 2-3 lines long: leaves smooth or somewhat scabrous, the 

 basal ones %-/4 a s long as the stems, those of the stems 3-6 inches long, 

 involute : panicle 6-9 inches long, loose, its branches 3-5 inches long, as- 

 cending: empty glumes 9-12 lines long, glabrous, acuminate into an awn 

 2-4 lines long : flowering glume 4-6 lines long ; callus acute : awn slender t 

 4-8 inches long, spiral and pubescent below : palet equalling the glume] 

 On prairies, eastern Oregon to Brit. Columbia, Alberta, Nebraska and Cal* 



S. setigera Presl Reliq. Hsenk. i. 226. Stems stout, 1)^-3 feet high, 

 often pubescent at the nodes: sheaths hairy at the throat, the lower 

 shorter than the internodes : ligules truncate, about 1 line long : leaves of 

 sterile shoots mostly involute, % as long as the stem, those of the stem 

 2-3, often flat 6-18 inches long, 3-5 lines wide : panicle usually included at 

 base in the upper sheath, 6-15 inches long, it3 slender branches mostly in 

 pairs : empty glumes subequal, or the upper shorter, long-acuminate, 3- 

 nerved, 8-12 lines long: flowering glume 6 lines long, silky-hairy on the 

 nerves, the callus sharp and curved: awn 3-5 inches long, twisted and pu- 

 bescent below, geniculate and above the middle bent again. On dry hills, 

 eastern Oregon to California, Texas and Kansas. 



S. Kingii Bolander Proc. Cal. Acad, iv, 170. Stems erect, smooth, 

 5-12 inches high, naked above, with but 2 nodes near the base which are 

 covered with the remains of many sheaths : radical leaves half as long as 

 or equalling the stem, setaceously convolute, minutely scabrous, stem leaves 

 2, the upper with close sheaths 3-6 inches long : ligule a line long, acute, of- 

 ten cleft : panicle narrow 1-2 inches long, the short erect branches scabrous 

 empty glumes obtuse, eroded and sometimes mucronate hyaline witha 

 tinge of purple at base ; the first one \%. lines long; stipe obconical scarcely 

 acute short-bearded: flowering glume ovate, brownish-purple, pubescent: 

 awn persistent, finely pubescent, loosely twisted and somewhat bent below 

 the middle : palet broadly ovate, obtuse. Eastern Oregon to Nevada and 

 California. 



S. Bloomeri Bolander 1. c. 168. Stems 1)^-3 feet high, clothed at 

 base with the remains of old sheaths : sheaths shorter than the internodes, 

 the upper somewhat inflated : leaves very narrow and convolute, smooth 

 or somewhat roughened, the lower ones about half as long as the stems : 

 panicle 6-12 inches long, erect, narrow, with distant branches: empty 

 glumes 4 lines long, nearly equal, acuminate into a slender point, 3-nerved, 

 minutely scabrous : flowering glume 2% lines long, minutely 2-toothed at 

 the apex : awn 6-9 lines long, geniculate near the middle, almost plumose 

 below, scabrous above: palet nearly as long as the glume. Eastern Ore- 

 gon to Nevada and California. 



S. Oregonensis Scribn. U. S. Dept. Agr. Div. Agrost. Bull. 17, 130. 

 Stems erect, slender 12-18 inches high ; pubescent at the nodes : sheaths 

 rather loose, minutely hispid, longer than the internodes ; ligules lacerate, 

 the lateral teeth longer : radical leaves 10-15 inches long, involute ; those of 

 the stem 3-6 inches long, conduplicate or involute, 1-2 lines wide : panicle 

 narrow, included in the upper sheaths, the branches appressed, unequal, 1 

 inch long or less : empty glumes lanceolate, slender-pointed, convex and 

 herbaceous below, thin-membranous and carinate above, sometimes purp- 

 lish: first glume 5-6 lines long, second usually % line shorter: stipe slend- 

 der, curved, acute, short-bearded: flowering glume thin-chartaceous, with 

 2 ciliate teeth, pubescent, 5-nerved : awn twisted and pubescent below, 

 naked above, usually bent twice, 1-2 inches long: palet lanceolate, cleft or 

 erose dentate at the apex, pubescent between the 2 nerves, 1% lines long. 



