BROMUS GKAMINE^. 773 



SCUIBNEBIA 



branches 8-12 inches long, weak, spreading, usually bearing 1-3 spikelets 

 on very slender pedicels : spikeleta 1-3 inches long : empty glumes acute, 

 smooth, or scabrous on the nerves, 4-6 lines long; the second 5-7 nerved, 

 6-7 lines long : flowering glumes broadly lanceolate, acute, 7-8 lines long, 

 7-nerved, shortly bidentate at the apex, with an awn 3-5 lines long : palets 

 shorter than the glumes. Washington to Alaska, near the coast. 



B. carinatns H. & A. Bot. Beech. 403. >• Stems 20-30 inches high, 

 slightly pubescent at the nodes : sheaths mostly shorter than the in- 

 ternodes, retrorsely soft-pilose : ligulea lX-2 lines long, sublaciniate : leaves 

 mostly narrow 4-10 inches long, lJ^-3 lines wide thinly pilose both sides : 

 panicle pyramidal, somewhat drooping : spikelets IJ^ inches long, 5-9- 

 flowered : empty glumes lanceolate, acute, glabrous to slightly scabrous ; 

 the first distinctly 3-nerved, or sometimes obscurely 5 -nerved, 4-5 lines 

 long, the second 5-nerved, 5-7 lines long, flowering glumes 7-nerved, pu- 

 berulent or short-pubescent, 7-8 lines long, bifid at the apex and tapering 

 into an awn 4-5 lines long ; palets nearly equalling the glumes. Washing- 

 ton to California and Nevada. 



B. Hookerianus Thuiber Bot. Wilkes, ii, 493. An erect tufted per- 

 ennial 20-30 inches high: sheaths smooth to densely hairy, ciliate at the 

 throat: ligules J^-l line long, leaves 7-12 inches long: 2-3 lines wide: 

 panicle 7-15 inches long: spikelets 6-10 -flowered: empty glumes smooth , 

 compressed, acute ; the first 5-nerved, 6-8 lines long, the second 7-8-nerved, 

 7-8 lines long : flowering glumes oval-lanceolate, scabrous or pubescent, 

 9-nerved, 7-8 lines long; awn 3-7 lines long. Brit. Columbia to California. 



Tribe 8 Hordeee Spikelets one-to several-flowered, usually 

 hermaphrodite, sessile along the common rachis, forming a simple 

 or compound spike. Glumes awned or awnless. 



50 SCRIBNERIA Hack. Bot. Gaz. xiii, 105. 



Annual grasses with slender stems and very slender spikes. 

 Spikelets one-flowered, sessile and half embedded in the alternate 

 notches of a more or less articulated usually simple spike. 

 Eachella very short, articulated above the lower glume, extended 

 as a short hairy awn beside the floret. Empty glumes 2, flow- 

 ering glumes a third shorter than the first, membranous, keeled, 

 bearing an awn between the teeth. Palets longer than the glumes. 

 Stamens 1. Stigmas sessile, feathery. Grain free, linear, laterally- 

 compressed, with a groove. 



8. Bolan^erl Hack. Bot. Gaz. xiii, 105. Stems slender, tufted, often 

 geniculate and with a few branches from the base, 2-12 inches high : 

 sheaths loose, scarious-margined: ligules a line or more long, acute: leaves 

 3-10 lines long, convolute ,m ucrona te : spike 1-4 inches long: very slender, 

 spikelets 2-3 lines long, solitary or sometimes 2 at each joint ; glumes 

 very thick, except the first, 3-nerved, scarfous-margined; the second slight- 

 ly shorter and 2-3-nerved: flowering glumes indistinctly 5-nerved, smooth 

 and shining below, scabrous near the irregulary 2-toothed apex, the mid- 

 nerve excurrentas an awn nearly as long as the glume. Along roadsides, 

 southern Oregon to California. 



51 LOLITJM L. Sp. 83. 



Annual or perennial grasses with flat leaves and terminal spikes. 

 Spikelets several-flowered, solitary, sessile,alternate in the notches 

 of the usually continuous rachis, compressed, the edge of the 

 spikelets turned toward the rachis: glumes rigid, the lower one 



