306 



Fig. 300. HORDEUM BOREAX.E Scribn. & Smith, U. S. Dept. Agr. Div. Agros. 

 Bui. 4 : 24. 1897. NORTHERN WILD BARLEY.— A slender, erect, and appar- 

 ently perennial grass 3-6 dm. (lo-2°) high, with rather broad, fiat leaves, smooth 

 culms, and terminal spikes 7-10 cm. (3'-4') long. Sheaths shorter than the 

 internodes, the lower ones pubescent; leaf-blades 10-15 cm. (4'-6') long, 4-8 mm. 

 (2"-4") wide, scabrous, long-acuminate, those of the innovations longer. Spike- 

 lets in clusters of three (a); empty glumes subequal 14-18 mm. (7"-9") long, 

 setaceous and awn-like; flowering glume of the central spikelet (b) sessile, 10 

 mm. (o'O long, bearing an awn about its own length; flowering glume of the 

 lateral spikelets (c) pedicellate, about 6 mm. (3") long, subulate-pointed or 

 short-awned. The lateral spikelets are raised on curved pedicels about 1.5 

 mm. (f") long. — Mountains of California to Alaska and Bering Sea islands. 

 June, July. 



Differs from H. montanense, to which it is most closely allied, in its shorter 

 joints of the axis, longer pedicels, lateral spikelets, and setaceous, awn-like 

 empty glumes, and from //. nodosum in its greater height, broader leaves, 

 longer spikes, and more completely developed lateral spikelets. 



