MANUAL OF THE GRASSES OF THE UNITED STATES 



269 



Figure 362. — Hordeum jubatum, X 1. (Blankinship 189, Mont.) 



an empty lateral floret in the same 

 triad), the awn 2 to 5 mm. long; spike- 

 lets extremely variable, the spike 

 sometimes slender, the perfect floret 

 5 to 6 mm. long, the awn 5 to 6 mm. 

 (The name H. nodosum L. has been 

 misapplied to this species.) % — 

 Meadows, bottom lands, salt marshes, 

 grassy slopes up to 3,000 m., Aleutian 

 Islands and Alaska to California; 

 Labrador, Newfoundland; Montana 

 to New Mexico and Arizona to Cali- 

 fornia; adventive Maine, Indiana, 

 Mississippi. 



4. Hordeum californicum Covas 

 and Stebbins. Densely tufted peren- 

 nial; culms slender, 30 to 55 cm. tall; 

 lower sheaths softly retrorse-pubes- 

 cent to glabrous; blades 2 to 3 mm. 

 wide, the auricle wanting ; spike erect, 

 2.5 to 6 cm. long, mostly purplish; 

 floret of central spikelet 6 to 7 (rarely 

 8) mm. long, the awn 4 to 10 mm. 



long, the rachilla behind the palea 

 often wanting; floret of lateral spike- 

 let much reduced, scarcely distinct 

 from the awn. % — Meadows, 

 dried creek beds, and brushy flats and 

 slopes, Oregon and California; scarce, 

 probably depauperate dry ground 

 plants of the preceding. 



5. Hordeum pusillum Nutt. Little 

 barley. (Fig. 364.) Annual; culms 10 

 to 35 cm. tall; blades erect, flat, the 

 auricle wanting; spike erect, 2 to 7 

 cm. long, 10 to 14 mm. wide; first 

 glume of the lateral spikelets and both 

 glumes of the fertile spikelet dilated 

 above the base, attenuate into a slen- 

 der awn 8 to 15 mm. long, the glumes 

 very scabrous ; lemma of central spike- 

 let awned, of lateral spikelets awn- 

 pointed. O — Plains and open, es- 

 pecially alkaline, ground, Delaware to 

 Washington, south to Florida, south- 

 ern California, and northern Mexico; 



