Graminese. 169 



AVE'NA FAT'UA {76). Wild Oats. 6—7. Stem 1—3 ft., leaves bright 

 (1683) g''een, panicle 6 — lo in. spreading, spikelets i in. green drooping 



usually 3-flowered, glumes and pedicels hairy, awn brown twice as long 



as the glume. Corjifields. 



AVE'NA PRATEN'SIS {73). Narrow-leaved Oats. 7—8. Leaves 

 (1681) glaucous glabrous, panicle erect loose, spikelets -erect \ — | in. with 



3 — 5 florets, awns as long as the glume scarcely bent. Moors and dry 



pastures. 



AVE'NA FLAVES'CENS (88). Yellow Oats. 6—7. Panicle spread- 



(1679) ing 2 — 4 in., branches many half whorled, spikelets many compressed 

 \ in. erect yellowish, awns spreading. Dry pastures. 



AVE'NA PUBES'CENS (85). Downy Oats. 6—7. Panicle erect 



(1680) scarcely branched compressed, leaves pubescent, spikelets erect 

 3-flowered, awns purplish long and spreading. Dry pastures. 



yiyi.—BROMUS. 



Spikelets laterally compressed 5 or more flowered in loose panicles, empty 

 glumes 2 unequal usually keeled shorter than the lowest floret, outer palea 

 convex bifid at the tip with a long awn. 



Lower empty glume i -nerved, 652 



Lower empty glume 5-nerved, 653 



652 Outer palea twice as long as the awn, 654 



652 Outer palea much shorter than the awn, . . B. sterilis. 



653 Spikelets pubescent, B. mollis. 



653 Spikelets rough, 655 



654 Panicle erect, B. erectus. 



654 Panicle nodding, B. asper. 



655 Flowering glumes imbricate not longer than the awn, B. racemosus. 



655 Flowering glumes not imbricate longer than the awn, B. secalinus. 



Bro'mus erec'tus (44). Upright Brome-grass. 6—7. Stem i — 3 ft. erect 

 (1734) glabrous, rootstock creeping, leaves rigid narrow almost subulate, 

 panicle erect narrow flowering, glume lanceolate rough twice as long 

 as the straight awn. [M. C CI. 



BRO'MUS SECALI'NUS (80). Field Brome-grass. 6—7. Stem 1—4 

 (1739) ft. erect rigid glabrous, leaves \ in. broad, panicle nearly erect hairy, 



spikelets compressed with 5 — 8 ovoid closely packed flowering glumes, 



awns nearly as long as the glumes. Cornfields. 



BRO'MUS AS'PER (93). Hairy Brome-grass. 7—8. Stem 4—6 ft. 

 (1733) high slightly rough, panicle drooping 3 — 5 in. with long slender 



branches, spikelets thin narrow 7 — lo-flowered, awns short. Damp 



woods. 



