30 TRIANDRIA DIGYNIA. Avena. 



Spikelets long, narrow, much awned, distant : about one foot and 

 a half high. Styles grow sideways out of the germ., as in Br. 

 diandrus. Specific name from the unprofitable nature of the 

 grass. 



B. diandrus. Upright jinnual Br. Panicle upright, a 

 little spreading, scarcely subdivided. Florets spear- 

 shaped, with two close marginal ribs, and only two 

 stamens generally. E. B. 1006. C. 6. 5. 



Sandy ground, walls. Iffley. Sh. Old walls about Oxford. 



Hudson. 

 An. May. 

 A foot high : less downy than B. sterilis. With an erect, more 



compact joan. never lax, nor drooping. 



AVE'NA. Oat, or Oat-Grass. 



A. fdtua. Wild Oaty or Haver. Panicle erect, much 

 branched. Spikelets drooping. Florets about three, 

 shorter than the calyx, hairy at the base, with an 

 oblique scar, all awned. E. B. 2221. ^gilops bro- 

 moides. G. E. 77- 



Cornfields. Upper Heyford, abundant. Rose Hill. Bx. 



An. Jidy. 



Ls. rough. Glumes yellow, with brown hairs. Awn two inches 

 long ; an excellent hygrometer. The oblique scar at the base 

 of each _^ore^ distinguishes this species from A. sativa, whose scar 

 is transverse, and the glumes smooth. The flowers may serve 

 for artificial flies. A troublesome weed ; extirpated by burning, 

 and fallowing. 



A. puhescens. Downy Oat-grass. Panicle erect, nearly 

 simple. Florets about three, longer than the calyx. 

 Partial stalk bearded. Leaves flat, downy. Root 

 somewhat creeping. E. B. 1640. 



Dry chalky pastures. Sm. Cowley, Li ttlemore. Bull in gd on. Sh. 



Per. June. 



Straight. Flos, club-shaped, cylindrical, summit of the glumes, 



shining, and transparent. Pan. purplish, shining, white. Not 



liked by cattle. Swayne. 



A. pratensis. Narroiv-leaved Oat-grass. Panicle erect, 

 somewhat spiked. Florets about five, longer than the 

 calyx. Partial stalk all over hairy. Leaves rolled 

 inward, finely saw-toothed, naked ; sheaths smooth. 

 E. B. 1204. 



Dry, chalky, or lime-stone pastures. Sm. 

 Per. July. 



