CLASS III. ORDER III. 39 



in inundated grounds, and is very grateful to horses and cattle. — 

 June, July. — Perennial. 



Festuca acutiflora. Acute Fescue grass. 



Panicle simple, elongated, appressed ; spikelets 

 linear ; florets distinct, attenuated, acute, indistinctly 

 nerved. 



Syn, Glyceria acutiflora. Torrey. 



This grass in size and habit resembles the preceding, but the 

 leaves are shorter, and the glumes of the corollas are attenuated 

 to a sharp point, the upper valve bifid. In my specimens the 

 spikelets are about twelve flowered. — Ditches. — Dorchester. — 

 June. 



45. BROMUS. 

 Bromus secalinus. L. Rye Brome grass. 



Panicle spreading ; peduncles but little branched ; 

 spikelets ovate, compressed, of about ten distinct, 

 somewhat cylindrical florets. Sm. 



Stem erect, three feet high, smooth. Leaves flat, rough at the 

 edge and underneath, somewhat hairy above. Sheaths smooth. 

 Panicle spreading, its branches rough, unequal, mostly simple, 

 and one flowered. Spikelets large, flattish, nearly oval, of about 

 ten florets. Calyx unequal, smooth. Outer glume of the corol- 

 las swelling, with a rough awn inserted at the back a little be- 

 low the tip. — June. — Perennial. 



Bromus purgans. L. Meadoto Brome grass. 



Panicle nodding; spikelets lanceolate, terete, florets 



hairy ; bristle straight; leaves smooth, sheaths hairy. 



Three or four feet high and somewhat glaucous. — Wet grounds. 

 — July, August. 



Bromus mollis. L. Soft Brome grass. 



Panicle erect, contracted ; spikelets oblong-ovate, 



somewhat compressed, pubescent; bristle straight, 



nearly as long as the corolla ; leaves softly pubescent. 



