38 Class III. Order III. 



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. It, Meadow Brome grass. 



Panicle nodding ; spikelets lanceolate, terete, flo- 

 rets hairy ; bristle straight ; leaves smooth, sheaths 

 hairy. 



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

 July, August. 



BROMUS MOLLIS. JL. Soft Brome grass. 



Panicle erect, contracted ; spikelets oblong-ovate, 

 somewhat compressed, pubescent ; bristle straight, 

 nearly as long as the corolla ; leaves softly pubescent. 



The leaves appear somewhat less soft and the bristle shorter 

 than in the European. Fields. June, July. 



BROMUS CILIATUS. .L. Ciliated Brome grass. 



Panicle nodding, spikelets oblong, terete, eight or 

 ten flowered ; glumes acute ciliate ; corolla hairy and 

 ciliate ; bristles short. 



Spikelets rather large and strongly fringed with hairs. With 

 the foregoing there are intermediate species or varieties diffi- 

 cult to separate. 



43. ARUNDO. 



ARUNDO CANADENSIS. MX. Canada reed. 



Panicle oblong-lax ; glumes rough, pubescent, as 



long as the corolla ; corolla awned on the back ; 



