TRIANDRIA DIGYNIA. 311 



ovate, compressed ; florets about ten, distinct, rather remote, lon^ei 



than the flexuous bristles, leaves somewhat hairy. 

 HAB. Cultivated grounds. June, <v) ; culm 2 -3 feet high; node* 



sicelled and pubescent; leaves dark green ; panicle ovate, flat when 



old. 

 B. ciliatus ; panicle nodding ; spikelets oblong, terete, 8 10-flowered ; 



glumes acute, (not mucronate,) ciliate ; corolla hairy ; margin villoae- 



ly ciliate ; bristle short. 

 HAB. Banks of rivers. June, 1\. ; culm 3 feet high, pubescent at 



the joints ; leaves pale green, hairy both sides ; pan. with two bracts 



at base. 

 B. pubescens ; panicle at length nodding ; spikelets lanceolate, terete ; 



florets pubescent ; leaves and lower sheaths pubescent. 

 HAB. Woods. June, 1{- ; culm 4 feet high, hairy below ; leaves 



smooth beneath. 



58. AIRA. Hair-grass. 



A. flexuosa : panicle spreading, trichotomous ; branches flexuous ; 



calyx a little shorter than the florets, and about the length of the awn ; 



leaves setaceous ; culm nearly naked. 

 HAB. Rocky hills. June, Q\. ; culm H 2 feet high; leaves mostly 



radical ; panicle capillary, cor. hairy at base. 



59. LOLIUM. Darnel. 



L. perenne : florets much longer than the calyx, unarmed, linear ob- 



lorig, compressed ; root perennial. 

 HAB. Meadows and road-sides. May June, 1J. ; root creeping ; 



culm 18 inches high, erect ; leaves smooth ; spike 6 inch, long ; rach. 



flexuous. 



60. ELEUSINE. 



E. indica: spikes straight, erect, in pairs or quarternate; rachis 

 linear; spikelets lanceolate, about 5-flowered; culm compressed, de- 

 clined. 



HAB. Cultivated grounds, and road-sides. July November, (v) ; 

 culm 8 12 inches high, ; leaves distichous ; spikes generally in pairs ; 

 rach. compressed. 



61. AGROPYRON. 



A. repens : spikelets oblong, 5-flowered ; glumes subulate, many nerv- 

 ed ; florets acuminate ; leaves flat, root creeping. 



HAB, Fields and cultivated grounds. July, 1\.] root articulate, 

 white, very long ; culm 2 feet high ; flower sometimes with a short 

 bristle. 



62. ELYMUS. Lyme-grass. 



E. mrginicus: spike erect, coarctate; spikelets in pairs, 2 3-flower- 



ed : florets smooth ; glumes lanceolate, nerved. 

 HAB. Banks of rivers. July August, 1\. ; culm 34 feet high ; 



leaves bright green ; spikes stiffly erect. 



