SPECIES AND VARIETIES. 339 



of unequal length, arranged in alternate bunches along the 

 main axis ; awn twice as long as the spikelet, twisted at the 

 base, abruptly bent about the middle. Haver. A common 

 weed of cultivation. Fl. June, July. 



A. pratensis: stems erect, 1-1 i foot high; leaves scabrous; 

 panicle slightly compound or reduced to a simple raceme, the 

 spikelets erect, 3 4-flowered, glabrous, shining; awn twice 

 the length of the glumes. Meadows and limestone pastures. 

 Fl. July. 



(317) Trisetum. 



T. flavescens : steins erect, 1-2 feet high ; panicle oblong, 

 3-5 inches long, with slender, somewhat spreading branches, 

 the spikelets erect, shining, often yellowish ; awn twisted, but 

 short, very fine and hair-like. Dry meadows and pastures. 

 FL July. 



(318) Arrhenatherum. FALSE OAT, OR OAT-GRASS. 



A. avenaceum : stems erect, 2-3 feet high ; leaves few, 

 flaccid ; panicle narrow, loose, 6-8 inches long, spreading only 

 whilst in flower ; outer pales with a fine bent awn on the 

 middle of the back about twice its own length. Meadows, 

 hedges, and thickets. Fl. June, July. 



(319) Holcus. SOFT-GRASS. 



H. lanatus : roots fibrous ; stems 1-2 feet high, clothed, like 

 the leaves, with short down ; panicle 2-3 inches long, whitish, 

 or sometimes reddish ; outer glumes obtuse, concealing the 

 awn of the pales. Meadows, pastures, and waste places. Fl. 

 June, July. 



H. mollis : similar to the last, but creeping ; outer glumes 



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