408 MONOCOTYLEDONOUS PLANTS. 



2. K. truncata Torr. : leaves flat, smooth ; panicle oblong, racemose ; 

 glumes 2-flowered, with a third abortive floret, unequal ; lower glume 

 a little scabrous, obtuse ; palese smooth. Aira truncata Muhl. Holcue 

 striatns Linn. 



b. major Torr. : panicle large, a little spreading ; leaves broad- 

 linear, very long. 



HAB. Dry woods. N. Y. to Car. June. U.Cidm 2 feet high, 

 slender. Panicle loose, racemose. 



38. BROMUS. Linn. 



Glume 3 20-flowered. Valves shorter than the florets, 

 which are imbricated in 2 rows. Lower palea cordate, emar- 

 ginate below the end, sometimes torn in two, with a straight 

 beard. Scales ovate, smooth. Triandria. Digynia. 



1. JB. secalinus Linn.: panicle spreading, a little branched; spikelets 

 oblong-ovate, compressed ; florets about 10, distinct, rather remote, 

 longer than the flexuous bristles ; leaves somewhat hairy. 



HAB. Cultivated grounds. Penn. to Car. June. . Culm 

 2 3 feet high ; nodes swollen, pubescent. Panicle oblong, 

 erect, branched. Introduced. Chess or Cheat. 



2. B. molUs Linn. : panicle erect, contracted ; spikelets oblong- 

 ovate, somewhat compressed, pubescent ; bristle straight, as long as 

 the pale ; leaves very soft pubescent. 



HAB. Fields and pastures, N. Y. and Penn. June. $.Cidm 

 2 feet high, pubescent. Panicle 3 4 inches long; spikeleU 

 5 10-flowered. 



3. B. pvrgans Linn. : panicle nodding ; spikelets lanceolate, terete ; 

 florets hairy ; bristle straight ; leaves smooth ; sheaths hairy. 



HAB. Wet meadows. Can. to Car. N. to Arc. Amer. ; rare. 

 Aug. 21. Culm 2 4 feet high. Panicle diffuse with scabroui 

 and flexuous branches. 



4. B. ciUatus Linn. : panicle nodding ; spikelets oblong, terete, 

 8 10-flowered ; glumes acute, (not mucronate,) ciliate ; palese hairy ; 

 margin villosely ciliate ; bristle short. 



HAB. River banks. Penn. to Car. June. 21. Culm 3 feet 

 high, hairy at the joints. Panicle nodding, with 2 bracts at 



5. B. pubescens Muhl. : panicle at length nodding ; spikelets lanceo- 

 late, terete ; florets pubescent ; leaves and lower sheaths pubescent. 

 HAB. Woods. Penn. MM. June. UCulm 4 feet high, 

 erect. Panicle scabrous with 2 5 branches. 



39. POA. Linn. 



Spikelets oblong or linear, compressed, many-flowered, 

 (3 20.) Glumes shorter than the florets. Paka sometimeg 



