OR AMINE .E. 421 



Dry soils. June. Per. Riot extensively creeping. Calm. 12 to 18 inches high, 

 erect. Leaves long pubescent on the upper side. Panicle contracted. Introduced. 



27. BR0MU3. Linn. Brome-grass. Cheat, 



Brr.mos. a name given by the Greeks to a kind of oats. 



Spikelets oblong, 5 to many-flowered, panicled. Glumes 

 unequal, membranaceous, the lower 1 to 5-nerved, the upper 

 3 to 9-nerved. Lower paleje bifid at the apex, and usually 

 awned a little below the tip; upper 2-keeled, at length ad- 

 hering to the groove of the oblong or linear grain. Sta- 

 mens 3. Stigmas simply plumose. — Coarse grasses, with 

 large spikelets, at length drooping, on pedicels thicJzened at the apex* 



1. B. CILIATUS, L. Ciliate Brome-grass. 



Panicle compound, very loose, the elongated branches at length divergent, droop- 

 ing; spikeLts 7 to 12-fle-wered ; lower glume 1-nerved ; flowers oblong-lanceolate, 

 tipped with an awn, J.£ to % their length ; upper paltce bristly-ciliate ; the lower 

 eilky, with appressed hairs near the margins. (B. Canadensis, Michx. B.pube- 

 Bcens, Muhl. B. purgans, L.) 



River banks and moist woodlands. July, Aug. Per. Calm 3 to 4 feet 'high. 

 Leaves large, x /± to % inch wide smooth or somewhat hairy ; the sheaths often 

 hairy or densely downy near the top. Variable as to its pubescence, &c, 



2. B. SECALINUS, L. Cheat. Chess. 



Panicle spreading, the drooping peduncles but slightly branched; spikelets oblong- 

 ovate, turgid, smooth, of 8 to 10 flowers overlapping each other, mostly longer 

 than the awns; lower glumes 5-nerved; upper 7-nerved. 



Cultivated grounds, common in grain-fields. June. Ann. Cu'.m 2 to 3 feet 

 high, with swollen and pubescent joints. Leaves broad linear, hairy above. Pani- 

 cle 4 to 6 inches loug. Introduced from Europe. This troublesome grass is very 

 common in wheat fields, especially when the grain is injured by frost; which has 

 given rifle to the common, but mistaken idea, that wheat is changedinto this plant. 



3. B. MOLLIS, L. Soft Brome-grass. 



Panicle erect, close, compound ; spikelets ovate, flattish, the flowers cle3ely im- 

 bricated, downy, as long as the awn. 



Fields and pastures, sparingly naturalized. June. Biennial. Culm 1 to 2 feet 

 high. Leaves very soft, pubescent. Panicle 3 to 4 inches long. Spikelets nearly 

 erect, 5 to 10-tiowered. 



4. B. ARVENSis, L. Field Brome-grass* 



Panicle erect, spreading; spikelets lanceolate, compressed, 7 to 8 -flowered ; flower 

 imbricate, compressed, smoothish, about as long as the straight awn. 



Fields and meadows. West Chester. Darlington. June, July. Ann. Culm 

 about 2 feet high, smooth, with dark-colored pubescent joints. Leaves lance* 

 lixifcar, hairy on both sides. Panicle slender, spreading, at length drooping. 



28. UNIOLA, Linn. Spike-grass. 



An ancient name of some grass. 



Spikelets compressed, many-flowered 5 one or more of 

 the lower flowers sterile, and consisting of a single palese. 

 U2 



