394 MONOCOTYLEDONOUS PLANTS. 



rachis 5-angled ; glumes terminating in hispid bristles ; sheaths gla- 

 brous. 



HAB. Near cultivated grounds. Aug., Sept. . Culm 24 

 feet high, terete. Panicle dense, at length spreading, some- 

 times coloured. It varies with unarmed glumes. Introduced. 



Cocksfoot-grass. 



2. P. hispidum Muhl. : panicle compound, nodding ; racemes alter- 

 nate ; glumes terminating in hispid bristles ; sheaths hispid. 



HAB. Salt marsJies. N. Y. to Car. Sept., Oct. Q.Cidm 

 34 feet high, thick. Panicle, dense. Flowers always awned. 

 Resembles No. 1, but may be distinguished by its hispid 

 sheaths. 



3. P. clandestinum Linn.: culm with short axillary branches ; leaves 

 broad-lanceolate, cordate at the base; sheaths hispid, enclosing the 

 short panicles ; abortive floret neutral, 2-valved ; upper valve obtuse. 

 P. I nl if oiium var. clandestinum Pursh. 



HAB. Moist woods. N. Y. to Car. July, Aug. If Culm 



23 feet high, erect and rigid. Panicles terminal and lateral, 

 concealed in the sheaths of the leaves. 



4. P. pedunculatum Torr. : culm dichotomous ; leaves broad-lanceo- 

 late, slightly hairy above, attenuate ; sheaths hispid and papillose ; 

 panicle long-pedunculate, compound, smooth ; spikelets ovate, smooth ; 

 abortive floret 2-valved ; upper valve half the length of the lower. 



HAB. Moist woods. N. Y. July. If. Culm 34 feet high, 

 much branched above. Panicle terminal, spreading, on a pe- 

 duncle. 



* 5. P. latifolium Linn. : culm mostly simple, bearded at the jpints ; 

 leaves oblong-lanceolate, smooth, or with the sheaths somewhat pubes- 

 cent ; panicle terminal, a little exsert, simple, pubescent ; spikelets 

 oblong-ovate ; abortive floret antheriferous, 2-valved ; upper valvea 

 cub-herbaceous, nearly as long as the lower, acute. 



HAB. Woods. Can. to Car. W. to 111. June, July. U 

 Culm a foot high. Panicle 2 inches long, with pubescent downy 

 branches. 



6. P. scopartum Lam, : whole plant softly villous ; leaves lanceo- 

 late ; panicle erect, compound, setaceous, much branched ; spikelets 

 turgid, ovate, pubescent. 



HAB. N. J. to Car. U-Cvlm 2 feet high, mostly simple. 

 Flowers larger than in any of our species. Scarcely differs from 

 the preceding. 



7. P. nercosum MuJit. : culm simple ; nodes smooth ; leaves broad- 

 lanceolate, smooth, a little ciliate on the margin ; panicle much 

 branched, smooth, many-flowered ; spikelets oblong ; abortive floret 

 antheriferous, with the upper valve sub-herbaceous, shorter than the 

 lower. 



HAB. Bogs. N. Y. to Car. July. If. Culm 34 feet high. 

 Panicle 4 5 inches long, decompound. Allied to P. latifolium, 



