Oedeb 156.— GBAMINB^. 803 



joints ; from creeping rMzomes, 1 to 2f ; Ivs. lance-linear, rough above and some- 

 what hairy ; stip. short truncate ; spike compressed, about 3° in length ; spilceletg 

 remote, alternate, lance-oblong, 5 — 6-flowered; avms short or none; glumes 

 lanceolate, 5-veined, acuminate. — li A vile weed, in fields and gardens, extremely 

 di£Bcult to eradicate. June — Aug. § 



/3. BASYSTACHIUM. Glaucous, very smooth ; apikelets 5 to 9-flowered, whitiah 



all over with downy hairs. — Lake shores, Wis., Mich., Can. 



3 T. caninum R. & S. Doo's Couch Grass. St. 2— 3f, erect or oblique; Ivs. 



flat, smooth ; stip. almost wanting ; spikelets about 5-flowered; glumes 3-veined, 



and with the outer palea, terminating in a straio;ht, scabrous bristle, longer than 



the flowers. — Delaware (Muhlenberg) to Mich. § 



52. SECA^LE, L. Rye. (Celtic segal, from sega, a sickle.) Spike- 

 lets solitary on the teeth of the rachis, 2 — 3-flowered, the 2 lower flow- 

 ers fertile, se.ssile, opposite, the upper otic abortive ; glumes subulate, 

 opposite, shorter than the flowers ; lower palea with a very long awn, 

 upper often bifid at apex ; scales abortive, hairy. 



S. Cere&le L. Culm hairy beneath the spike, 4 — 6f ; Ivs. lance-linear, rough- 

 edge, and rough above, glaucous; spike about 5' long, linear, compressed; paJese 

 smooth, lower ciliate on the keel and margin ; awns soabrous-ciliater long, straight, 

 erect.— (D or ® The native country of this highly valuable grain is unknown. 

 It has long been cultivated. Jn., Jl. 



53. LEPTOCH'LOA, Beauv. (Gr. Xenrdg, slender, X'^o^'i grass.) 

 Spikelets 2 to co-flowered, subsessile, in one-sided spikes forming a pani- 

 cle raceme; glumes carinate, awnless; pales membranous, lower 3-veined, 

 carinate, awnless or awned ; stamens 3 ; stigmas simply plumous. — 

 Lvs. flat and soft. Pan. composed of many slender spikes. (Oxydenia 

 Nutt.) 



5 Spikelets sessile, few-flowered, lower pale entire at the acutish npex Noa. 1, 2 



§ Spikelets pedicellate, 6 to 9-flowered, lower pale notched and mucronate at end No. 3 



1 L. mucronkta Kunth. Culm geniculate at the lower joint.'!, 2 to 3f, ascend- 

 ing ; sheaths hairy, loose ; lvs. lance-linear, tapering to a long aoumination ; pan. 

 a foot or more long, the numerous spikes very slender, 2 to 4', flowering their 

 whole length; spilceleis green, sessile, minute, 2 to 4-flowered, awnless, shorter 

 Oian the inucronaie-pointed glumes. — ® Fields, S. States, common. Jl. — Oct. 



2 Ii. filifonnis B. & S. Culm geniculate below, upright 3 to 4f ; sheaths some 

 hairy ; lvs. lance-linear, rough-edged, twice larger (If by 9" or less) than in the 

 last ; pan. near 2f long, the numerous spikes very slender, straight and suberect, 

 5 to 8' long; spilceleis purple, sessile, minute, sub-3-flowered, a little exceeding 

 the merely acute glumes; fls. obtuse. — CD? Fields, S. Statea (Oxydenia attcnx- 

 ata Nutt.) 



3 L. fasoioul^ris Gr. Glabrous, stout, ascending irom a geniculate base 2 to 

 4f; lvs. long and broad (If by 9", more or less); pan. dense, oblong, 9 to 16', 

 with very many sessile, secund spikes 2 to 3' long ; spikelets short-pediceled, 

 lance-oblong (3 to 4"), fiat, about 9-fiowered; lower pale oblong, ciliate below, 



' mucronate-awned in the notch at the apex. — Marshy soils, N. Y. to La., "W. to 

 lU. (Festuoa, Lam. F. multiflora Walt. P. polystachia Mx.) 



54. GYMNOPO'GON, Beauv. (Gr. yvy-vo^, naked, iruyuv, beard.) 

 Spikes setaceous, corymbously paniculate ; spikelets remote, 1-flowered, 

 with a rudiment ; glumes 2-keeled, subequal, lance-linear ; lower pale 

 with a straight awn from a little below the tip ; rudiment aristiform. — 

 Low, reed-like. (Anthopogon, Nutt.) 



1 G. raoemosum Beauv. Culm ascending 18 to 24', with short internodes; 

 lvs. ovate-lanceolate, 1 to 2' by 4 to 8", glabrous, flat, spreading, in 2 rows ; 

 sheaths hairy at the throat; lig. obsolete; pan. large, pyramidal, branches simple, 

 ixgii, flowirrxng near their whole length, soon spreading or reflexed, 3 to 5' long- 



