Oedee 156.^GRAMINB^. 803 



joints ; from creeping rldmmes, 1 to 2f ; Iva. lance-liaoar, rough above and some- 

 what hgiry ; stip. short truncate; spike compressed, about 3' in length; spilieleta 

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

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

 difiSoult to eradicate. June — A.ug. § 



|8. d^systIohium. Glaucous, very smooth ; spikelets 5 to 9-flowered, whitish 



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



3 T. oaninum E. & S. Dog's Couce Ghass. St. 2 — 3f, erect or oblique ; Ivs. 



fiat, smooth ; stip. almost wanting ; spikelets about 5-towered; glumes 3-veined, 



and with the outer palea, terminating in a straight, 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, t'le 2 lower flow- 

 ers fertile, sessile, opposite, the upper one abortive ; glumes subulate, 



• opposite, shorter than the flowers ; lower palca with r, very Idng awn, 

 upper often bifid at apex ; scales abortive, hairy. 



S. Cere^le L. Culm hairy beneath the spike, 4 — ef; Ivs. lance-linear, rough- 

 edge, and rough above, glaucous ; ^pike about 5' long, linear, compressed ; palese 

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

 erect. — (E or d) The native country of this highly valuable grain is unknown. 

 It has long'been cultivated. Jn., Jl. 



53. LEPTOCH'LOA, Beauv. (Gr. Xenrog, slender, x^oa, grass.) 

 Spikelets 2 to oo-flowered, subsessilo, in one-sided spikes forming a pani- 

 cle raceme; glumes carinate, awnless; palesmembranous, lower 3-veined, 

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

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

 Nutt.) 



§ Spikelets sessile, few-flowered, lower pale entire at the acntish apex Nos. ], 2 



^ Spikelets pedicellate, 6 to 9-flowered, lower pale notched and miicronatc at end No. S 



1 L. muorouata Kunth. Culm geniculate at the lower joint?, 2 to 3f, ascend- 

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

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

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

 than the mucronate-poi/nted glv/mes. — d) Fields, S. States, common. Jl. — Oct. 



2 L. filiformis R. & 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 ; spikelets purple, sessile, minute, sub-3-flowered, a little exceeding 

 the merely acute glumes ; fls. obtuse. — CU ? Fields, S. States. (Oxydenia attenu- 

 ata jSTutt.) 



3 li. fascioularis Gr. Glabrous, stout, ascending from a geniculate base 2 to 

 4f; lvs. long and broad (If by 9", more or less); pan. dense, oblong, 9 to 15', 

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

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

 raucronate-awned in the notch at the apex. — Marshy soils, N. Y. to La., yf. to 

 111. (Festuca, Lam. F. multifiora Walt. F. polystachia Mx.) 



54. GYMMOPO'GON, Beauv. (Gr. yv(iv6g, naked, Trwytoi-, beard.) 

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

 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. racemfisuin Beauv. Culm ascending 18 to 24', with short intemodes; 

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

 Blieaths hairy at the throat ; lig. obsolIRe ; pan. large, pyramidal, branches simple, 

 Tigid, flowering near their whole length, soon spreading or reflexed, 3 to 5' long; 



