802 Ordee 156.— GEAMINEjB. 



2 B. Europseua L. Culm erect, 3 to 5fJ lv3. lance-linear, scabrous, with aomo- 

 what hairy sheaths ; spike suberect, 5 to 8', very scabrous but nearly glabrous ; 

 spikelets ternate, 2-iiowered, wiih long (15 to 25"), stout, straight, divergiug awns 

 all of similar length. — Along river.« S. States. The long parallel awns give it 

 quite a different appearance from Ko. 3. 



3 13. Canadensis L. Culm erect, 3 to 5f ; Ivs. lance-linear, flat, smooth, dark 

 green, or often glaucous ; spike rather loose and spreading, 4 to 8' long, generally 

 nodding, rachis hairy, spikelets more or less hairy, in 23 and 3s, 3 to 6-fiowered, 

 awns of the fis. usually curved, longer (7 to \1") than those of the glumes. — A 

 tall grass, looking like Rye, with long, recurved, waving spikes. Eiver banks. Aug. 



4 E. stri^tua WiUd. St. slender, erect ; Ivs. and sheaths smooth, the former 

 lance-linear, acuminate, scabrous on the upper surface; spike erect, 2 to 3' long; 

 invol. 4-leaved, strongly veined ; spikelets in pairs, somewhat spreading, hispid, 

 1 to Z-jlowered ; awns 3 or 4 times as long as the pale. — y Mass. to Penn., W. to 

 Ohio, rare. A small and slender species. July. (B. viUosus Muld. is some larger, 

 with very hairy glumes.) 



5 E. mollis Trin. Culm velvety pubescent above, stout, 2 to 4f ; Ivs. involute- 

 compressed, glabrous as well as the striate sheaths ; spike thick, erect, 6 to 8" ; 

 spikelets in pairs, about T-flowered, awnless, all clothed with a soft pubescence; ■ 

 glumes shorter than the fls. — Lake shores, Min. and Can. "W. 



6 E. H^strix L. Culm round, smooth, 2 — i{; Ivs. lance-linear, carinate, scabrous, 

 generally glaucous and with the sheaths striate; spike 4 — 6' long, erect; rachis 

 nearly smooth, ilexuous; spikelets remote, diverging, almost horizontal, 2 — 3- 

 flowered ; glumes 0, rarely 1 or 2 ; fls. smoothish ; lower palese terminating in a 

 very long awn. — y An odd-looking grass, in moist woods, N. States, common. Jl. 



50. LO^LIUffl, L. Daenel Grass. Spikelets many-flowered, sessile, 

 remote, with the edge to the rachis; glume to the lower spikolet single, 

 to the terminal one 2 ; paloas herhaceoas, subequal, lower one short- 

 awned or mucronate, upper bifid-toothed. 



1 Ii. perdnne L. E.iy D.^enel. .Smooth; culm terete, 1^2f; Ivs. lance-linear, 

 Ehining-green, on striate sheaths with truncate stipules; rachis flexuous, grooved, 

 5 — '6' long; spikelets awnless, about 16, longer than the glume, 1 — 9-floivered, 

 alternate, in two opposite rows ; lower paleae 5-veined, upper with 2, prominent, 

 rough keels. — y Meadows, cultivated grounds, etc. May, June. § Eur. 



2 Ii. temulentum L. Poisonous D.^enel. Culm terete, .smooth, 2f ; Ivs. lance- 

 linear, rough-edged, and with the sheaths, smooth on the surface ; stip. truncate ; 

 rachis flexuous, 4 — ^6' long ; spikelets much compressed, 5 — t -flowered, not longer 

 than the glume ; lower pale 5-veined, produced into an awn twice its length. — ® 

 Eemarkably distinguished from all other grasses by its poisonous seeds. N. Eng. 

 to Penn. July, g Eur. 



51. TRIT'ICUM, L. Wheat. (Lat. Iritmn, rubbed or ground ; al- 

 luding to the manner of its preparation for food.) Spikelets imbricated 

 in 2 rows, sessile on the teeth of the rachis, about 5-flowered, with the 

 upper flowers abortive ; glumes 2, equal, opposite, ovate, concave, mu- 

 cronate ; palete 2, lower awned or mucronate ; scales 2, collateral. — Fls. 

 arranged iu spikes. 



fi TitiTiciTM pi-opfT. ® Glumes oblong, obtuse, ventricous-concavo. Spiko -l-sidcd No. 1 



I Agroi'Ykon, Kth. 2; Glumes lanceolate, pointed. Spikelets mostly 2-r;tDke.(l Nos. 2, 8 



1 T. vulgare Tillars. Common "Wheat. Culm terete, smooth, the inter- 

 nodes somewhat inflated, 3 to 5f ; Ivs. lance-linear, veined, roughish above ; stip. 

 truncate ; spike parallel, somewhat 4-sided ; spikelets crowded, broad-ovate, 

 about 4-flowered ; glumes ventricous ; awns of the upper paleas generally longer 

 than the flowers. — (T) and ® This is without doubt the most valuable plant of the 

 Order. Cultivated from the earliest historic times. Many varieties are known to 

 farmers, classed as Summer Wheat, and "Winter Wheat ; Awned or Awnless. 

 ,8. COMPOSITUM. Egyptian Whe,4.t. Spike compound. Spikelets awned. 

 2 T. ripens L. Couoh-gp.ass. Quich Grass. Culm trailing at the lower 



