80 2 ORDER 156. GRAMINEJE. 



2 E. Europeans L. Culm erect, 3 to 5f, Ivs. lance-linear, scabrous, with some- 

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

 spikelets ternate, 2-flowered, with long (15 to 25"), stout, straight, diverging awns 

 all of similar length. Along rivers, S. States. The long parallel awns give it 

 quite a different appearance from No. 3. 



3 E. CanacUmsis 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 2s and 3s, 3 to 6-flowered, 

 awns of the fls. usually curved, longer (7 to 17") than those of the glumes. A 

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



4 E. striatua Willd. 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 ^-flowered; awns 3 or 4 times as long as the pale. U Mass, to Penn., "W. to 

 Ohio, rare. A small and slender species. July. (E. villosus MuhL 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 7-flowered, awnless, all clothed with a soft pubescence ; 

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



6 E. Hystrix L. Culm round, smooth, 2 4f; Ivs. lance-linear, carinate, scabrous, 

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

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

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

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



50. LO X LIUM, L. DARNEL GRASS. Spikelets many-flowered, sessile, 

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

 to the terminal one 2 ; paleae herbaceous, subequal, lower one short- 

 awned or mucronate, upper bifid-toothed. 



1 L. perenne L. RAT DARNEL. Smooth; culm terete, 1 2f; Ivs. lance-linear, 

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

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

 alternate, in two opposite rows ; lower palea3 5-veined, upper with 2, prominent, 

 rough keels. li Meadows, cultivated grounds, etc. May, June. Etir. 



2 L. texxmlntum L. POISONOUS DARNEL. 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 7-flowered, not longer 

 than the glume ; lower pale 5-veined, produced into an awn twice its length. (T) 

 Remarkably distinguished from all other grasses by its poisonous seeds. 1ST. Eng. 

 to Penn. July. Eur. 



51. TRIT'ICUM, L. WHEAT. (Lat. tritum, 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 ; palese 2, lower awned or mucronate ; scales 2, collateral. Fls. 

 arranged in spikes. 



TRITICTJM proper. (T) Glumes oblonsr, obtuse, ventricons-concave. Spike 4-sided No. 1 



AGROI-YEON, Kth. 2J Glumes lanceolate, pointed. Spikelets mostly 2-ranked Nos. 2, 3 



1 T. vulgare Villars. 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. (3) and This is without doubt the most valuable plant of QIC 

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

 farmers, classed as SUMMER WHEAT, and WINTER WHEAT ; AWNED or AWNLESS. 



/?. COMPOSITUM. EGYPTIAN WHEAT. Spike compound. Spikelets awned. 

 2 T. rdpens L. COUCH-GRASS. QUICH GRASS. Culm trailing at the lower 



