424 GRAMINEA 



River banks. Aug. Per. Culm 2 to 3 fret high, smooth. Leaves broadly linear, 

 flat, rough, deep green. Spike 3 to 5 inches long, stiffly erect, thick. 



2. E. Canadensis, L, Canadian Lyme-grass. 



Spike rather loose, curving, on an. exser ted. peduncle ; spikelets mostly in pairs of 

 3 to 5 long-awncd rough or rough-hairy flowers; glumes lance awl-shaped, tipped 

 with short awns. 



River banks, in rich soil. Aug. Per. Soot creeping. Culm 3 to 4 feet high, 

 erect. Leaves broad-linear, flat, somewhat rough. Spike 6 to 8 inches long, at 

 length nodding. A variety (E. glaucifolius of Muhl.) is pals or glaucous through- 

 put, with spreading awns \y 2 inch long. 



3. E. Hystrix, L. Bottle-brush Grass. 



SpiJce erect, loose; the spreading spikelets 2 or 3 together, early deciduous from 

 the joints, about 3-flowered; flowers smoothish, or often rough-hairy, tipped with 

 an awn thrice their length. 



Moist woodlands, common. July. Per. Culm 2 to 4 feet high, erect, smooth. 

 Leaves broad-linear flat, and with the sheaths smoothish. Spike 4 to C inches long, 

 at length spreading. 



4. E. striatus, Willd. Striated Lime-grass. 



Spike erect; spikelets in pairs, 2-flowered, awned, hispid ; glumes linear, nerved, 

 awned, nearly as long as the spikelets. 



Shady woods, June, rare. Per. Culm 8 to 12 inches high, erect, striate. Leaves 

 iunceolate, acuminate, rough above ; sheaths smooth. Leaves somewhat spreading. 



S3. HORDEUM, Linn. Barley. 



Tha ancient Latin name. 



Spikelets 1-flowered, with an awl-shaped rudiment on 

 the inner side, 3 at each joint of the rachis, the lateral ones 

 usually imperfect. Glumes side by side in front of the 

 spikelets, slender, awn-pointed or subulate. Palf^e 2, the 

 lower with a long awn, the upper 2-keeled, obtuse. Sta- 

 mens 3. — Spike dense, simple, the rachis often sepcrating 

 into joints. 



1. H. VULGARE, L. Common Barley. 



Calm smooth, 2 to 3 feet high; leaves lance-linear, keeled, nearly smooth ; sheaths 

 auricled at the throat; spike thick, about 3 inches long; spikelets all fertile, 1- 

 flowercd, with an awn- like rudiment at the apex of the upper paleoa ; glumes col- 

 lateral ; flowers in four rows. Ann. Extensively cultivated. May. 



2. H. DISTICHUM, L. Pico-rowed Barley. 



Calm 2 to 3 feet high ; leaves lance-linear, scabrous above ; sheaths auricled at 

 the throat; spike 3 to 4 inches long, linear, compressed ; lateral spikelets abortive, 

 awnless ; /rwrt arranged in two rows. Ann. more common in cultivation tLit 

 &L» former species. 



34. AIRA, Linn. Hair-grass. 



An ancient Greek name for Darnel. 



Spikelets 2-flowered, in an open diffuse panicle. Glumes 

 2, unequal ; about as long as the flowers. Pale^e. thin. and. 



