GRAMINEJE. 450 



ciliate, long, straight, erect. The native country of this highly valuable grain 

 is unknown. It has long been cultivated, and like the wheat, may be 

 considered naturalized. June. July. 



43. HO'RDEUM. 

 Spikelets 3 at each joint of the rachis, 1-flowered, the 

 lateral ones sonnetimes abortive; glumes 2, subulate, nearly 

 equal, awned ; paleae 2, lower lance-ovate, long-awned, upper 

 obtusely acuminate ; caryopsis adhering to the paleae. 



1. H. vulga're. Barlcij. 



Slcm smooth, 2 — 3 feel high ; leaves lance-linear, carinate, nearly smooth ; 

 5/ic«//(5 auriculate at the throat; sipikc thick, about 3 inches lonor ; spikrlets 

 all fertile, l-flowered, witli an awn-like rudiment at the base of the upper 

 palea ; glumes collateral, shorter than the flowers ; fruit arranged in 4 rov?8-. 

 Extensively cultivated. May. 



2. H. Di'sTicHUM. Tico-roiaed Barley. ^ 



Sicm 2 — 3 feet liigh ; leaves lance-linear, scabrous above ; sheaths auriculate 

 at the throat; spik' 3 — 4 inches long, linear, compressed ; lateral spikelets 

 aboflive, awnless ; fruit arranged in 2 rows. More common, and is generally 

 preferred for malting to the former species. June. 



3. FI. juba'tum. Squirrel-tail Grass. ' > 



Stem slender, round, smooth, simp]e,^irout 2 feet high; leaves broad-linear, 

 4 — 6 inches long, rough-edged, otherwise smooth as well as the sheaths ; 

 spikes 2 — 3 inches long ; spikelets with the lat^ral flowers neuter ; glumes 

 and 7vrt/c(E produced into fine, smooth awns 6 times as long as the flowers > 

 abortive Jlowcrs on short pedicels. Marslrcs. N. England. June. 



4 4. L O' L I U M . 

 Spikelets many-flowered, sessile, remote, with the edge to 

 the rachis ; glume to the lower spikelet single, to the terminal 

 one 2; paleae herbaceous, subcqual, lower^one short-awned 

 or mucronate, upper bilid-toothed. 



1- L. pere'nne. Darnel Grass. 



Smooth ; stem terete, 1 — 2 feet high ; leiives la^ice-linear, shining-green, on 

 striate sheaths with truncate stipules ; rachis flexuous, grooved, 5 — G inches 

 long; spikelets about 16, longer than the glumes, 7 — 9-llowered, alternate, in 

 two opposite rows ; lower palea 5-nerved, dipper with 2 prominent, rough 

 keels. Naturalized in meadows, cultivated grounds, &c. May — June. 

 2. L. temcle'ntum. Poisonmis Darnel. 



Stem terete, smooth, 2 feet high ; leaves lance-linear, rough-edged, and with 

 the sheaths smooth on the surface ; stipule truncate ; rachis flexuous, 4 — 6 

 inches long; spikelets much compressed, 5 — 7-flowereH, longer than the 

 glumes; lower palea 5-nerved. produced into an awn twice its length. Pie- 

 markably distintjnished from all other grasses by its poisonous seeds. July. 

 Ann. It is said by Muhlenberg to be naturalized in New England. 



45. E'LYMUS. 

 Spikelets 2 or more at each joint of the rachis, 2 — 6- 

 flowered; glumes 2, collateral, subcqual, subulate; paleae 

 lanceolate, lower one entire, mucronate or awned ; scales 

 ciliate. 



