136 POACEAE 
lemmas rounded on the back, 5- to 7-nerved.—Eight species, natives of Eurasia. 
—RYE-GRASSES. DARNELS 
Glume equalling the uppermost floret: plant annual. 1. L.temulentum. 
Glume E PR the spikelet : plants perennial. 
Lemmas a 2. L. multiflorum. 
Lem Hs alee or nearly so. l 3. L. perenne 
1. L. ben L. Stem 60-120 em. tall: spike 10-30 cm. long: iid 
5—-7-flowered: 1 wned or awnless, plump.—(POISON-DARNEL.)— Was 
places, | dons provinces, Ga. to Tex., Kan., | ! 
and N. B. Nat. of Eu. 
2. L. multiflorum Lam. Stem 30-60 cm 
nearly throughout U. S; infrequent south- 
ward. Nat. of Eu. 
3. L. perenne L. Rese mbles L. multiflorum : 
ERENN 
and . waste-places, cult. eadow gra 
northern Wr pr eu ogee. bur locally naturalized. Nat. of Eu. 
97. AGROPYRON Gaertn. Our species perennials, with erect culms, erect 
spikes, and ereeping rootstocks. Lis c several-flowered, solitary, sessile, 
placed flatwise at loa joint of & contin 
ous rachis; glumes equal, firm, ie 
nerved, ine god than the first lemma, 
acute ned: lemmas convex on the 
. back, r veter firm, 5-7-nerved, usually acute 
or awned from the apex: palea shorter than 
the lemma.—Sixty species, natives of tem- 
perate regions generally.—W HEAT-GRASSES. 
QUITCH-GRASSES. QUICK-GRASSES. 
1. A. repens (L.) Beauv. Plant green or 
eeu peces about 5-flowered, 1-1.5 
em. long: glumes 8-10 mm. long, stro ngly 
with an awn about 5 m —(QUACK GRASS.)—Fields and waste-places, 
from N. C. northward ae ‘throughout the N U. S. Nat. of Eu.—(Mez.) 
98. HORDEUM [Tourn.] L. Low or rather tall annuals or perennials 
mita fiat blades and dense terminal cylindrical or bristly-bushy spikes. Spike- 
1-flowered, 8 together at each node of the articulate rachis, the middle one 
eae the others short-pedicelled, the rachilla disarticulating above the glumes 
and, in the central spikelet, prolonged behind the palea as a bristle, this some- 
times bearing a rudimentary floret: lateral spikelets reduced, imperfect; glumes 
S 
lemmas rounded on the back, 5-nerved, usually obscurely so, tapering into a 
usually long awn.—Twenty species, natives of the temperate region of both 
hemispheres.—BARLEY-GRASSES. DWARF-BARLEYS 
