108 POACEAE 
Awn Bu below at maturity, bent, exserted: leaf-blades fili- 
or 1. A. flexuosa. 
Awn not ‘twisted, straight, not much exserted : leaf-blades 1.5-3 
m. 
e, flat or folded, firm 2. A. caespitosa. 
1. A. flexu es Stems d slender, 30-80 em. tall: leaves sud basal, 
the blades 5-90 em. long, the sheaths scabrous: panicle 5-12 em. long, open; 
spikelets 4-5 mm. long, pu ie lum 
te: -7 mm. long, attached near the 
a ane twisted. [D. flexuosa Trin. | 
voods y banks, ee and 
ary des, Blue Midge, IN. C. o Tenn., and 
S prov , Va. to Wis. pes New 
2. A. caespitosa L. Stems tufted, 60—120 
em. tall: t nicis 10-20 em Py p spikelets 
about 4 mm. long, pale: nly a little 
longer than the lemma, straight, articulate 
the base, deciduous. [D. caespitosa 
oist 
Newf.— (Eu. )—The former definite inclu- 
sion of this eae in our range may have 
been an error 
. ASPRIS Adans. Annuals with pale shining spikelets in narrow or 
open panicles. Spikelets 2-flowered, articulate above the glumes, the rachilla 
not prolonged: glumes about equal, acute, membranaceous, or subscarious:.lem- 
mas firm, rounded on the back, tapering into 2 slender teeth, bearing on the 
back below the middle a slender geniculate twisted usually exserted awn, this 
rarely wanting in the lower floret or reduced, the callus with a very short tuft 
GRASS 
of hairs.—Nine species, natives of Europe.—HAIR-GRASSES.  WIND-G 
Lower floret awned, the awn as ORE as that of the upper floret. 1. A. cn AT iie eds 
Lower floret awnless or nearly s 2. A. capillar 
A. ee (L.) Nash. Stem delicate, less than 20 em. tall: panicle 
open l5 the height of the plant, the capillary branches spreading: 
rds ph toward the ends of the ! 
branehes, 3 mm. long: teeth of lemma 
o us.— (SILVERY HAIR-GRASS.)—Waste- 
places, fields, bur and roadsides, various 
provinces Fla. La. Ohio, and Mass.; 
on the bus Coast. Nat. of Eu. 
A. capillaris (Host.) A. Hitche. Similar 
to A. caryophyllea: dare sg peta jd ae 
ends of the branches, 2.5 m ong: 
of lower floret with ack. teeth, of "the 
upper floret with i, teeth.—W aste- 
places, various provinces, Fla. to La., Calif., 
N. J., and M Nat. pu Eu. 
TRISETUM Pers. Tufted perennials with flat blades and open or 
TR e or spike-like panicles. Spikelets 2-flowered, sometimes 3- 
to 5-flowered, the rachilla prolonged boum d the upper floret, usually villous; 
glumes ined S unequal, aeute, awnless, the second usually longer than the 
