104 POACEAE 
. LIMNODEA L. H. Dewey. A slender annual, with flat blades and 
narrow loose panicles. Spikelets 1-flowered, articulate with the pedicel below 
the glumes, the rachilla prolonged behind 
the palea as a short slender bristle; glumes 
equal, firm; lemma membranaceous, smooth, 
. nerveless, 2-toothed at apex, bearing from 
tween the teeth nder bent ; 
twisted at base; ; palea a little Bonos e 
the pied —One species. 
L. arkansana (Nutt.) L. 
Stem tufted, 20-40 em. tall: ps yid 
or less dap db on both surfaces: 
m 
Dune 5-15 ong: spikelets 3.5—4 m 
long, the glumes hispidulous or hirsute 
>l [T arkansana 
hurberia 
Benth.]—Dry soil, prairies, river-banks, and 
sand-dunes, Coastal Plain, Fla. to Tex. 'and Okla. 
57. ug L. Tal perennials, with flat blades and large drooping 
panicles. Spikelets 1-flowered, articulate below the glumes, falling entire, the 
rachilla pro cane behind the palea as a minute bristle; glumes subequal, 1-3- 
nerved; lemma Similar to the glumes, nearly as long, 3-nerved, bearing a minute 
short straight awn just below the tip: palea apparently 1-nerved.—Three species, 
natives of North America.—REED-GRASSES. 
Spikelets 5 mm. long: panicle rather compact, the branches as- 
cending 1. C. arundinacea. 
Spikelets 4 mm. long: panicle loose, the branches flexuous, droop- 
ng. 2. C. latifolia. 
1. C. arundinacea L. Ste E em. tall: leaf-blades as much as 1.5 
wide, sca : panicle 15-30 m. long, niin o glumes iut 
e ist 
swamps, hillsides, and meadows, variou 
provinces, Ga. to Tex., S. D., and Me. 
2. C. Regs (Trev.) Griseb. Stem 60- 
120 em. tall: leaf-blades 10—14 mm. wide: 
panicle 15-30 em. dh i dad green, ‘‘awn 
of lem ne s 1 mm. lo ong; 
[C. arundi nacea pendula A. Gray]— MUR 
woods, stream-banks, and swamps, Blue 
Ridge and more northern provinees, N. C. 
to Colo, Alas., Ont., and Newf.—(Eu.) 
58. AGROSTIS L. Slender, tall or low, quim (one of our species 
annual), with glabrous stems s, flat or sometimes involute, scabrous blades and 
open or contracted panicles of small Ee Spikelets 1-flowered, the 
rachilla not prolonged; glumes equal or nearly so, acute or acuminate, cari- 
. nate, usually scabrous on the keel and sometimes on the back; lemma obtuse, 
usually shorter than the glumes and thinner in texture, awnless or dorsally 
