82 POACEAE 
narrower, flat, fewer-nerved, its palea nearly as long, often subtending a 
j fertil l 
staminate ower: ertile lemma much 
smaller, d elliptie, pointe 
rate, the pa ns inrolled, the palea not 
enclosed at lise mit. e species, ex- 
cept the a confined to the tropics 
of both hemispheres. 
1. S. striata (L.) Nash. Plant 2 
often decumbent and peres at bas 
5, 
ate, 4— 
icle rather loose, 6-30 cm. long: 
Rs pe 4 mm. long. [Pani icum f 
gibbum Ell. S. gibba Nash |—Mar 
ditches, prairies, and ponds, Coastal Plain, Fla. to E Tex., Okla., and N. J. 
— (W. T.) 
30. OPLISMENUS Beauv. Freely branching, creeping a with 
slender erect flowering shoots, flat, thin, " neeolate or ovate leaf-blades, and 
several l-sided ded EDI GS: rather dist on a main axis. dada terete 
or somewhat laterally compressed, is solitary or in pairs in 2 rows, 
crowded or somewhat distant on one side of a narrow scabrous or hairy 
rachis: glumes about equal, emarginate or 2-lobed, awned from between the 
lobes; sterile lemma exceeding the glumes and fruit, notched or entire, mucro- 
ate or short-awned, inelosing a hyaline 
palea: fertile lemma elliptic, acute, convex 
or boat-shaped, the firm margins clasping 
the palea, not inrolled.—Ten species, except 
the following, confined to the tropics of 
both hemispheres 
setarius (Lam.) Roem. & Schult 
. m. e 
1-3 cem. long, 1 anceolate, conspicuous 
eae -margined: racemes 3-5, distant, 1-3 
. long, the bn usualy 2-5 mm. long, 
sometimes 1 em. long: the spikelets appear- 
—(W0OO0D-GRASSES.)—-Moist woods, sw 
awe and iw banks, Coastal Plain, Fla. to Tex. and N. C.— (IF. I., 
Mex. ys 
31. ECHINOCHLOA Beauv. Our species coarse, often succulent, annuals, 
with compressed leaf-sheaths, no ligule, linear flat blades and rather compact 
panicles composed of short densely flowered racemes along a m pike- 
ets plano-convex, often stiffly hispid, subsessile, solitary or in irregular clus- 
ters on one side of the panicle-branches; first glume not over half the length 
of the spikelet; second glume and sterile lemma equal, pointed, mucronate, 
or the side short-awned and the lemma long-awned, sometimes Ws cn d 
so, inelosing a membranaceous palea and sometimes a staminate flower; fertile 
lemma een -pointed, the margins inrolled below, flat above, fa aoe of 
