547 
branches : spikelets 2 to 4-flowered, 5 to 8 mm. long, the florets rather loose on the 
elongated rachilla; floral glume obtuse, pubescent below the middle. (Poa flexruosa 
Muohl. non L.)—Dry woods, central Texas to Pennsylvania. 
68. PANICULARIA Fabr. 
Spikelets 4 to 15-tlowered, slightly compressed, linear or oblong, 
smooth or slightly hispid, awnless, in narrow or open spreading pani- 
cles: empty glumes unequal, persistent, thin, one-half as long as the 
adjacent florets; floral glumes herbaceous, membranaceous at the 
obtuse apex, 7 to 9-nerved, nearly equaled or slightly exceeded by 
the bidentate palet: grain linear or fusiform, narrowly channeled. 
—Rather coarse broad-leaved grasses, the florets early deciduous. 
(Glyceria KR. Br.) 
1. P. fluitans (L.) Kuntze. (MANNA Grass.) Culms about 1m. high: panicle, 
slender, erect or somewhat speading: spikelets 7 to 13-tlowered, linear, 1 to 2 em. long; 
floral glume shorter than the bidentate palet. (/estuca fluitans L. Glyceria fluitans 
R. Br.)—Shallow water, rare in Texas, more common northward. 
2, P. nervata (Willd.) Kuntze. (NERVED MANNAGRASS.) Culms5to 10dm. high, 
leafy: panicle open and spreading or the slender branches often drooping: spikelets 
4 to 7-tlowered, 3 to 5 mm. long; floral glume prominently nerved, slightly exceeding 
the palet, (Poa nervata Willd. Glyceria nervata Trin,)—Wet land, rare in Texas. 
69, FESTUCA L. 
Spikelets 4 to 15-flowered, perfect except the glumiferous rudiment, 
compressed, short-pedicelled or nearly sessile in narrow or open spread- 
ing panicles: empty glumes, acute, narrow, unequal, about one-third 
shorter than the adjacent florets; floral glumes herbaceous or coriace- 
ous, obscurely 5-nerved, hispidulous, slightly pubescent or smooth, acute 
or awned, convex, often involute; palet bidentate, nearly equaling the 
glume: grain narrowly linear or fusiform, chammelled, usually adhering 
to the enveloping glume and palet.—Erect simple-stemmed grasses. 
* Panicle narrow: spikelets short-pedicelled or sessile; floral glumes narrow, invrolute, 
bristle-pointed or awned : leaves short, involute. 
1. F. octiflora Walt. (SLENDER FESCUE.) Culms2 to4dm. high: panicle narrow, 
subspicate or rarely with the lower branches spreading: spikelets 8 to 12-flowered, 
6 to 8 mm. long; floral glumes hispidulous, tapering into a short awn or awnless.— 
(F. tenella Willd. )—Dry hills throughout Texas and common throughout the southern 
United States. War. AaRIsTULATA Torr., of the same range, has awns equaling or 
somewhat exceeding the florets. 
” F sciurea Nutt. Culmsslender, weak, 1 to3dm. high: panicle 1 to 2 dm. long, 
with erect or slightly spreading, closely flowered branches: spikelets 4 to 5 mm, 
long, 4 to 6-flowered; floral glumes pubescent, tapering into an awn two or three 
times as long as the glume.—Central Texas to Mississippi. 
** Panicle open: spikelets distinctly pedicelled: floral glume broad, not invalute, awnless: 
leaves broadly linear. 
+ Florets rather narrow, bristle-pointed, 
3. F. Texana Vasey. Culms4to8 dm. high: branches of panicle mostly in twos, 
rather rigid or slightly flexuous, few-flowered toward the extremities: spikelets 4 to 
