51% ; 
longer than the floret, hispid, long awned; floral glume sessile, smooth 
at the base, toothed and bearing a short deciduous awn; palet wanting; 
lodicules two, nearly as long as the floral glume. 
1. P. paniceum (L.) Lag. (ANNUAL BEARD-GRASS.) Culms 2 to 4 dm. high, 
decumbent and geniculate below: panicle 3 to 10 cm. long, sometimes interrupted 
below, soft and yellow: spikelets about 2 mm. long; awns of empty glumes 3 to 4 
times as long. (Cynosurus paniceus L. Polypogon monspeliensis Desf.)—Edges of 
ponds and streams, Texas to California, 
31. LIMNODEA nom. nov. 
Spikelets 1-flowered with a very small awn-like pedicel or rudiment 
of a second, terete, short-pedicelled, in a loose narrow panicle: empty 
glumes equal, coriaceous, subinvolute; floral gluine nearly as long as 
the empty glumes, chartaceous, oblique at the 2-toothed apex, awned 
from the sinus; palet shorter than the glume, membranaceous,  (Thur- 
beria Benth. Jour. Linn. Soc. xix 58, 1852, non Gray 1854.) 
1. L. Arkansana (Nutt.) Culms slender, 3 to Gdm, high: leaves flat, lance-linear: 
panicle somewhat flexuous, 1 to 2 dm. long: spikelets nearly 4 mm. long; empty 
glumes finely pubescent; awn twisted, about 1 cm. long. (Greenia Arkansana Nutt. 
Thurberia Arkansana Benth,.)—Dry land throughout Texas. 
32. SPOROBOLUS R. Br. (DROPSEED GRASS.) 
Spikelets 1 (rarely 2)-flowered, in a narrow subspicate or open spread- 
ing panicle, awnless: empty glumes usually persistent, shorter than the 
floret, more or less unequal, 1 to 3-nerved, thin, herbaceous or membrana- 
ceous; floral glume of the same texture, 1 (or obscurely 3)-nerved; palet 
similar in texture or thinner, 2-nerved: seed often in a loose hyaline 
pericarp: mostly perennials with wiry or reed-like stems and more or 
less involute leaves. 
*Panicle contracted, narrow and spikelike. 
+ Culms erect or ascending. 
++ Panicle single and terminal, exserted. 
1. S.Indicus(l.) R.Br. (SmutT-Grass.) Culms 4 to 8 dm. high simple: leaves 
narrow, involute, nearly smooth, 3 to 6 dm. long: panicle very narrow, dense orsome- 
what interrupted below, 2 to3dm. long; branches erect, densely flowered to the base, 
8 em. long or less: spikelets about 1.5 mm. long; empty glumes obtuse; the second 
nearly twice as long as the first and two-thirds as long as the floret; floral glume 
acute, I-nerved: grain readily separating from its loose coat, 1mm. long, neavly 
equaling the spreading glume and palet. (Agrostis Indica L..)—Introduced in rather 
moist land throughout the southern United States. Often attacked by a fungus, 
hence the common name. 
2. S. Virginicus (L.) Kth. Culms 3 to 6 dm, high, ascending or decumbent and 
much branched below, froma running rootstock: leaves distichous, short, convolute: 
panicle 3 to 6 cm. long, dense: spikelets 2 to 3 mm. long; empty glumes acute, 
1-nerved, subequal and nearly as long as the floret; floral glume acute, l-nerved: 
grain Lim. long, shorter than the floret. (-lgostis Virginica L,)—Salt marshes, Texas 
and eastward. 
3. S. ligulatus Vasey & Dewey. Culms 3 to 5 din. high, slender, simple, from 
knotted rootstocks: leaves narrow, flat or convolute, 1 to 3 dm. long; ligule 4 to 6 dm. 
