co n 
552 GRAMINEJE. (GRASS FAMILY.) 
6. A. arachnoides, El. Culms and leaves very slender; panicle con- 
tracted, weak and drooping; glumes nearly equal, lanceolate, rough on the keel 
and margins; upper palea minute, the lower with two minute bristles at the 
truneated apex, and a long and very fine awn on the back above the middle. — 
Near Orangeburg, South Carolina, Elliott, and westward. April and May. Y 
— Culms 1? high. 
8. POLYPOGON, Desf. Bearp-Grass. 
Flat-leaved chiefly annual grasses, with the 1-flowered spikelets stalked, and 
crowded in close clusters into a terminal spiked panicle. Glumes 2, equal, awned, 
and much longer than the paleze, of which the lower one is truncated and toothed 
at the apex, and often short-awned. Stamens 3. Stigmas 2. Grain elliptical, 
free, 
. 1. P. maritimus, Willd. Culms simple (6/—8' high) ; glumes pubescent, 
hispid on the keel, one third as long as the slender awns; lower palea 4-toothed, 
unawned.  (Phleum pratense, Ell., Herb.) — Sea-shore of North and South 
Carolina. Introduced. 
9. CINNA, L. 
Tall perennial grasses, with broad leaves, bearing the 1-flowered compressed 
spikelets in a large compound terminal panicle. Glumes unequal, lanceolate} 
acute, the sharp keel hispid-serrulate. Pales 2, raised on a stalk, smooth, the 
lower one short-awned on the back below the apex. Stamen 1. Grain linear- 
oblong, free. 
1. C. arundinacea, L. Culms (29-79 high) simple; leaves Jinen 
lanceolate (3^ wide); branches of the panicle in fours or fives, erect in fruit; 
spikelets often purplish (2}/’-3"' long). — Shaded swamps, Georgia, and north- 
ward. — Panicle 6’- 15! long, rather dense. — Var. pexpuLa, Gray. Culms and 
branches of the drooping panicle more slender; pedicels very rough; spikelets 
smaller; glumes and pale thinner. — Mountains of North Carolina, Cuts — 
10. MUHLENBERGIA, Schreb. Dror-seep Grass. 
Spikelets 1-flowered. Glumes persistent, pointed or awned, equal, or e. 
lower one smaller. Pales 2, sessile in the glumes, commonly hairy at the bene 
deciduous with the enclosed grain; the lower one 3-nerved and mucronate or 
awned at the apex. Stamens 3. s 
$1. MUHLENBERGIA Pxorzn. — Spikelets commonly much crowded, in 
~ eral and terminal panicles, short-stalked : culms branching : leaves. Be c 
Mexicana, Trin. Panicles oblong, dense; glumes br c pnt 
