552 GUAMINlCli:. (gKASS lAMILV.) 



G. A. nrachnoidos, Ell. Culms and loaves very slendiT ; panido con- 

 tr:icti-t!, wi'uk iiiul ilroopiiii^ ; gluiiu-s nearly e(|ual, lanceolate, rou'j;!! on llic keel 

 and niar;.Mns; ni)i)er paleii minute, the lower with two minute bristles nt the 

 truneated apex, and a lonjj and very fine awn on the hack nhove the middle. — 

 Near ()ran>;ehur{^, South Carolina, Elliott, and westward. Ajjril and May. Ij. 

 — Culms \° high. 



8. POLYPOGON, Dcsf. Be-vud-Grass. 



Flat-leaved cliielly annual j^rasf^es, wiili the 1-flowcred spikelcts stalked, and 

 crowded in close clusters into a tcrminol spiked ])aniclc. Glumes 2, equal, awncd, 

 and much lonjrcr than the ))ale.T?, of which the lower one is truncated and toothed 

 at the ajjcx, and often short-awned. Stamens 3. Stigmas 2. Grain elliptical, 

 free. 



1. P. maritimus, AViUd. Culms .simple (6'- 8' high); glumes pubescent, 

 Iiispid on the keel, one third as long as the slender awns ; lower palea 4-toothed, 

 unawned. (Phlcum pratcnse, Ell., Herb) — Sea-shore of North and South 

 Carolina. Introduced. 



9. CINNA, L. 



Tall perennial grasses, Avith broad leaves, bearing the 1 -flowered compressed 

 spikclcts in a large compound terminal panicle. Glumes unequal, lanceolate, 

 acute, the sharp keel liispid-scrrulatc. Palea; 2, raised on a stalk, smooth, the 

 lower one short-awned on the back below tlie apex. Stamen 1. Grain linear- 

 oblong, free. 



1. C. arundinacea, L. Culms (2° -7° high) simple; leaves linear- 

 lanceolate (^' wide) ; branches of the panicle in fours or fives, erect in fruit; 

 spikclcts often purplisli (2i"-3" long). — Shaded swamps, Georgia, and north- 

 ward. — Panicle 6'- 1.5' long, rather dense. — Var. pendit-a. Gray. Culms and 

 branches of the drooping panicle more slender; pedicels very I'ough ; spikclcts 

 smaller; glumes and ])ulecc thinner. — Mountains of North Carolina, Curtis. 



10. MUHLENBERGIA, Schreb. Drop seed Grass. 



Spikclcts 1-flowcred. Glumes persistent, pointed or awncd, equal, or the 

 lower one smaller. Puleee 2, sessile in the glumes, commonly hairy at the base, 

 deciduous with the enclosed grain ; the lower one 3-nervcd and mucronate or 

 awned at the apex. Stamens 3. 



fj 1. MUHLENBERGIA Proper. — Spikiht!^ conimonli/ much crowded, in lat- 

 eral and ti-r ml mt I panicles, short-stcdked : culms branching: leaves Jiat. 



1. M. Mexicana, Trin. Panicles oblong, dense ; glumes unequal, lance- 

 olate, ending in slender hispid awn-like points, the upper one as long as the 

 awnless pale<E. ( Agrostis lateriflora, Michx.) — Damp soil. North Carolina, and 

 northward. June and July. — Culms ascending, much branched. 



2. M. Willdenovii, Trin. Culms sparingly branched, erect ; panicles 

 linear ; spikclcts scattered ; paleee twice as long as the nearly equal short-pointed 



