580 
GRAMINEJE. (GRASS FAMILY.) 
* Lower palea barely mucronate or sharp-pointed. (Cinna, sp., Kunth.) 
1. SOl>Olifera. Culms ascending (1°- 2° high), sparingly 
branched; the simple contracted panicle very slender or filiform; 
glumes barely pointed, almost equal , J shorter than the equal palea ; 
lower palea abruptly short-mucronate. (Agrostis, Muhl.) — Open 
rocky woods, from Vermont southward. Aug. — Spikelets less than 
l ff long. 
2. M. gloincrfala, Trin. Culms upright (1°-2° high), spar¬ 
ingly branched or simple ; panicle oblong-linear, contracted into an in¬ 
terrupted glomerate spike , long-peduncled, the branches sessile; glumes 
atoned , nearly equal, and (with the bristle-like awn) about twice the 
length of the unequal very acute paleae. (Agr. racembsa, Michx. A. 
set6sa, Muhl. Polyp6gon racemosus, Nutt.) — Bogs, &c., common 
northward. Aug. — Panicle 23' long. 
3. M. MexicaJia, Trin. Culms ascending, much branched 
(2P-3P high); panicles lateral and terminal, often included at the 
base, contracted, the branches densely spiked-clustered , linear (green and 
purplish) ; glumes awnless , sharp-pointed , unequal, the upper about 
the length of the very acute lower palea. (Agr. Mexickna, L. A. 
lateriflora, Michx.) — Varies with more slender panicles (A. filifor- 
mis, Muhl.) — Low grounds, common. August. 
* * Lower palea bristle-atoned from the tip: flowers short-pedicelled. 
4. M. sylv&tica, Torr. & Gr. Culms ascending, much 
branched and diffusely spreading (2P-4°long); contracted panicles 
densely many-flowered ; glumes almost equal , bristle-pointed , nearly as 
long as the lower palea, which bears an awn twice or thrice the length 
of the spikelet. (Agr. diffusa, Muhl.) — Low or rocky woods, com¬ 
mon. Sept.— Aspect between No. 3 and No. 5. 
5. Iff. Willdendvii, Trin. Culms upright (3° high), slen¬ 
der, simple or sparingly branched ; contracted panicle slender , loosely 
flowered ; glumes slightly unequal, short-pointed, half the length of the 
lower palea, which bears an awn 3-4 times the length of the spike- 
let. (Agr. tenuiflbra, Willd.) — Rocky woods, rather common. Aug. 
6. UI. diffusa, Schreber. (Drop-seed. Nimble Will.) 
Culms diffusely much branched ^-lS' high); contracted panicles 
slender, rather loosely many-flowered, terminal and lateral; glumes 
extremely minute, the lower obsolete, the upper truncate ; awn once or 
twice longer than the palea. (Dilepyrum minutiflorum, Michx.) 
Dry hills and woods, from S. New England to Wisconsin. Aug., Sept. 
— Spikelets much smaller than in the foregoing, 1^ long. 
§2. Trich6chloa, DC. — Panicle very loose and open, the long 
branches and pedicels capillary. 
7. Iff. capillaris, Kunth. (Awned Hair-Grass.) Culm 
simple, upright (2° high); panicle capillary, expanding -W ion S J 
