GRAMINE, (GRASS FAMILY.) 559 
9. L. dubia, Nees. Culms 2° high, slender; leaves elongated, filiform, 
with smooth sheaths ; spikes 6-10, somewhat corymbose ; spikelets distant on 
the filiform rachis, 6-flowered ; glumes lanceolate, nearly equal, serrulate on the 
keel, shorter than the awnless soon spreading flowers ; paleæ fringed on the mar- 
gins, the lower one truncate or emarginate. — South Florida. 
$2. DIPLACHNE. — Lower palea 2-cleft, 1 -3-awned. 
3. L. polystachya, Kunth. Culms $°-4° long, mostly prostrate and 
rooting at the lower joints, much branched; raceme partly included in the 
sheaths of the elongated leaves; spikes numerous, approximate, erect, 3!— 5/ 
long; spikelets lanceolate, 8 — 10-flowered ; glumes unequal, shorter than the 
flowers; lower palea hairy on the margins below, 3-awned; the lateral awns 
minute, the middle one about as long as the palea.  (Festuca polystachya, 
Michx.) — Brackish swamps along the coast, Florida, and northward, Sept. @ 
4, L. Domingensis, Link.? Culms erect, simple, straight and slender ; 
leaves narrowly linear or filiform, shorter than the culm ; spikes 6 — 12, scattered, 
exserted; spikelets lanceolate, 6 —8-flowered; glumes unequal, acute, rough- 
keeled; lower palea hairy on the margins, much longer than the single rough 
awn. — South Florida. Oct. — Culms 19 - 13? high. 
24. TRICUSPIS, Beauv. — gee ee 
Perennial grasses, with tall, erect, simple culms, from a thick ‘and poo root: 
stock, elongated rigid leaves, and ovate or lanceolate 5 — 7-flowered stalked spike- 
lets, disposed in a simple or compound open panicle. Glumes 2, smooth, emar- 
ginate, shorter than the crowded flowers. Palex 2, 2-cleft, the lower one shortly 
3-awned by the pereurrent hairy nerves, bearded at the base. Stamens 3. Grain 
obovate-oblong, free. 
1. T. sesslerioides, Torr. Panicle ample and diffuse, or contracted and 
erect, bearded in the axils; spikelets terete, lanceolate, mostly purple; lower 
palea with two awn-like teeth similar to the three short awns. ( Poa quinquifida, 
Pursh.) — Dry soil, Florida, and northward. Ang. and Sept. — Culms 39-59 
high. Sheaths often hairy. 
2. T. ambigua. Panicle short, nearly simple, spreading, smooth in the 
axils, clammy ; spikes ovate or roundish, compressed ; teeth of the lower palea 
obtuse, wider than the three short awns. (Poa ambigua, Ell.) — Low pine bar- 
rens, Florida to South Carolina. August. — Culms 2? —3? high. 
25. TRIPLASIS, Beauy. 
sera tufted Svista grasses, with branching culms, aristi leaves, 
and few 4-flowered purple spikelets, disposed in reduced lateral and terminal 
panicles. Flowers scattered on the slender rachis. Glumes 2, lanceolate, smooth. 
Pales 2, hairy on the margins; the lower one 2-cleft, with a bearded or plumose 
sni NE eth; the upper concave, 3-toothed. Stamens 3. Grain free. 
a, Beauv. Culms erect, 19 13? high ; leaves and sheaths - 
included ; awn of the lower palea plumose, much longer — 
