586 
GRAMINEJE. (GRASS FAMILY.) 
the interior. Aug. — Leaves 2° - 4° long. Spikes 2' - 3' long, straw- 
color. Glumes strongly serrulate-hispid on the keel; the awn of the 
upper one about long. Pale® somewhat unequal. — Certainly dis¬ 
tinct from the next, to which, in strictness, theLinnaoan name belongs. 
2. S. polystacliya, Willd., Muhl. (Great Salt Reed- 
Grass.) Culm tall and stout (4°-^ high, often 1' in diameter near 
the base) ; leaves broad to V), roughish underneath , as well as the 
margins ; spikes 20 - 50, in a dense oblong raceme (purplish) ; glumes 
barely mucronate , the lower half the length of the equal palea , of which 
the rough-hispid midrib of the lower one reaches to the apex. (Tra- 
chynotia polystachya, Michx. Dactylis cynosuroides, L.! excl. syn. 
Gronov., fyc.) — Salt or brackish marshes, within tide-water. Aug. 
* * Styles nearly separate: leaves, racids, fyc., very smooth. 
3. S. juncea, Willd. (Low Rush Salt-Grass.) Culms low 
(1° - 2° high) and slender ; leaves narrow and rush-like, strongly invo¬ 
lute ; spikes 1-5, short-peduncled, at least the lower; glumes acute, 
rough-serrulate on the back; the lower scarcely £ the length of the 
upper, not half the length of the lower palea. (Dactylis patens, Ait.) 
— Salt marshes and sandy sea-beach, common. August. 
4. S. glabra, Muhl. (Smooth Salt-Marsh Grass.) Culms 
thickish and rather succulent (3?—5° high); leaves elongated,flat (3 ,f - 
4 ,; wide at the base), but soon involute towards the long-tapering point, 
perfectly smooth on the edges, the uppermost overtopping the 4-13 
erect sessile spikes ; glumfts pointless, very minutely bristly-ciliate on 
the keel; the upper £ to ^ longer than the lower, slightly exceeding 
the almost equal pale®. (S. lavigata, Willd . — I do not adopt the 
name of S. alterniflora, Loisel., not being certain that it is our plant, 
since Trinius says the leaves are 44 margine hispidula.”) — Muddy 
salt and brackish marshes, common on the coast. Aug. — Odor 
strong and rancid. Spikes 2' - 3' long; the spikelets either close or 
rather remote. 
16. BOUTELOUA, Lagasca (1805). Atherop6gon ,Muhl 
Spikelets of one, or rarely 2-3, perfect flowers, and a neutral 
terminal rudimentary one, crowded and closely sessile in a short 
spike on one side of a flattened rachis: the spikes in a siropl 0 
spiked raceme. Glumes concave-keeled, the lower one shorter. 
Lower palea 3-nerved, 3-toothed at the apex, the upper 2 -nerved 
and 2-toothed ; the nerves projecting into mucronate points, or in 
the short-pedicelled abortive flower into bristles or awns. Sta¬ 
mens 3. (Probably named after some Spaniard.) 
1. B. racemosa, Lag. Culms erect, in tufts (1°- 3 s high); 
sheaths commonly hairy; leaves narrow, taper-pointed; spikes liu* 
