620 GRAMINE^. (grass FAMILY). 



(Trachynotia polystacliya, ^fichx. Dactylis cynosuroides, L..' in part, excl. 

 var.) — Salt or hiiukisli marshes, within tide-water, especially southward. 



3. S. jlincea, Willd. (Uusii Salt-Grass.) Culms low (1° -2° hii;h) and 

 slender; leaves nuirow and rush-Uke, stronrjii/ involnte, verij smooth ; spikes 1 -5, on 

 very short peduncles ; the rhachis sinooth ; yluines acute, the lower scarcely half 

 the len},'th of the upper, not half the length of the lower palet. (Dactylis pa- 

 tens, .4 iV.) — Salt uiarshcs and sea-beaches. Aug. (Eu.) 



» * Spikelcts looseli/ hnbriratr-d, or somewhat remote, and alternate, the keels onli/ sliqhlli/ 

 hairy or lonrjliish under a lens: spikes sessile and erect, sojl: leaves, rhachis, ^c. 

 very smooth : ciilm_ rathei' succulent. 



4. S. Striata, Roth. (Salt Marsh-Grass.) Culm l°-4° high, leafy 

 to the top ; leaves soon convolute, narrow ; spikes few (2-4), the rhachis slightly 

 projecting at the summit beyond the crowded or imbricated spikelets : glumes 

 acute, very unetjual, the larger 1 -nerved, a little longer than the palcts. — Salt 

 marshes, Pennsylvania, &c. {Muhl ) — Odor strong and rancid. (Eu.) 



Var. glabra. (S. glabra, ^l/w///., partly.) Culm and leaves longer ; spikes 

 5- 12 (2' -3' long) ; spikelets imbricale-crowded. — Common on the coast. 



Var. alternifldra. (S. alterniHora, Loisel. Dactylis cynosuroides, var., 

 L.) Spikes more slender (3' -5' long), and the spikelets remotish, barely over- 

 lapping, the rhachis continued into a more conspicuous bract-like appendage: 

 larger glume indistinctly 5-ncrved (not so evidently as in the European and 

 Tropical American plant) : otherwise as in the preceding form, into which it 

 passes. — Common with the last: also Onondaga Lake, J. A. Paine. 



18. CTENIUM, Panzer. Tootiiachi;-Grass. (PI. 9.) 



Spikelets densely imbricated in two rows on one side of the flat curved rhachis 

 of the solitary terminal spike. Glumes persistent : the lower one (interior) much 

 smaller; the other concave below, bearing a stout recurved awn, like a horn, on 

 the middle of the back. Flowers 4-6, all but one neutral ; the one or two lower 

 consisting of empty awned palets : the one or two uppermost of empty awnless 

 palets : the perfect flower intermediate in position ; its palets membranaceous, 

 the lower awned or mncronate below the apex and densely ciliate towards the 

 base, 3-nerved. Squamulae 2. Stamens 3. Stigmas plumose. (Name Krepioif, 

 a small ronih, from the pectinate appearance of the spike.) 



1. C. Americanum, Spreng. Culm (3° -4° high from a perennial root) 

 simple, pubescent or roughish ; larger glume warty-glandular outside and con- 

 spicuously awned. (Mon<5cera aromatica. Ell.) — Wet pine barrens, S. Virginia 

 and southward. — Taste very pungent. 



19. BOUTELOITA, Lagasca (1805). MtisicfT-GRASS. (PI. 9.) 



Spikelets crowded and closely sessile in 2 rows on one side of a flattened 

 rhachis, comprising one pcri'ect flower below and one or more sterile (mostly 

 neutral) or rudimentary flowers. Glumes convex-keeled, the lower one shorter. 

 Perfect flower with the 3-nerved lower palet 3-toothed or cleft at the apex, the 

 2-nervcd upper palet 2-tootlicd ; the teeth, at least of the former, pointed or sub- 



