Oedeb 156.— GRAMINE^. 805 



2 to CD-flowered, arranged in several unilateral, digitate spikes ; glumes 

 carinate-compressed, the upper awned ; pales membranous, the lower 

 carinate-boat-shaped, acute-mucronate ; stamens 3 ; caryopsis free, 

 glabrous. 



D. Egypticunx Willd. Culm geniculate and rooting below, ascending If to 

 18' ; sheaths half as long as the internodes, amoothish; Ivs. ciliate at base, 6' hj 

 3", more or less; spikes usually 4 (oarinate), rachis muorouate at the naked tip; 

 spikelets 3-flowered, the upper sterile. — Q Fields, common, Va. to Fla. Jl. — Oct 



60. SPARTFNA, Scbreb. Marsh Grass. (Gr. anapriov, a rope ; 

 from 'the resemblance of the creeping rhizomes?) Spikes imbricated 

 in a double row on one side of the rachis, strictly 1-flowered, no rudi- 

 diment ; gl. laterally compressed, carinate, coriaceous, pointed or awned, 

 unequal; pales subequal, awnless ; style or styles very long. — 2^ Eigid, 

 chiefly maritime. Spikes in a raceme. 



5 Spikelets with the upper glume decidedly awned nnd hispid No. I 



§ Bpjkelet unawned, •r merely mucronate. — Styles united : Nos. 9 



— Styles distinct Nos. 8, 4 



1 Ii. cynosuroides WiUd. Culm slender, smooth, 3 to it; Ivs. 2 to 4f long, 

 sublinear, convolute and filiform at the end ; sheaths striate, glabrous ; pan. loose, 

 slender, composed of 5 to 12 alternate, one-sided, pedunculate spikes 2 to 3' long; 

 spkl. subloose-imbricated ; gl. acuminate, one of them with an awn about its own 

 length, the other about equaling the white pales. — Marshes, Can. to Pla. and west- 

 ward, about salt licks 1 A coarse, sedgy grass, not valuable. 



2 S. polystdchya Willd. Culm stout, thick, 4 to 8f, erect, smooth ; Ivs. smooth, 

 long, broadly linear; spikes numerous (20 to 60), stifii suberect, subsessile; spike- 

 lets coriaceous ; upper gL barely mucronate, little longer than the unequal pales, 

 twice longer than the subulate lower glume. — Marshes, chiefly southward. The 

 hollow culm is often 8 or 9" thick. 



3 S. jrincea "Willd. Et. creeping extensively; culm -elender, smooth, 1 to 2^ 

 erect, rigid ; Ivs. convolute, setaceous above ; rigid ; sheaths very long ; spikes 

 few (3 to 6) 1' or more long, dense, subsessile; fls. awnless; gls. very unequal, 

 the upper little exceeding the pales, thrice longer than the lower glume ; the long 

 styles scarcely united. — Marshes along the coast. 



4 S. alternifolia Loisel. Soft Marsh Grass. Cvilm succulent, terete, 3 to 5f, 

 erect from long creeping roots ; Ivs, channeled, very smooth, continuous with the 

 open sheaths, often exceeding the culm ; spikes 6 to 12 or more, Oppressed, ses- 

 sile, the rachis of each produced beyond the fls. to a subulate point ; gls. very 

 unequal, upper near twice longer, acute ; sty. nearly distinct. — Salt marshes. It 

 is greedily eaten by cattle, has a strong, rancid smell and affects the milk mada 

 of it. (Elliott). (S. glabra Muhi) 



61. BOUTELOU'A, Lagasca. Spikelets sessile, in unilateral short 

 spikes ; glumes carinate, the upper one larger, shorter than the several 

 flowers ; lower flower perfect, upper ones abortive ; lower pale 3-oleft, 

 segments subulate, mucronate, in the ii fl., conspicuously awned in the 

 short-stalked sterile ones ; stamens 3. (Atheropogon, Muhl. Eutriana, 

 Trin.) 



6 Spikes 20 to 40, very fihoit. In one long, unilateral raoemo V^o" I 



I Spikes 1 to S, longer, many-flowered, eubterminal Nos. 2, 8 



1 B. curtip^ndula Gray. Culm 1 to 2f high, geniculate at base, ascending; 

 terete ; Ivs. linear-lanceolate, smoothish beneath, pilous above ; lig. short, trun- 

 cate- spikes 4 to 6" long, 20 to 40, on short, fiat ped., thinly arranged in 2 lat^ 

 eral 'rows, each with 4 to 8 spikelets; spkl. 2-flowered arranged in 2 rows on the 

 under side of the flat, partial rachis; gls. unequal, the lower awn-like and slightly 

 adhering to the rachis; anth. 3, bright red; tr. oblons; abortive fi. with its mid- 

 dle awn conspicuous.— y Mid. and W. States. Guilford Conn. (Robbins). (A. 

 apludioides MuhL Chloris curtipendula Mx.) 



