804 ORDEK 156. GRAMINE^E. 



glumes linear, pungent ; awn of the fl. 3 to 4 times its length, that of the rudi- 

 ment half as long. y Sandy fields, N. J. to Ga. and La. 



2 G. brevifolium Trin. Culm slender, decumbent below, ascending 8 to 16' ; 

 internodes short (!'), sheaths about as long, smooth; Ivs. linear-lanceolate, 1 to 

 2', very acute ; spikes almost hair-like, somewhat corymbed, flowering only above 

 the middle i glumes subulate; awn of the flower as long as the pale, that of the rw- 

 diment wanting. If Md. to La. (Hale). 



55. MANISITRUS, L. LIZARD-TAIL GRASS. (Gr. ju<mf, lizard, ovpd, 

 tail.) Spkl. in pairs, 1 -flowered, the lower $ , upper abortive ; $ gl. 2, 

 the lower roundish, saccate-concave, coriaceous, larger than the flattish, 

 membranous upper gl. ; pales 2, much smaller than the glumes, thinly 

 membranous ; stam. 3 ; styles 2 ; abortive spkl. of merely 2 empty, 

 subequal, subcoriaceous glumes. 



M. granularis Swtz. Culm 2f or more, erect, branching, with hairy sheaths; 

 leaves flat, 1 to 4' in length; spikes solitary, on short, lateral branches, partly 

 involved in a spath-form leaf, jointed, unilateral, -J to 1' long, colored ; $ fls. 

 globular, the gl. warty-tesselated. About Charleston, S. C. (Bachmau !). E. 

 Ind. 



7 O 



upper pale 

 the upper 



56. CYN'ODON, Rich. BERMUDA GRASS. (Gr. vwv, a dog, odog, a 

 tooth ; alluding to the singular one-sided spikelets.) Spikes digitate or 

 fasciculate ; spikes unilateral, in a single row, 1 -flowered, with a rudi- 

 ment, glumes membranaceous, shorter than the flowers, persistent ; 5 



lea bifid-toothed ; rudiment minute, pedicellate, in a groove of 

 upper palea ; ecales truncate. 

 C. Dactylon Pers. Culm creeping extensively; stolonilbrous at base, 6' to 

 2f long ; Ivs. hairy on the margin and towards the base, narrow-linear ; sheaths 

 hairy; spikes 4 5, digitate, spreading, 2 3' long, 1'' wide, serrated with the 

 uneven spikelets; glumes scabrous on the keel, lanceolate, acute ; palese subequal. 

 the lower broader, enfolding the upper. y. A vigorous creeper, in sands and hard 

 soils, Penn. to the Gulf. 



57. EITSTACHYS, Desv. SEA-SIDE FINGER-GRASS. (Gr. ev, well, 

 rrro^uf, a row.) Spikes digitate; spkl. sessile on one side of the rachis, 

 2-flowered ; upper fl. sterile ; upper gl. larger, short-awned at the 2- 

 lobed apex ; lower pale thin, keeled, mucronate below the tip. Zf Culm 

 creeping, compressed. Lvs. flat. 



E. petreea Desv. Diffusely branched ; rooting at the joints ; Ivs. linear, ob- 

 tuse. rough-edged, 2 4' ; sheaths compressed, keeled, serrulate on the keel ; 

 longer than the joints ; spikes strict, erect, fascicled, 4 to 6 ; lower 5 pale coria- 

 ceous, brown, silky-ciiiate on the keel below and margins above, the midvein 

 extended into a short subterminal awn. Brackish soils, S. Car., Ga. (Bachman). 

 Jn. Aug. (Chloris, Ell.) 



58. ELEUSrNE. (From Eleusis, where Ceres, the goddess of har- 

 vests, was worshipped.) Spikes digitate, unilateral ; spikelets 5 7- 

 flowered ; glumes obtuse, unequal, lower one smaller ; palese unequal, 

 upper one bifid toothed ; scale truncate, fimbriate ; caryopsis triangu- 

 lar, ovate, enclosed in a separate membrane or perigynium. 



E. Indica L. Culm oblique, compressed, procumbent and branching at base, 12 

 16' long ; Ivs. linear, somewhat hairy, on smooth, loose sheaths hairy at the throat ; 

 spikes 2 4, rarely more or less, linear, straight divaricate, 2 4' long; 2" wide ; 

 spikelets closely imbricate, smooth; upper glume 6-veined; fr. dark brown. Q, 

 Common about houses, foot-paths, &c. Mid. and "W. States. Aug. 



59. DACTYLOCTE X NIUM, Willd. EGYPTIAN GBASS. (Gr. cfcfeTvAof, 



finger, Kreviov, a small comb ; sc. spikes digitate, pectinate.) Spikelets 



