408 



ORDER 155. GRAMINE.E. 



awnless, lower carinate, upper bicarinate. Grain 

 ovate- triquetrous, free, loose in its pericarp. Lvs. flat. 



E. Indlca L. Culms clustered, ascending, 3612'; leaves 

 linear; ppikes (a) 24, rarely 1, linear, straight, spreading, 

 2- 4' by 2" ; spkl. (*) closely imbricated on the under side 

 of the rachis, smooth ; fruit brown. Waysides : com- 

 mon M., S-W. August. 



64. DACTYLOCTENIUM, Willd. EGYPTIAN G. Spikes several, 

 digitate, unilateral. Spkl. 2- oo-flwd. Gl. compressed-carinate, the upper 

 awned. Pales boat-shaped, acute-mucronate. Grain roundish, free. 



1>. Egypticum Willd. Culms creeping and ascending, 1 IK; Ivs. ciliate at base; 

 spikes commonly 4 (cruciate), pointed; spkl.3-flwd. (T) Fields : com. Va. toFla. 



65. SPARTINA, Schreb. MARSH G. CORD G. 

 Srkl. flat, 1-flwd., closely imbricated in a double 

 row on one side of the triquetrous rachis, forming 

 dense spikes. Glumes keeled, coriaceous. Pales 

 awnless. Style very long. 14 Rigid marsh grasses. 



* Upper glume decidedly awned. Lower pale rough- 



hispid on the keel No. 1 



* Glumes merely pointed... (o) 



a Lower pale rough-hispid on the keel Nos. 2, 3 



a Lower pale smooth. Spikes 112 Nos. 4, 5 



1 S. cynosiiroides Willd. Culm 2 4f, slender but 



firm : Ivs. long, narrow, involute-filiform above ; ppikes 515, in a raceme-like pam 

 cle, each 2 4' long; upper glume with its awn 8 -10'', lower glume and subequal 

 pales 45". Brackish soils. August. 



2 S. polystacliia Willd. Culm 4 8f, | 1' in diameter ; leaves broadly linear, flat ; 



spikes 2050, in a dense panicle, and 34' ; upper pointed gl. 6", lower gl. 23'-', 

 half as long as the equal pales. Salt marshes, chiefly southward. Aug., +(a,b.c) 



3 S. gracilis Hook. Culml 2f; Iv*. rolled, rigid, rush-like; spikes 15 30, very short 



($'), closely imbricated into a spike-form panicle. Swamps, Fla. July, August. 



4 S. juucea Willd. Culm 1 2f, slender; leaves rolled and rush-like or setaceous; 



ppikes 1 fi, subsessile, 1 H' long ; upper glume 4", lower H", palos 3" ; wholo 

 plant glabrous except the rough-keeled upper glume. Marshes along the coast. 



5 S. altemiflora Lois. Soft Marsh G. Culm 3 5f, juicy; leaves channeled, long ; 



spikes 3 12, sessile, appressed, their rachis produced and 

 pointed ; upper gl. lin., obtuse, smooth as well as the eu- 

 tiro plant ; lower i as long. Salt marshes. August. 



66. BOUTELOUA, Lagasca. MUSKET G. Spkl. 

 sessile in two rows on one side of the rachis, form- 

 ing dense spikes. Glumes keeled, the lower larger. 

 Flowers several, the lowest $ , the rest abortive. 5 

 Lower pale 3-toothed, upper 2-toothed. Abortive 

 flowers aw r ned. 



ATHEROPOGON. Spikes numerous and short, forming an 



erect, virgate, one-sided raceme ; epikelets 48 No. 1 



CaoNDRcteiuai. Spikes 1 or few, dense ; spkl. O) . . Nos. 2, 3 



