GUAMINEyE. (grass FAMILY.) 583 



Smaller (2°- 4° hij^h) ; leaves and sheaths smooth ; panicle (G'- 12' lon<;) olilonf; ; 

 awns short and twisted. — Var. liRiiviiiAUUis. (K. hrcvil)arl)is, ^//c/(.f.) Smooth 

 or nearly so; raihis of the ot>Iong panielc roii^li (not wooUy) ; hairs of the in- 

 vohuTC shorter than the glumes. — Dry or wet soil, Florida to JJortli Carolina. 

 Sept. and Oct. 



2. E. StrictUS, Baldw. Culms, leaves, and sheaths smooth or slightly 

 roughened; panicle (10'- 15' long) spiked; involucre very short or none; 

 glumes rough ; awns straight. — River-hanks, Florida and the lower districts of 

 Georgia, and westward. Sept. — Culms 4° -8° high. Leaves 3" -6" wide. 

 Spikclets twice the size of the preceding. 



58. SORGHUM, Pcrs. 



Spikclets 2-3 together on the slender hranches of the loose panicle ; the lat- 

 eral ones sterile or a mere pedicel; the middle or terminal one fertile. Glimies 

 coriaceous or indurated, closely bearded, sometimes awnless. Otherwi.se like 

 Andropogon. 



1. S. avenaceum. Panicle erect; glumes yellowish, lanceolate, the 

 lower one hairy ; one palea to each flower, linear, ciliate ; awn rough, slender, 

 twice as long as the glumes ; sterile flowers reduced to one or two slender hairy 

 pedicels. (Andropogonavenaceus, j1//cAx. A ciliatus, /?//.) — Dry sandy soil, 

 Florida to North Carolina. Sept. H. — Culms (2° - 4° high) and leaves smootlv 

 Panicle oblong, 6' - 12' long. 



2. S. nutans. Gray. Panicle long and narrow, nodding ; glumes dark 

 brown, the upper sparingly, the lower densely hairy ; palea; of the upper flower 

 2, unequal ; awn 4 times the length of the glumes, bent in the middle, rough 

 above, twisted and hairy below; sterile spikclets mostly rudiments. {A. nutans, 

 L.) — Dry barren soil, Florida and northward. Sept. IJ. — Culms 2° - 4° high. 

 Panicle l°-20 long 



3. S. secundum. Panicle erect, contracted, 1-sided; spikclets nodding; 

 glumes light brown, very hairy all over; otherwise like the last, and proliahly a 

 variety of it. (Andropogon secundus. Ell.) — Dry sand-ridges in the pine bar- 

 rens, Georgia and Florida. Sept. and Oct. — Culms 2° - 3° high. 



S. VULGARE, Pers., is the Diirra. Coun ; S SACcnARATUM, the Broom 

 Corn ; S. cernuum, Willd., the Gitini-.v Corn. S. iialapense, Pers., is 

 sometimes cultivated under the name of Cuba Grass. 



69. LUZIOLA, Juss. 



Perennial aquatic or marsh grasses, with narrow elongated leaves, and pan- 

 iclcd monoecious flowers ; the pistillate and smaller staminate spikck-ts borne 

 on separate ])anicles. — Spikclets scattered, on jointed pedicels, nearly terete, 

 1 -flowered Glumes none. Palea; 2, nearly equal, membranaceous, concave, 

 obtuse, strongly nerved. Squamulae 2. Stamens 5-11 : anthers linear, 2-Iobed 

 at the base, much longer than the short filaments. Styles 2, short : stigmas 

 plumose. Grain free, ovoid. Pericarp crustaceous. 



