OKDER 155. GRAMINE^E. 



383 



16 Flowers not imbedded, spicate or panicled, mostly long-bearded... (dd) 



dd Both spikelets of each pair fertile. Lower flower awned. Plume G liRiANTh js. 73 



Flowers awnless. Sugar-cane SACCHAHUM. 74 



dd Only one spikelet of each pair fertile. Fls. and rachis hairy. Beard G AKDROPOGOW. 75 



Flowers and rachis smoothish SORGHUM. 76 



dd The lower spikelet on each spike fertile, in a bony shell. JoVs-tears Coix. 77 



1. LEERSIA, Sol. CUT GRASS. FALSE RICE. 

 Spikelets 1-flwcl., flat, fls. ? . Glumes 0. Pales 

 boat-form, nearly equal, awnless, ciliate, enclos- 

 ing the. free flat grain (caiyopsis). U Swampy 

 grasses. Lvs. very rough backward. Fl. in 

 eecund panicled racemes. June, Aug. 



* Panicle compound, large, diffuse. Spike- 



lets nearly 3" long Nos. 1, 2 



* Panicle simple or nearly so. Spikelets 



scarce more than 1" Nos. 3, 4 



1 L. oryzoides Swtz. (a) Spikelets narrowly ellip- 



tic, spreading, whito, close (b) ; stamens 3 ; culm 

 3 5f, retrorsely rough, Ivs. broad. By streams. Aug. 



2 Ji lenticularis MX. Catch-fly Grass. Spkl. round- 



oval (c) when closed, closely imbricated ; stam. 2 (d) ; ovary ovate (e) ; plant smooth 

 is!;. Ponds and low grounds, 111. to Va., and S.: rare. Fls. said to close on flies. 



3 I*. Virginica Willd. Spkl. small, closely appressed to the branchlet; stam. 2, 



pales white, with green veins, slightly ciliate. Wet shades. Aug. 



4 L. tiexandra Swtz. Panicle erect, narrow, exserted, 2 4' ; spkl. loosely imbri- 



cated, lance-oblong ; stam. C. Culms branched, 1 5f. Water. Fla. 



2. ORYZA, L. RICE. Spikelets 1-flwd., $ Glumes minute or obsolete, 

 pales compressed-boat-shaped, the lower larger and usually awned. Sta- 

 mens 6. Grain oblong, smooth, free in the pales. Fls. paniculate. 



O. SA.TIVA. Culm 2 4f, Ivs. broadly linear, the lignle 1' long. A most important cereal, 

 cultivated South in meadows and inundated grounds. 



3. ZIZANIA, Gron. INDIAN RICE. Stout 

 water-grasses, with large monoecious panicles. 

 Glumes 0. Pales 2, thin, narrow, the lower one 

 w ith a straight awn in the $ . Stam. 6 in the $ (b). 



1 Z. aquatica L. Panicle ample, 1 2f, the lower 



branches spreading, sterile (a), upper fertile ; awns 

 (d) long (If) ; grain slender, 6 8", very caducous, fa- 

 rinaceous. Marshes, Aug. Culm 5 8f. Lvs. broad. 



2 Z. miliacea MX. Sterile and fertile fls. intermixed 



in the ample panicle ; pales with short (13") awns. 

 Culm 6 lOf. Leaves narrow. Ohio, and S. 



4. LUZIOLA, Juss. Spikelets and fls. as in 

 Zizania, but the $ and $ in separate panicles on 



the same root. Sta. 511, anth. very long. Grain ovoid. U Aquatic, with 



long narrow leaves. 



fc. AlabameitslB Chapm. Culms 4 6', 1-lvd., the leaf 1 2f long, its purple rfieath 



enclosing the bract and peduncle ; panicle few-flowered ; epikelct lance-ovate, oil 



erect jointed pedicels. Alabama : rare. 



