ORDER 155. GRAMINE^E. 



383 



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



d<l Both spikelets of each pair fertile. Lower flower awned. Plume f jiElANihjs. 73 



Flowers awnless. Sugar-cane SACCHABUU. 74 



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



Flowers and rachis smoothish SORGHUM. 76 



M The lower spikelet on each spike fertile, in a bony shell. Job't-teart Coil. 77 



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

 Spikelets 1-flwd., flat, fls. . Glumes 0. Pales 

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

 ing the free flat grain (caryopsis). U Swampy 

 grasses. Lvs. very rough backward. PI. in 

 Fecund 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 I., oryzoides Swtz. (a) Spikelets narrowly ellip- 



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

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



2 L. leiitlciilaris MX. Catch-fly Grose. Spkl. round- 



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

 it-L. Ponds and low grounds, 111. to Va., and 8.: rare. Fls. said to close on flies. 



3 L. Virgiiiica Willd. Spkl. email, closely appressed to the branchlet; stam. 2, 



pales wtiite, wilh green veins, slightly ciliate. Wet shades. Aug. 



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



cated, lance-oblong ; stam. 6. Culms branched, 1 5f. Water. Fla. 



2. ORYZA, L. RICE. Spikelets 1-flwd., 5 Glumes minute or obsolete, 

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

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



O. SATIVA. Culm 2 4f, Ivs. broadly linear, the ligule 1' long. A most important cereal, 

 cultivated South in meadows and inundated grounds. 



3. Z1ZANIA, Gron. INDIAN RICE. Stout 

 water-grasses, with large monoecious panicles. 

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

 with a straight awn in the ? . Stam. 6 in the $ (b). 



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



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

 (d) long Ui'>; grain slender, 68", very caducous. U- 

 rinaceou-*. Marshes, Aug. Cultn 5 8f. Lvs. broad. 



2 Z. iniltacea 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. 5 11, anth. very long. Grain ovoid. U Aquatic, with 

 long narrow leaves. 



L. AlabameiiNl* Chapm. Culms 46', Mvd., the leaf 1 2f long, its purple (.heath 

 enclosing tne bract and peduncle; panicle few-flowered; splkelet lance-ovate, ou 

 erect jointed pedicels. Alabama : rare. 



