GRAMINEAE. 



i. Zizaniopsis miliacea (Michx.) Doell 

 & Aschers. Zizaniopsis. (Fig. 285.) 



Zizania miliacea Michx. Fl. Bor. Am. i: 74. 1803. 



Zizaniopsis miliacea Doell & Aschers. ; Baill. Hist. PI. 

 12: 293. 1893. 





Culms 4-i5 tall from a long and creeping root- 

 stock, robust, glabrous. Sheaths loose, glabrous; 

 ligule 4 // -7 // long, thin-membranous ; leaves i 

 longer more, J^'-i' wide, smooth, glabrous; panicle 

 dense, i-i v long, narrow; branches erect ; stam- 

 inate spikelets 3"-4" long, the outer scale 5-nerved, 

 the inner 3-nerved, both acute ; pistillate spikelets 

 about 3" long, the outer scale about equalling the 

 inner, bearing an awn i"-3" long, scabrous, 5- 

 nerved; inner scale 3-nerved, acute. 



Swamps, Georgia to Ohio (according to Riddell), 

 south to Florida and Texas. June-July. 



16. ZIZANIA L. Sp. PI. 991- (I753-) 



A tall aquatic monoecious grass with long flat leaves and an ample panicle. Spikelets 

 i-flowcred, the pistillate borne on the upper branches of the panicle, the stammate on t 

 lower Scales 2, membranous, the outer somewhat longer, acute in the stammate, long- 

 awned in the pistillate spikelets. Stamens 6. Styles nearly distinct. Grain linear, 5"- 

 long. [From an ancient Greek name for Darnel.] 

 A monotypic genus of North America and Asia. 



i. Zizania. aquatica L. Wild Rice. 



Indian Rice. Water Oats. Reed. 



(Fig. 286.) 



Zizania aquatica L. Sp. PI. 991. 1753- 



Culms erect from an annual root, 3-io tall, 

 smooth and glabrous. Sheaths loose, glabrous ; 

 ligule about %' long, thin-membranous; leaves 

 i or more long, /'-!%' wide, more or less 

 roughened, especially above, glabrous ; panicle 

 i-2 long, the upper branches erect, the lower 

 widely spreading ; staminate spikelets 3 // -6 // 

 long, scales acute or awn-pointed, outer 5- 

 nerved, the inner 3-nerved ; scales of the linear 

 pistillate spikelets 4 // -i2 // long, the outer one 

 5-nervcd, with an awn i / -2 / long, the inner 

 narrower, 3-nerved, awn-pointed. 



In swamps. New Brunswick to Manitoba, south 

 to Florida, Louisiana and Texas. June-Oct. 



17. HOMALOCENCHRUS Mieg.; Hall. Hist. Stirp. Helv. 2: 201. 1768. 

 [LKERSIA Sw. Nov. Gen. &. Sp. 21. 1788. Not Hedw. 1782.] 



Marsh grasses with flat narrow generally rough leaves, and paniculate inflorescence. 

 Spikelets i -flowered, perfect, strongly flattened laterally, and usually more or less imbri- 

 cated. Scales 2, chartaceous, the outer one broad and strongly couduplicate, the inner 

 much narrower. Stamens 1-6. Styles short, distinct. Stigmas plumose. Grain ovoid, 

 free. [Greek, in reference to the supposed resemblance of these grasses to Millet.] 



About 5 specie-, natives of temperate and tropical countries. Besides the following, 2 others 



:: in the southern 1'nittd States. 

 SpikcU-ts oblong, their width less than one-half their length, somewhat imbricated. 



SpiV i'/' long; panicle-branches usually rigid. i. H. I'itginicus. 



Spikelets 2"-2'." IOIIK; panicle-branches generally lax. 2. //.on: 



Spikelets oval, their width more than one-half their length, much imbricated. 3. H. Icnlicularis. 



