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ZIZANIA Linn. 
A reed like aquatic grass, 6 to 10 feet high, with broad leaves 2 to 3 
feet long; panicles often 2 feet long, the long branches somewhat ap- 
pressed above, spreading below, the upper ones pistillate, the lower male; 
the female spikelets almost subulate, long-awned, the male spikelets 
awnless. I ruit linear, slender, § inch long. 
1, Zizania aquatica Linn, (WiLp Rice, INDIAN Rick, WATER Oats.) (Gray’s 
Manual, 6th ed., p. 635.) Annual, culms 5 to 10 feet high, leaves linear-lanceolate ; 
panicle ample, pyramidal.-- Swampy borders of streams and in the shallow muddy 
borders of lakes. Very widely diffused, New England to Texas and Forida and 
northwestward to Minnesota, 
ZIZANIOPSIS Doell, & Asch. 
Tall, aquatic grasses with the habit of ZIZANTA, the perfect spikelets 
terminating the branches of the spreading panicle, the male spikelets at 
the base of each branch. Fruit a globular nut, with a hard, shining, 
easily separable pericarp. Stigmas united. 
1, Z. miliacea Doell. & Asch. Culms siout, 4 to 8 feet high; leaves long (2 feet), 
Linch wide or more; panicte 1 to 2 feet long, the branches at first oppressed, becom- 
ing spreading. In ditches and wet grounds.—Southern States to Texas. 
ORYZA Linn. 
Spikelets * elongated, much compressed laterally, empty glumes of 
two small seales or bristles, and underneath these, two more minute 
rudimentary empty glumes. Flowering glume conduplicate and keeled, 
usually awned; palet narrow, l-nerved. Stamens 6, Fruit long-obtuse, 
closely enveloped by the fruiting glume, and compressed laterally, with 
two lateral furrows. Embryo short, curved. 
1. O. sativa Linn. Sp. Pl. p. 465. (CULTIVATED Rice). Panicles contracted and 
rough, flowering glumes prominently 5-nerved. 
LEERSIA Swartz. 
Spikelets 1-flowered, flat, articulated on short pedicels along the 
slender branches of a terminal panicle. Glumes 2, strongly com- 
pressed or conduplicate, awnless, bristly ciliate on the keels, the lower 
one much the larger. No palets. Stamens | to 6. Stigmas 2; styles 
short, distinct. Perennial grasses, the leaves and sheaths usually 
rough with minute prickles or bristly hairs. 
1. L. hexandra Swartz. (Chapm. FI. 8S. States, p. 549.) Culms 2 to 6 feet high, 
slender, often branching below ; leaves 4 to 6 inches long, rather rigid, variable in 
width, sheaths scabrous; panicle exserted, erect, contracted, 3 to 5 inches long; 
spikelets 2 lines long, lanceolate to oblong, acute, margins short, fringed, hispid on 
the keel; stamens 6, styles 2, distinct.—Low grounds near the coast, 
2. L. oryzoides Swartz. (WHITE Grass, CuT-Grass). (Gray’s Manual, 6th ed., 
p. 635.) Culms erect or decumbent, rather stout, branching or simple, 3 to 4 feet 
high, leaves light green, very rongh; panicle rather large and diffusely branched, 6 
to 18 inches long; spikelets about 2 lines long, oval or oblong, hispid-ciliate on the 
keel, very short-pointed, short-pediceled ; stamens 3.—Common in wet places, 
* This foreign species is introduced because so extensively cultivated in the South- 
ern States. 
