Family POACEZ 57 
7. Aristida gracilis Ell. Slender Beard-grass. 
In dry soil in the western part of the state. Atkinson; Arabia; 
Bassett; Valentine. 
8. Aristida desmantha Trin. & Rupr. 
Minden. 
Tribe 8. ORYZE. 
Spikelets alike; flowers all perfect; scales awnless. 1. Homalocenchrus. 
Spikelets not alike; flowers monecious; scales of the pistillate spike- 
lets long awned. 2. LZizania. 
1. Homalocenchrus (Leersia). 91. 
Spikelets 4-5 mm. long, 1.5 mm. wide 1. H. oryzoides. 
Spikelets 2.5-3 mm. long, 1 mm. wide. 2. H. virginicus. 
1. Homalecenchrus oryzoides (L.) Poll. Rice Cut-grass. 
In marshy places and along streams throughout the state. Bellevue; 
Coon Creek; Grand Island; Halsey; Lincoln; Lodge Pole creek; 
North Platte; Royal; Talmage; Valentine. 
2. Homalocenchrus virginicus (Willd.) Britton. 
In similar places as the last, not reaching the western part of the 
state. Bellevue; Cass county; Culbertson; Lincoln; Meadville; 
Weeping Water; Whitman. 
1. Zizania. 91. 
1. Zizania aquatica L. Indian Rice. 
In marshes and along streams over most of the state. Atkinson; 
Bone creek; Furnas county; Lincoln; Newark; Simeon; Stanton. 
Tribe 9. ANDROPOGONEZ. 
Inflorescence composed of many-flowered spike-like racemes. 
1. Andropogon. 
Inflorescence composed of few-flowered racemes, arranged in open 
panicles. 2. Sorghastrum. 
1. Andropogon (Schizachyrium). 68. 
Racemes solitary. 1. A. scoparius. 
Racemes 2 or more together. 
Fourth scale with a long bent awn, twisted at the base. 
Empty scales hispidulous all over, hairs on rachis internodes 2 
mm. long. 2. A. furcatus. 
Empty scales smooth except on the nerves, hairs on rachis inter- 
nodes 3-4 mm. long. 3. A. chrysocomus. 
Fourth scale awnless or with a short, straight, untwisted awn. 
Pedicels and rachis internodes with copious, stiff, marginal hairs. 
4. A. hallii. 
Pedicels and os internodes with scant, lax, marginal hairs. 
5. A. paucipilus. 
1. Andropogon scoparius Michx. Little Blue-stem. 
Common in the prairies all over the state. Anselmo; Deuel county; 
Dismal river; Grand Rapids; Halsey; Lincoln; North Platte; Repub- 
lican City; Valentine. 
2. Andropogon furcatus Muhl. Big Blue-stem. 
Common in prairies throughout the state. Beaver creek in Holt 
