POACEAE: ORYZEAE 47 



1. Aristida dichotoma Michx. 

 Nebraska, according- to Britton's Manual. 



2. Aristida basiramea Engelm. 



Common in the sand-hill region. Atkinson; Broken Bow; Exeter; 

 Long Pine; Thedford; Valentine. 



3. Aristida fasciculata Torr. 



In dry soil mostly in the western part of the state. Lavaca; Lincoln; 

 Long Pine; Thedford. 



4. Aristida fendleriana Steud, 

 Crawford; Lavaca; Valentine. 



5. Aristida Icngiseta Steud. 

 Callaway; Long Pine; Wood Lake. 



6. Aristida oligantlia Michx. 



Common over most of the state, Ainsworth; Endicott; Ewing; Frank- 

 lin; Grand Rapids; Lincoln; Long Pine; Minden. 



7. Aristida gracilis Ell. 



In dry soil in the western part of the state. Atkinson; Arabia; Bas- 

 sett; Valentine. 



8. Aristida tuberculosa Nutt. 

 Minden. 



Tribe 8. Oryzeae. 



Spikelets alike; flowers all perfect; scales awnless. 



1. Homalocenchrus. 

 Spikelets not alike; flowers monoecious; scales of the pistillate spike- 

 lets long awned. 2. Zizania. 

 1. Homalccenclnrus. (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. Homalocenchrus 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; Weep- 

 ing Water; Whitman. 



1. Zizania. 91. 

 1. Zizania aquatica L. Wild rice. 



In marshes and along streams over most of the state. Atkinson; 

 Bone Creek; Furnas County; Lincoln; Newark; Simeon; Stanton; 

 Valentine; Whitman. 



Tribe 9. Andropogoniae. 



Inflorescence composed of many-flowered spike-like racemes. 



1. Andropogon. 



Inflorescence composed of few-flowered racemes, arranged in open 



panicles. 2. Sorghastrum. 



1. Andropogon. 68. 



Racemes solitary. 1. A. scorparius. 



Racemes 2 or more together. 



