44 POALES 
Panicle over 6 cm. long. 1. S. longifolius. 
Panicle less than 6 cm. long. 2, S. vaginaefiorus. 
Spikelets not over 3 mm. long, panicle partly enclosed in the slieath. 
3. S. neglectus. 
Panicle open, not spike-like. 
Spikelets over 4 mm. long, first scale subulate, often, awn-pointed. 
4. S. heterolepis. 
Spikelets 2 mm. long or less. 
Empty scales unequal, the first half as long as the second or less 
First scale half as long as the second, not scabrous keeled. 
5. S. airoides. 
First scale 44 as long as the second, scabrous keeled. 
6. S. cryptandrus, 
Empty scales about equal. 
Rootstock present, leaves 2 mm, wide or more. 
7. S. asperifolius. 
Rootstock wanting, leaves less than 2 mm. wide. 8. S. confusus. 
1. Sporobolus longifolius (Torr.) Wood. 
Throughout the state. Kennedy; Lincoln; Valentine. 
2. Sporobolus vaginaeflorus (Torr.) Wood. 
Common in waste places except in the extreme west. Atkinson; 
Bellevue; Carns; Hardy; Lancaster; Lincoln; Long Pine; Minden. 
3. Sporobolus neglectus Nash. 
Over most of the state. Callaway; Long Pine; Valentine. 
4. Sporobolus heterolepis A. Gray. 
In the eastern part of the state, not common. Anselmo; Atkinson; 
Ewing; Lincoln. 
5. Sporobolus airoides Torr. : 
In prairies in the western part of the state. Alliance; Box Butte 
County; North Platte; Sheridan County. 
6."Sporobolus cryptandrus (Torr.) A. Gray. 
Common in sandy soil all over the state. Anselmo; Box Butte Coun- 
ty; Brunswick; Cherry County; Culbertson; Republican; Scotts Bluff 
County; Thedford; Valley County; Verdigris Creek. 
7. Sporobolus asperifolius Nees. & Meyen. 
In the western part of the state. Box Butte County; Hitchcock Coun- 
ty; Kearney; Simeon; Rushville. ° 
8. Sporobolus confusus Vasey. 
Scotts Bluff County. 
6. Phleum. 102. 
1. Phleum pratensis L. Timothy. 
Cultivated for hay and often escapes. Long Pine; Lincoln; Sioux 
County; Thedford; Valentine. 
7. Alopecurus, 102. 
1. Alopecurus aristulatus Michx. Water Fox-tail. 
Alopecurus geniculatus L. 
Common in wet places throughout the state. Box Butte County; Deuel 
County; Halsey; Lincoln; Long Pine; Minden; Rushville; Scotts 
Bluff County; Thedford. 
8. Polypogon. 107. 
1. Polypogon monspeliensis (L.) Deaf. Beard Grass. 
Newark. 
