POACEAE: PANICEAE 41 



14. Panicum wilcoxianum Vasey. 



Common in the sand-hills. Callaway; Hastings; Fort Niobrara; Lin- 

 coln; Minden; Stanton; Thedford; Valentine; Valley County;' Wei- 

 gand. 



15. Panicum scribnerianum Nash. 



All over the state. Belmont; Broken Bow; Ewing; Hardy; Lincoln; 

 Mullen; Thedford; Valentine; Weeping Water. 



16. Panicum leibergii (Vasey.) Scribn. 

 Ponca; Stanton. 



17. Panicum latifolium L. 

 (Iowa & Kansas.) 



2. Echinochloa. 78. 



1. Ecliinochloa crus-galli (L.) Beauv. Barnyard Grass. 



A common weed in moist soil. Atkinson; Benkleman; Brunswick; 

 Chelsa; Ewing; Mullen; Royal; Valentine; Whitman. 



3. Paspalum. 72. 



1. Paspalum stramineum Nash. Bead Grass. 



Common in dry sandy soil throughout the state. Bellevue; Holt 

 County; Kennedy; Minden; Mullen; Oreopolis; Red Cloud; Thedford; 

 Verdigris. 



4. Syntherisma, 76. 



Pedicels terete or nearly so, spikelets less than 2.5 mm. long. 



1. S. linearis. 

 Pedicels three angled, spikelets 2.5 mm. long or more. 



2. S. sanguinalis. 



1. Syntherisma linearis (Krock.) Nash. 

 Digitaria humifusa Pers. 



Long Pine. 



2. Syntherisma sanguinalis (L.) Dulac. Crab Grass. 

 Digitaria sanguinalis (L.) Scop. 



A common weed in the eastern part of the state, less common west- 

 ward. Custer County; Guide Rock; Hardy; Lincoln; Minden; Valen- 

 tine. 



5. Chaetochloa. (Setaria.) 89. 



Bristles 5-16 at the base of each spikelet, tawny-orange. 1. C. glauca. 



Bristles 1-3 at the base of each spikelet. 



Bristles downwardly barbed. 4. C. verticil lata. 



Bristles upwardly barbed. 



Spikelets 2 mm. long, bristles green. 2. C. viridis. 



Spikelets 2.5 mm. long, bristles purple. 3. C. italica. 



1. Chaetochloa glauca (L.) Scrib. Yellow Fox-tail. 

 Common as a weed all over the state, but most aboundant in the east. 

 Franklin; Lincoln; Talmage. 



2. Chetochloa viridis (L.) Cribn. Green Fox-tail. 

 A common weed all over the state. Franklin; Greenwood; Halsey; 

 Hardy; Lincoln; Minden; Mullen; Schuyler; Talmage; Valentine; 

 WeigancJ. - - ,, .: il ^ _ 



