POACEAE: AGROSTIDEAE 45 



9. Brachyelytrum. 101. 



1. Brachyelytrum erectum (Schreb.) Beauv. 

 Cass County. 



10. Oryzopsis. 97. 



1. Oryzopsis micrantha (Trin. & Rupr.) Thurb. Mountain Rice. 



In the western part of the state. Belmont; Dismal River; Long Pine; 

 Plummer Ford; Valentine. 



11. Eriocoma. 98. 



1. Eriocoma cuspidata Xutt. 



On dry plains and hillsides in the western part of the state. Bel- 

 mont; Box Butte County; Chadron; Cheyenne County; Crawford; Mul- 

 len; Sioux County. 



12. Muhlenbergia. 99. 



Panicle narrow, spike-like, branches short not spreading. 

 Flowering scales awnless or awn-pointed. 



Empty scales longer than the flowering scales. 1. M. racemosa. 

 Empty scales not longer than the flowering scales. 

 Empty scales about as long as the flowering scales. 



Stem-s much branched; rhizomes present. 2. M. mexicana. 

 Stems little branched; without rhizomes. 3. M. cuspidata. 



Empty scales about half as long as the flowering scales. 



Perennials with scaly rootstocks. 4. M. richardsonis. 



Annuals v/ithout rootstocks. 5. M. simplex. 



Flowering scales with awns as long as the scales or longer. 

 Empty scales about as long as the flowering scales. 



6. M. sylvatica. 

 Empty scales much shorter than the flowering scales. 

 Empty scales about half as long ts the flowering scales. 



7. M. tenuifolia. 

 Empty scales about one-fourth as long as the flovv^ering scales. 



8. M. diffusa. 

 Panicle open, its branches long and spreading. 9. M. pungens. 



1. Muhlenbergia racemosa (Michx.) B. S. P. 

 Muhlenbergia glomerata Trin. 



Common in wet soil over most of the state. Belmont; Halsey; Kear- 

 ney; Lincoln; O'Neill; Thedford; Valentine. 



2. Muhlenbergia mexicana (L.) Trin. 



Common in meadows and along streams throughout the state. Dismal 

 River; Halsey; Kennedy; Nattick; Neligh; Red Cloud; Thedford. 

 Valentine; Wahoo; Weeping Water. 



3. Muhlenbergia cuspidata (Torr.) Rydb. 

 Sporobolus cuspidatus Woods. 



In dry soil over most of the state. Belmont; Cass County; Cherry 



County; Cheyenne County. 



4. Muhlenbergia richardsonis (Trin.) Rydb. 



Sporobolus brevifolius Nash. 

 In the western part of the state. Cody; Kennedy; Lincoln; Minden. 

 5. Muhlenbergia simplex (Scribn.) Ryrb. 



Sporobolus simplex Scribn. 

 In the western part of the state, according to Rydberg's Flora of 



