18 POALES 



3. Eleocharis. 167. 



Achenes lenticular, style branches usually 2. 

 Annuals without rootstocks. 



Achene black. 1. E. atropurpurea. 



Achene brown. 



Bristles much longer than the achene. 2. E. ovata. 



Bristles about as long as the achene. 3. E. engelmanni 



Bristles rudimentary or wanting. a. E. engelmanni detonsa. 



Perennials with horizontal rootstocks. 



Culm stout, spikelet 6-25 mm. long. 4. E. palustris. 



Culm slender to filiform, spikelet 4-10 mm. long. 



5. E. glaucescens. 

 Achenes triangular, style branches 3. 



Spikelets flattened, 3-9 flowered; rootstock filiform. 6. E. acicularis. 

 Spikelets terete, many flowered; rootstock stout. 7. E. acuminata. 



1. Eleocharis atropurpurea (Retz.) Kunth. 

 Nebraska, according to Britton's Manual. 



2. Eleocharis ovata (Roth.) R. & S. 



In wet places in the eastern part of the state. Lincoln; Minden; Ne- 

 braska City. 



3. Eleocharis engelmanni Steud. 

 Minden. 



3a. Eleocharis engelmanni detonsa Gray. 

 Springview. 



4. Eleocharis palustris (L.) R. & S. 



Common in wet ground throughout the state. Arabia; Lincoln; Red 

 Cloud; St. Paul; Springview; Thedford. 



5. Eleocharis glaucescens (Willd.) Schultes. 

 Eleocharis palustris glaucescens (Willd.) A. Gray. 



Common in wet places all over the state. Anselmo; Arabia; Basset; 

 Bordeaux; Crawford; Ewing; Long Pine; Nattick; Pauline. 



6. Eleocharis acicularis (L.) R. & S. 



In wet places throughout the state. Anselmo; Bellevue; Deuel Coun- 

 ty; Lincoln; Lodge Pole Creek; Louisville; Minden; Nebraska City. 



7. Eleocharis acuminata (Muhl.) Nees. 



In wet places mostly in the western part of the state. Arabia; Ewing; 

 Kennedy; Long Pine; Minden; Valentine. 



4. Stenophyllus. 173. 



1. Stenophyllus capillaris (L.) Britton. 



In moist soil over most of the state, not common. Atkinson; Ewing; 



Minden. 



5. Fimbristylis. 173. 



1. Fimbristylis castenea (Michx.) Vahl. 



In wet soil over most of the state. Franklin; along Horse Creek in 



Scotts Bluff County; Newark; Scotia Junction; Valentine, 



