POACEAE: AGROSTIDEAE 43 



1. Agrostis. 109. 



Palet conspicuous, at least 1/3 as long as the flowering scale. 1. A. alba. 

 Palet minute or wanting. 



Branches of the panicle spikelet-bearing to the base. 



2. A. asperifolia. 

 Branches of the panicle naked below. 



Stems weak, often decumbent. 3. A. perennans. 



Stems erect. 4. A. hyemalis. 



1. Agrostis alba L. Red-top. 

 Cultivated for hay and pasture. Common in low prairies where it 

 often drives out the native grasses. Anselmo; Halsey; Hat Creek 

 Basin; Dukeville; Kearney; Lincoln; Rushville; Talmage; Thedford; 

 Wahoo. 



2. Agrostis asperifolia Trin, Mountain Red-top. 

 In western part of the state. Belmont; Dismal River; Hat Creek 

 Basin; Long Pine; Mullen; Plummer Ford; War Bonnet Canon. 



3. Agrostis perennans (Walt.) Tuckerm. 

 Cass County. 



4. Agrostis hyemalis (Walt.) B. S. P. Hair grass. 

 In prairies over most of the state. The panicle is blown about as a 

 tumble-weed. Atkinson; Belmont; Dismal River; Elmwood; Halsey; 

 Kearney; St. James; Lincoln; Minden; Thedford. 



2. Calamagrostis, 109. 



Panicle open, the lower branches wide spreading. 1. p. canadensis. 



Panicle contracted, branches ascending. 



Basal hairs about as long as the scale. 2. C. inexpansa. 



Basal hairs half as long as scale. 3. C. neglecta. 



1. Calamagrostis canadensis (?ilichx.) Beauv. Yellow Top. 

 Prairies, not very common. Aten; Kearney; Ord; Platte River; Sco- 

 tia; Whitman. 



2. Calamagrostis inexpansa A. Gray. 



Mullen; along Platte River in Kearney County; Thedford. 



3. Calamagrostis neglecta (Ehrh.) Gaertn. 



In prairies, most common westwards. Atkinson; Anselmo; Ashland; 

 Hat Creek Basin; Scotia; Sheridan County; Sioux County; Valley 

 County. 



3. Calamovilfa. 114. 



1. Calamovilfa longifolia (Hook.) Hack. Reed Grass. 



Common in the sand-hill regions. Alliance; Antelope County; Banner 

 County; Belmont; Culbertson; Dismal River; Franklin; Halsey; Mul- 

 len; Sioux County; Thomas County; Valentine; Verdigris Creek. 



4. Cinna. 108. 

 1. Cinna arundinaceae L. Wood Reed-grass. 



In woods mostly in the eastern half of the state. Bellevue; Cherry 

 County; Hitchcock; Long Pine; Lincoln; Riverton; Talmage; Wahoo; 

 Weeping Water. 



5. Sporobolus. 104. 

 Panicle contracted, spike-like. 

 Spikelets 4-5 mm. long. 



