LIST OF THE PLANTS COLLECTED 35 



32 Aristida longistcda Steud. Bunch Grass. 



Frequent on gravelly foothills of the buttes ; occasional on 

 the hill-sides of the rougher parts of the plains. 



33 Atheropogon curtipendula (Michx) Fourn. Tall Grama Grass. 



Rare, on grovelly foothills of all the higher buttes. 



34 Beckmannia cntcacformis (L) Hast. 



Locally common in open woods of Little Missouri Valley. 



35 Boutcloiia oligostach\a ( Xutt) Torr. Grama Grass. 



Very abundant on the steppe throughout. Grows in vague 

 patches usually with buffalo grass. 

 [Bromus altissimus Bursh. 

 Reported by Fromme.] 



36 Bromus cinatns L. Fringed Brome. 



Abundant in ravines in woods of Slim Buttes. 

 *37 Bromus inermis Lyss. 



Locally common in open woods of the Little Missouri Valley. 



[Bromus purgans L. Brome Grass. 



Collected by Fromme.] 

 38 Buchloe dactyloides (Nutt.) Englm. Buffalo Grass. 



With the grama grass but more restricted to mesas and the 



higher steppe. 

 *39 Calamagrostis hyperborea Lange. Reed Grass. 



Frequent along streams. 



40 Calomozilfa longifolia (Hook.) Hock. Sand Grass. 



Abundant on sandy soil. On the steppe it occurs in patches 

 usually a rod or two across. Such clumps apparently start 

 about a large burrow where the soil is more porous and 

 spread by means of root propagation. 



41 Catabrosa aquatic a (L) Beauv. 



Forming great mats in sluggish portions of the brooks in 



the buttes. 

 *42. Chaetochloa viridis (L) Scrib. Green Foxtail. 



Infrequent. Found in grassy depressions. 

 43. DisticJilis spicata (L) Greene. Alkali Grass. 



Very plentiful in alkali spots along valleys. 



44 Hchinochloa crus-galli (L) Beauv. 



Frequent along water courses. 



45 Hlymus canadensis L. 



Common along streams. 



