LIST OF THE PLANTS COLLECTED 47 



[Lepidium medium Greene. 

 Reported by Fromme.] 

 ^196 Lesquerella alpina (Nutt.) Wats. 



Common on the bare soils of tables, etc. 



*I97 Lesquerella argentia (Pursh) Mac M. Globular-podded 

 Crucifer. 



Common on the steppe. 

 *I98 Lesquerella Lunellii A. Nels. 



Abundant on the steppe. 

 199 Physaria didymocarpa Gray. 



Rare, Slim Buttes, June. 

 *2OO Roripa lyrata (Nutt.) Rydb. 



Abundant on muddy margins of streams throughout. 



20 1 Roripa paluslris (L.) Bess. 



Fairly abundant in mud along streams throughout the area. 



202 Roripa sinuate (Nutt.) A. S. Hitch. Nastursian. 

 Uncommon in open woods along the Little Missouri Valley 

 and elsewhere along streams. 



203 Roripa "close to R. sinuata but likely distinct." A. Nels. 

 Fields, roadsides, etc., near Rabbit Butte, Perkins Co. 



204 Sophia incisa (Engelm.) Greene. Tansy Mustard. 

 Plentiful about the Short Pine Hills. 



*2O5 Sophia pinnata (Walt.) Brit. 

 Common on tables of buttes. 



38 CAPPARIDACEAE (Capper Family) 



205 Cleome serrulata Pursh. Bee-plant. 

 Infrequent on sandy floodplains. 



*2o6 Polanisia graveolens Raf. 

 Common in sand. 



207 Polanisia trachysperma T. & G. Clammy-weed. 

 Abundant on : sand along valleys. 



39. SAXIFRAGACEAE (Saxifrage Family) 



208 Heuchera hispida Pursh.? Alumroot. 



Rare in the shade at high altitudes in the buttes. 

 *2O9 Heuchera valifolia Nutt. 



Fairly numerous in cracks in the rocks in gulches in the 

 forest reserves. 



