LIST OF THE PLANTS COLLECTED 51 



252 Lotus americanus ( Xutt.) Bisch. "Wild Alfalfa," "Dakota 

 Vetch." 



Wide spread and abundant on the plains and in fields. 



Still more plentiful on sandy floodplains. 

 *253 Lupin us argent ens Pursh. Lupine. 



Abundant on the steppe, especially at high elevations. 



254 Lnpinns pusillns Pursh. 



Very abundant in sand along valleys and in sandy soil of the 

 plains. 



255 Melilotns alba Desv. White Sweet-clover. 



Found along the banks of several streams even fifty miles 

 from a railroad. 



[Petalostemon candidus Michx. White Prairie Clover. 

 Reported by Fromme.] 



256 Petalostemon oligoghyUits (Torr.) Rydb. White Prairie 



Clover. 

 Fairly abundant on the steppe. 



257 Petalostemon pnrpurens (Vent.) Rydb. 

 Abundant on the high prairies throughout. 



258 Petalostemon z'illosns Nutt. 



Rare, found only on the grassy table of North Cave Hills. 



259 Psoralea argophylla Pursh. 

 Abundant on the plains in loam. 



260 Psoralea lanceolata Pursh. 



Fairly abundant in open woods, etc. 



261 Psoralea tenniffora Pursh. 

 Common along the Grand River. 



262 Strophostyles panciflora (Benth.) Wats. Small Wild Bean. 

 Locally common along some of the creeks. 



263 Thermo psia rhombifoldia (Nutt.) Rich. 



Abundant on the steppe, dominant on brakes. Only a few 

 individuals fruit in dry years. 



264 Vicia linear is (Nutt.) Green. Narrow-leaved Vetch. 

 Plentiful in draws on the plains. 



45. OXALIDACEAE 



265. O. rails stricta L. Wood Sorrel. 



Abundant in blue stem draws on the steppe. 



