l6o UNIVERSITY OF MISSOURI STUDIES [308 



642. A. nana Nutt. [A. microphylla Pursh]. SMALL-LEAVED 



FALSE INDIGO. 



Dry plains between Boulder and Marshall, 5400 ft. (Dan- 

 iels, 521). 



IOWA to MANITOBA; MISSOURI to COLORADO. 



258. PSORALEA L. INDIAN BREADROOT. POM ME 



BLANCHE. 



643. P. tenuiflora Pursh. FEW-FLOWERED INDIAN BREADROOT. 

 One of the commonest and most characteristic plants of 



the plains and mesas, and in open meadows on the foothills, 

 5100-8000 ft. (Daniels, 297). A white-flowered form is oc- 

 casional (Daniels, 297a). 



MINNESOTA to MONTANA; ILLINOIS to ARKANSAS, TEXAS 

 and ARIZONA. 



644. P. argophylk Pursh. SILVER-LEAF INDIAN BREADROOT. 

 Local on the plains and mesas, 5100-6000 ft. (Daniels, 189). 

 WISCONSIN to SASKATCHEWAN; MISSOURI to NEW MEXICO 



and ARIZONA. 



259. PETALOSTEMON Lam. PRAIRIE CLOVER. 



645. P. oligophylhis (Torr.) Rydb. [P. gracilis oligophyllus 

 Torr. ; Kuhnistera oligophylla (Torr.) Heller]. SLENDER 



WHITE PRAIRIE CLOVER. 



On the plains and mesas, 5100-6000 ft. (Daniels, 161). 

 IOWA to ASSINIBOIA; TEXAS to ARIZONA and MEXICO. 



646. P. purpureus (Vent.) Rydb. [P. violaceus Michx. ; Kuh- 

 nistera purpurea (Vent.) MacM.]. VIOLET PRAIRIE CLO- 

 VER. 



Common on the plains and mesas, 5100-7000 ft. (Daniels). 

 INDIANA to SASKATCHEWAN and ALBERTA; MISSOURI to 

 TEXAS and NEW MEXICO. 



647. P. pubescens A. Nelson. HAIRY VIOLET PRAIRIE CLOVER. 

 Plains about Boulder, 5600 ft. (Daniels, 349). 

 COLORADO. 



