152 



Coriiigia orient-alls, (L.) Dumort. Hare's-ear Mustard. 



Sparingly introduced from the Missouri valley east- 

 ward, becoming troublesome in some localities. 



CAPPARIDACE/E. Caper Family. 



Cleoma serrulata, Pursh. Pink Cleome. 

 Cleoma integifolia, T. & G. 

 From the Missouri valley westward; not abundant. 



Polaiiisia trachysperma, T. & G. Clammy Weed. 



On sandy and gravelly shores throughout the state. 



CRASSULACE^E. Orpine Family. 



Sedum stenopetalum, Pursh. Western Stone Crop. 

 On dry, rocky knolls in the Black Hills. 



Penthorum sedoides, L. Virginian Stone Crop. 



Along and in streams in the Minnesota and Sioux 

 valleys; abundant. 



SAXIFRAGACE^S. Saxifrage Family. 



Saxifraga cernua, L. Nodding Saxifrage. 

 Near Sylvan lake, in the Black Hills. 



Heuchera hispida, Pursh. Rough Heuchera, Alum-root. 

 In thickets from the Missouri valley eastward, and in 

 the Black Hills. 



Heuchera parviflora, Nutt. Small Flowered Alum-root. 

 Near Rockford in the Black Hills. 



Parnassia Caroliniana, Michx. Grass of Parnassus. 



In cold swamps in the Minnesota region, and one 

 station, near Elkton, in the Sioux valley. 



Pariiassia parviflora, DC. Small-flowered Grass ot Par- 

 nassus. 



In cold swamps in the Minnesota valley and in the 

 Black Hills. 



