804 EEPOET OF STATE GEOLOGIST. 



X. purpurea (Vent.) MacM. Violet Prairie Clover. 

 (Petalostemon violaceus Michx.) 

 More widely distributed and much more abundant than the 

 preceding. Dry places and in prairies. 

 Flowers in June and July. 



Tippecanoe (Cunningham); Daviess (Clements); Cass (Hess- 

 ler); Vigo (Blatchley); St. Joseph and Jasper (Barnes); White 

 (Hussey); Jay, Delaware, Randolph, and Wayne (Phinney); Gib- 

 son and Posey (Schneck); Kosciusko (Coulter). 



CRACCA L. 



C. Virginiana L. Cat-gut. Goat'srue. 



(Tephrosia Virginiana Pers.) 



In sandy soils throughout the State, being more abundant in 

 the northern parts. As a liana it is a prominent member of the 

 basswood dunes along the southern shores of Lake Michigan. 

 While more abundant in the north, it is of much larger size in the 

 south and more frequently occurs as an erect shrub. 



Flowering season, May and June. 



Cass (Hessler); Knox and Vigo (Blatchley); Jefferson 

 (Barnes); Clark (Baird and Taylor); Noble (Van Gorder); Lake, 

 Porter, and Laporte; Steuben (Bradner). 



KRAUHNIA Raf. 



K. frutescens (L.) Greene. American Wistaria. 



( Wistaria frutescens Poir. ) 



In low, wet grounds, occurring sparingly at two widely separate 

 localities, viz., Gibson and Posey counties (Schneck); Jay (Phin- 

 ney); Kosciusko (Coulter). 



It blooms in June, and in its northern range is a trailing shrub. 



ROBINIA L. 



R. Pseudacacia L. Black or Yellow Locust. False Acacia. 



Common throughout the State through planting and naturali- 

 zation. It suffers greatly in certain seasons from the attacks of 

 the locust borer (Cyllene picia). The dense, hard wood is of 

 great value and from an economic standpoint has few superiors. 

 Locally it is principally used for posts and wagon hubs. There 

 are records of posts of this species that have been set over fifty 

 years and are yet sound. Its best development is along streams 

 and in black, sandy loam. Its soil requirements seem about those 



