772 REPORT x OF STATE GEOLOGIST. 



Dr. Hessler reports it "rather frequent on dry, limestone cliffs 

 and in hilly drift/' while Mr. Blatchley reports its occurrence in 

 "rocky woods/' 



Vigo and Monroe (Blatchley); Cass (Hessler); Franklin 

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

 son (Schneck); Decatur (Ballard); Hamilton (Wilson). 



A. patens Sulliv. Spreading Rock Cress. 



Sparsely distributed through the State. 



Commencing to flower in the southern counties in April, in the 

 northern in May. 



Tippecanoe (Cunningham); Jefferson (J. M. Coulter); Clark 

 (Baird and Taylor); Decatur (Ballard). 



A. hcrsuta (L.) Scop. Hairy Rock Cress. 



Occurring on rocky hillsides or dry, gravelly soil in several 

 counties of the State. 



Flowers in April and May. 



Vigo, Monroe and Montgomery (Blatchley); Putnam (Mac- 

 Dougal); Cass (Hessler); Noble (Van Gorder). 



I have never seen the plant growing, and the data as to soil 

 habits are taken from Mr. Blatchley. 1 



A. laevigata (Muhl.) Poir. Smooth Rock Cress. 



On rocky hillsides and in ravines and thin woods. 



Flowers in May and June, although in favored localities it may 

 bloom in April. 



Jefferson (Barnes); Monroe and Vigo (Blatchle} r ); Putnam 

 (MacDougal); Fayette (Hessler); Gibson and Posey (Schneck); 

 Jay, Delaware, Randolph and Wayne (Phinney); Noble (Van 

 Gorder); Clark (Baird and Taylor); Franklin (Meyncke); Ver- 

 million (Wright); Decatur (Ballard); Hamilton (Wilson). 



A. Canadensis L. Sickle-pod. 



A form found only in sand or gravel soils, in rather shaded 

 positions. 



Flowers somewhat later than other forms, June being the time 

 over the greater part of its area. 



Tippecanoe (Cunningham); Vigo (Blatchley); Clark (Baird 

 and Taylor); Noble (Van Gorder); Franklin (Meyncke); Jay, 

 Delaware, Randolph and Wayne (Phinney); Lake (Hill); Steuben 

 (Bradner). 



l Blatchley, W.S. A Catalogue of the Uncultivated Ferns and Flowering Plants of Vigo 

 County, Indiana. 21st Geol. Rept., 1896, p. 635. 



