776 REPORT OF STATE GEOLOGIST. 



S. Virginiensis Michx. Early Saxifrage. 



A few forms occur in southeastern Indiana on rocky hillsides 

 and limestone ledges. An exceptional form in our area. 

 Flowering specimens collected April 19. 

 Dearborn (Collins). 



SULLIVANTIA Torr. and Gray. 



S. Sullivantii (T. and G.) BrittoD. 



(ft OhionisT. and G.) 

 Confined to the southern counties of the State, where it is 

 found abundantly in a few stations. With us it is strictly a plant 

 of limestone cliffs. It grows well up the vertical cliff walls, 

 securing a foothold in the thinnest layers and smallest pockets 

 of soil. It was first detected at Clifty Falls in Jefferson County, 

 by Dr. John M. Coulter, in 1874, since which time two other sta- 

 tions have been located, the plant never being in any other situ- 

 ation than on limestone cliffs. 

 Flowers in June. 



Jefferson and Floyd (Barnes); Clark (Baird and Taylor); Car- 

 roll. 



TIARELLA L. 



T. cordtfolia L. False Mitrewort. 



In a few counties of the State, occurring sparingly in rich, 

 moist woods. A delicate form perhaps mistaken for Mitella. 

 Flowering in April and May. 

 Jay, Delaware, Randolph and Wayne (Phinney); St. Joseph. 



HEUCHERA L. 



H. villosa Michx. Hairy Sanicle. 



Only found in the southern counties of the State, where it 

 grows in sparing numbers on rough hillsides in coarse soils. 

 Flowering from June through August. 

 Clark (Barnes). 



H. Americana Pursh. Alum root. 



Widely distributed throughout the State; frequent, but never 

 occurring in large numbers. Usually found in dry, coarse and 

 even rocky soils. 



Flowers from May until September. 



Tippecanoe (Cunningham); Kosciusko (Coulter); Jefferson 

 (Barnes); Putnam (MacDougal); Jay, Delaware, Eandolph and 

 Wayne (Phinney); Clark (Baird and Taylor); Gibson and Posey 

 (Schneck); Noble (Van Gorder); Franklin (Meyncke); Monroe 

 and Vigo (Blatchley); Steuben (Bradner); Fayette (Hessler). 



