NO. 34 NEW LEATHER FLOWER FROM ILLINOIS — STANDLEY 3 



pubescent, densely so about tbe apex ; mature achcnes not seen, tbe 

 immature ones with long persistent plumose styles. 



Type in the U. S. National Herbarium, no. 619852, collected by 

 Mr. Robert Ridgway at Bird Haven, two and one-half miles north 

 of Olney, Richland County, Illinois, June 6, 1910. Additional 

 material is mounted on sheet 619853. 



The proposed species is a near relative of Viorno. viorna. the 

 common leather-flower. It differs chiefly in the outline and espe- 

 cially the tips of the leaf-segments. In V. vionia the leaflets are 

 merely abruptly acute and the tips, if there are any, are not more 

 than a millimeter or perhaps two, in length. The pubescence is 

 much more abundant in V. ridgwayi, as well. I have seen no other 

 collections of the species, but this is not surprising since so few 

 collections have been made in southern Illinois. 



Plate I represents a leaf of the type, two-thirds natural size. 



