52 WOODSIA OBTUSA. COMMON WOODSIA, 



pody " Is also objectionable, though still much in use. As we 

 are left without any acceptable popular name, we would suggest 

 " Common Woodsia," as it is perhaps the best known of all the 

 American species of the genus. 



It is widely distributed over the Eastern portion of the United 

 States. Mr. Redfield Includes it In his Appalachian group, 

 which comprises those species found in the mountain and hilly 

 regions of the United States east of the Mississippi. 



Dr. Gray in his " Manual " locates it on " Rocky banks and 

 cliffs especially northward ; " Chapman gives " Rocks along the 

 Allegheny Mountains and northwards ; " and Wood refers it to 

 "among and on rocks, New York, to Kentucky and Tennessee." 

 It Is possible it may be a little beyond the strict line of the Mis- 

 sissippi, of which botanically the Missouri forms a part, for Mr. 

 James Wilson reports it from Leavenworth, Kansas, and Pro- 

 fessor Lesquereux regards it, though with some doubt, as indig- 

 enous to Arkansas. Mr. Howard Shriver notes it as abundant 

 in Pulaski county, V'iiginia. 



Explanations of the Plate. — i. Medium-sized specimen from Pennsylvania, taken in June. 

 2. Enlarged pinna in fruit. 



