158 NATURAL HISTORY BULLETIN. 



OSMUNDA CLAYTONIANA L. 



Very common in shady places, especially at the heads of 

 heavily wooded ravines. The following counties are repre- 

 sented in the herbarium: Johnson (June, 1880 and 1892) ; 

 Jones {J. E. Cameron, July, 1895) ; Delaware {J. E. 

 Cameron, Oct., 1897); Allamakee (7". E. Savage, June, 

 1899); Adair {J. E. Gow. August, 1900.) 



The specimens vary from the unfolding fertile fronds of 

 spring through the fully expanded state still retaining the 

 withered fertile pinnae, to the sterile forms of late summer 

 and autumn. The species is much more common in the 

 State than it would seem to be from the comparatively 

 small number of locality sets in the collection. However, 

 with the clearing and pasturing of timber it is very rapidly 

 diminishing in numbers. 



Sub-order POLYPODIACEiE R. Br., Prod. Fl. Holl., 



vol. I, p. 145 (1810). 



Family POLYPODIES J. Sm., Hk. Jour. Dot., (1841). 



Genus POLYPODIUM L., Sp. PL vol. II, p. 1082, 



(1753). 



POLYPODIUM VULGARE L. 



This species has thus far been received only from the 

 extreme eastern part of the State, where it is locally 

 common on moss-covered banks, etc. The specimens are 

 all in full fruit, those from Clayton county alone being 

 somewhat immature. Three counties only are represented: 

 Muscatine ( T. H. Macbridc, Sept., 1882; F. Rcppert, 

 Aug., 1894, "on sandstone ledges"; Shimek, Nov., 1897, 



