IOWA PTERIDOPHYTA. 159 



and Oct., 1900); Allamakee {T. H. Macbride, Aug., 

 1893); and Clayton (T. J. Fitepatrick, July 7, 1895). 



Family W00DSIE51 Eaton , Ferns N . Am . , vol . ii , p . xi . ( 1880 ) . 



Genus WOODSIA^. Br., Tr. Linn. Soc, vol. II, p. 



170, (1812). 



WOODSIA SCOPULINA D. C. Eaton. 



A species which was first found by the writer in the 

 extreme north-western corner of the State, in Lyon county, 

 in August, 1896. In June, 1897, much finer sets were 

 secured on two exposures, about two miles apart. These 

 have an abundance of younger fruit with well-developed 

 involucres, and their excellent condition makes the indenti- 

 fication certain. Three representative sets are in the 

 herbarium. 



Woodsia OBTUSA {Spreng.) Torr. 



This species seems to be rather rare in the State. It is 

 found sparingly in a number of localities in Johnson county, 

 usually on the moss-covered tops of limestone ledges. The 

 fruiting begins in June. Some of the fronds from Johnson 

 county in the herbarium measure nearly seventeen inches 

 in total length. The following counties only are repre- 

 sented: Johnson (Sep., 1893; June, 1894); Boone (L. 

 H. Pammcl, Aug., 1896). 



Genus ONOCLEA Z., Sp. PI. vol II, p. 1062 (1753). 



Onoclea sensibilis L. 



This species is locally common in rather wet meadows, 

 in the bottoms of wooded ravines, etc. The fruiting fronds 

 begin to appear in June and mature in August. The 

 herbarium specimens are from Johnson county (Sep., 

 1880; Aug., 1893); Muscatine county {F. Rcppcrt, June, 



