418 IOWA ACADEMY OF SCIENCE Vol. XXV, 1918 



OPHIOGLOSSACE^. 



Botrychixim virginianum (L.) Swartz. Rich woods; numer- 

 ous; Winneshiek, Allamakee, Clayton, and Dubuque counties. 

 • OSMUNDACE^E. 



Osmunda clayt&niana L. Ricli woods ; common ; Winneshiek, 

 Allamakee, Clayton, and Dubuque counties. 

 POLYPODIACE^. 



Onoclea sensibilis L. In rich moist soil ; plentiful ; Winne- 

 shiek, Allamakee, Clayton and Dubuque counties. This species 

 is very ahundant on the hig'h islands in IMississippi river, east 

 of Waukon Junction ; there is also a small colony in a springy 

 slough near Postville. 



Onodea struthiopteris (L.) Hoffra. {Matteuccia struthiopteris 

 (L.) Todaro.) The specimen was collected in Allamakee county 

 by Mr. Ellison Orr who reports that the species is abundant in 

 rich soil at the foot of bluffs alono- the ^Mississippi river at 

 Waukon Junction and north of Lansino:, also north of McGregor 

 and near Beulah, Clayton county; there are also occasional 

 plants along Village creek and Oneota river, in Allamakee 

 county, in suitable localities. The species has been collected 

 also ill Dubuque county. 



Woodsia obtusa (Spreng.) Torrey. The specimen from Alla- 

 makee county was collected by Mr. Orr w^ho found it growing on 

 great fragments of rock at the foot of the bluff, one-half mile east 

 of Ion, on Yellow river. The species has also been found in 

 Winneshiek county. 



Woodsia ilvensis (L.) R. Br. Professor B. Shimek reports 

 finding this species in two localities northeast from Hesper, Win- 

 neshiek county. 



Woodsia scopulina D. C. Eaton. In 1900 Mr. Herbert God- 

 dard, of Deoorah, sent the writer a specimen found nearby 

 w^hich at the time was reluctantly refen*ed here, but on further 

 examination it is considered to belong to the preceding species. 



Cystopteris fragiUs (L.) Bemh. (Filix fragilis(L.) Under- 

 wood). Rich calcareous or moist soil in woods; common; Winne- 

 shiek, Allamakee, Clayton, and Dubuque counties. 



Cystopteris hidbifera (L.) Bemh. (Filix hulhifera (L.) Un- 

 derwood) . Rich calcareous soil ; common ; Winneshiek, Allama- 

 kee, Clayton, and Dubuque counties. 



Aspidiimv goldianwn Hook. {Dr\ijopteris goldiana (Hook.) A. 

 Gray). Winneshiek and Allamakee counties, in rich woodsy 



