100 AMERICAN FERN JOURNAL 
ties; wet soil; frequent. This species is common on 
marshy islands of the Mississippi River and occasionally 
in sloughs in this region. I also have a specimen from 
the neighboring county of Fayette. 
_ ASPIDIUM MARGINALE (L.) Sw. (Dryopteris marginalis 
(L.) A. Gray.) The only specimen I have from this 
region is from Allamakee County, sent to me by Mr. 
Ellison Orr, who writes: ‘Growing on a timbered, 
shady, steep north slope of a sandstone bluff capped 
by limestone, about seven miles northeast of Postville 
on Yellow river, only one colony—a fine one—dis- 
covered so far in the county.’’ This is a rare fern for 
Iowa. 
PHEGOPTERIS DRYOPTERIS (L.) Fée. (Dryopteris dry- 
opteris (L.) Britton.) I have specimens which I have 
referred here from Winneshiek and Allamakee Counties. 
The habitat is moist, rocky woods. 
PHEGOPTERIS ROBERTIANA (Hoffm.) A. Br. (Phegop- 
teris calearea Fée. Dryopteris robertiana (Hoffm.) C. 
Chr.) This species closely simulates the preceding, of 
which it may be a variety or only a form. Specimens 
are at hand from Winneshiek and Allamakee Counties. 
The specimens from Allamakee County are from Mr. 
Orr, who writes: “Very abundant where collected on 
mossy, partly shaded, rocky talus at foot of, and on 
north side of high and steep bluff along south side of 
Yellow river, the only station I know in Allamakee 
County.” 
PHEGOPTERIS HEXAGONOPTERA (Michx.) Fée. (Dry- 
opteris hexagonoptera (Michx.) C. Chr.) Allamakee 
County, my specimen is from Mr. Orr, who reports: 
“A few scattering plants on north side of wooded bluff, 
Waukon Junction, Iowa.” 
CAMPTOSORUS RHIZOPHYLLUS (L.) Link. Winneshiek, 
Allamakee, Clayton, and Dubuque Counties; rocky 
limestone soil in woods; frequent; often growing on the 
