FERN Fiora or NORTHEASTERN IOWA 103 
EQUISETACEAE 
EQUISETUM ARVENSE L. Moist, sandy or clay soils, 
Waysides and waste places, common; Winneshiek, Alla- 
_ Inakee, Clayton, and Dubuque Counties. This species 
is extremely abundant on islands of the Mississippi 
River, often growing in the water. 
EQuIsETUM LAEVIGATUM A. Br. Common in moist, 
clayey soil, along waysides and banks; Winneshiek 
and Allamakee Counties. 
Equisretum rRosustum A. Br. This species has been 
found in Winneshick, Clayton, Dubuque, Clinton, and 
Jackson Counties. It occurs _ frequently in moist to 
wet soil, along banks. 
Poviserou HYEMALE L. Specimens from Winne- 
shiek, Allamakee, and Dubuque Counties have been 
referred here. 
LYCOPODIACEAE 
Lycorpopium Luciputum Michx. This species has 
been found in moist woods near Hesper, Winneshiek 
County. 
SELAGINELLACEAE 
SELAGINELLA RupPEsTRIS (L.) Spring. Dry, rocky 
soil; frequent at least locally; Winneshiek and Dubuque 
Coun ties. 
ISOETACEAE 
IsonTEs MELANoPopA J. Gay. This species has been 
collected in Clinton County. 
BetHany, NEBRASKA. 
