140 IOWA ACADEMY OF SCIENCES. 



Aspidiuin sp'nDtlusnni var infennci/iiiu), CornuH r/rcinafa, 

 Betula papyriferu and Betula lent a. In Iowa it is not 

 reported west of the Mississippi drainage basin, which is a 

 significant fact. There are undoubtedly many interme- 

 diate points between Boone county and the Mississippi 

 River, where it occurs. 



Iowa: Allamakee County "common on ledges of St. 

 Peter sandstone" — On-; Steamboat Jio<zk— Pa nwi el; Lan- 

 sing — il//.s',s' K'nig; Myron — Miss Kinr/; Wild Cat Den — 

 Reppert ; Winneshiek County — -Lewis; Eldora - T^ra^/er; 

 Ledges, Boone County — Fammel, Bessey — Miss F. Church. 



Southwest Wisconsin: La Crosse — P«/>/';//e/; La Crosse, 

 sandstone rock, tamarack marsh — Fammel; Clalesville — 

 Pamniel; Bloomingdale — Miss Fammel and Miss King; 

 Devil's hdikQ— Fammel. 



Southeast Minnesota: Pine Creek— Fammel. 



TRIBE PTERIDiE. 



Adiantum pedatum L. Sp. PI. 1095. 175B. 



The Maiden-hair Fern has a wider distribution than most 

 of our ferns. It is common to both the Mississippi and 

 Missouri basins and tributaries; but the reported localities 

 from western Iowa are not nearly so numerous as one might 

 expect. It occurs in deep, rich woods, being associated 

 with C ystopteris fragilis, but less frequent than that fern. 



Iowa: Wildcat Den- -Reppert, Ball; Keokuk — Rolfs; 

 Estherville Crafty ; Indianola — Carver ; Monticello — 

 Bessey; Lansing — Miss King; Myron -Miss King; Sedan — 

 Famtnel; Eldora — Frazier; Ames — Hitchcock; Steamboat 

 Rock — Fammel, Miss King; Boone — Fammel; Fifteen 

 Mile— Paddock. 



Southwestern Wisconsin: Bloomingdale— ^il//ss Fam- 

 mel and Miss KiJig; La Crosse — Fammel. 



Fteris aqnilina h. Sp. PI. 1075. 1753. 



The common brake is distributed much the same as 

 Polypodium vulgare, but is far less frequent. It is confined 



