146 IOWA ACADEMY OF SCIENCES. 



Iowa: Muscatine County, "hillside bogs near Cedar river, 

 Lake Township, and damp ravines in various places — infre- 

 quent" — Reppi'rt. 



AspidiuiH Goldiecnunii Hook. Edinb. Philos. Journal. 6: 

 333. 1822. 



Locally this is abundant, the Carboniferous sandstone, 

 growing with P/7iks Sfrobns. 



Iowa: Waukon Junction, "not common — found in deep 

 woods at foot of bluffs" — E. Orr; ^\&OY?i—Frazier; Wild 

 Oat Den — Pamniel and Repperf; Muscatine County— 7?e/;- 

 pert; Lansing — Miss King. 



Aspidium iiiayyinalc. Sw\ Syn. Fil. 50. 1S06. 



The occurrence of this fern ii> Iowa has not been reported 

 before. There are but three recorded localities in the state; 

 two in Ilardm County, and one in northeastern Iowa, near 

 Postville, some one hundred and seventy-five miles apart. 

 Though one of us diligently searched the country in La 

 Crosse, Trempleau and Vernon Counties, in Wisconsin, and 

 Houston County, in Minnesota, for this fern, it has not been 

 found. It is, however, abundant at Devil's Lake, Wiscon- 

 sin, where it occurs on granite rocks. It is certainly not 

 common except northward and eastward, and again in the 

 Ozark region in Missouri, where granite rock occurs. At 

 Steamboat Rock it is locally very abundant at the base of 

 sandstone ledges along the Iowa river. For Iowa, this is 

 an extremely rare fern. P/ie(/opter/s Drijopteris, Dierviila 

 trifida and lietala hnta are its associates. 



Iowa: Steamboat Rock — Fanuue/, Miss King; Eldora — 

 Frazicr; Postville, "woods" — Miss King. 



Aspidium acrostichoides Sw. Syn. Fil. 44. 1806. 



This northern fern is locally abundant in Muscatine, 

 growing with the Vitis cinerea in deep, rich woods. 



Iowa: Wild Cat Den — Shimel-, Ball; Muscatine— 7?^/;- 

 pert; Keokuk — Ehinger. 



iD 



