Botrychium oneidense has broadly triangular blades, borne
near the ground. The pinnules are blunt at the tip and the margins
are finely or bluntly toothed. See a discussion of similar species
under B. multifidum.
Botrychium oneidense is found across the northeastern
U.S., ranging west barely through Wisconsin into Eastern Minnesota.
It is rare in Wisconsin where it is listed as a "special
concern" species. Most confirmed reports are from the
northern half of the state in moist forests with full or nearly