Ophioglossum vulgatum (L.) "Wabash county, a single plant." _Schneck._
(P.) Probably elsewhere, but easily overlooked.
Botrychium obliquum (Muhl.) In open woods, Cook Co., rare. "S. Illinois.
_Vasey_, _Schneck_." (P.) Peoria Co., _V. H. Chase_. Starved Rock.
_J. H. Ferriss._
Botrychium obliquum dissectum. (Spreng.) Peoria Co., _V. H. Chase_.
Botrychium virginianum. (L.) Common in rich woods in the northeastern
part of the state, and probably throughout. It often occurs in
colonies, sometimes of a dozen or more plants. In woods along Lake
Michigan it readies a height of two feet.