United States, Minnesota, Aitkin, Pliny State Wildlife Management Area. About 32 km (20 miles) S-SE of McGregor at a heading of 164 degrees.
46.33161 -93.19705
T044N R23W sec01
Soil is mesic to somewhat wet loam.
Other ferns collected here on this date include: Pteridium aquilinum var. latiusculum, Dryopteris carthusiana, Botrypus virginianus, Equisetum sylvaticum, Osmunda claytoniana.