Botrychium oneidense (Gilbert) House
Blunt-lobed grape fern
Habitat: Rich, moist woods and swamps
Range: New Brunswick to Minnesota, south to North Carolina and Indiana.
Aids to Identification: Botrychium oneidense has the ultimate leaf segments more rounded and more obscurely toothed than in B. dissectum. Also, B. oneidense has overwintering green leaf blades, while they will turn a bronzy color in autumn in B. dissectum.
Ecological characteristics: Coming soon.
Phenology: A fern (perennial).
Synonyms: Botrychium dissectum Spreng. var. oneidense (Gilbert) Clute; Botrychium multifidum (Gmel.) Rupr. var. oneidense (Gilbert) Farw.; Sceptridium oneidense (Gilbert) Holub.
Known Distribution in Maine: This rare plant has been documented from a total of 1 town in the following counties: CYork.