As classified in WFO snapshot
June 2022
Warning: older classification
variety
Asplenium filix-femina var. exile
D.C.Eaton
This variety name was first published in Rep. U.S. Geogr. Surv., Wheeler 6(Botany): 330 (1878)
This variety name has been reclassified since this snapshot. Its current preferred usage is a synonym .