
''Athyrium angustum'' is known as the northern lady fern, native to northeastern North America. It was long included in the superspecies ''Athyrium filix-femina'', but is now largely recognized as a distinct species.
''Athyrium angustum'' has a more southern counterpart, ''Athyrium asplenioides''. This species, the southern lady fern, has a broader frond, especially at the base.
Similar species: Polypodiales
By Christine Young
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Uploaded May 7, 2019. Captured May 6, 2019 12:14 in 131 Concord St, Framingham, MA 01702, USA.
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