silvery spleenwort, n.
North American fern with narrow fronds on yellowish leafstalks
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Athyrium pycnocarpon Diplazium pycnocarpon glade fern narrow-leaved spleenwort silvery spleenwort
fern with elongate silvery outgrowths enclosing the developing spores
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Athyrium thelypteroides Deparia acrostichoides silvery spleenwort