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