bladder fern

noun

Definition of bladder fern

: a fern of a genus (Cystopteris) characterized by a hooded or bladderlike indusium especially : a common North American fern (C. fragilis) with finely dissected fronds

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“Bladder fern.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/bladder%20fern. Accessed 25 Oct. 2020.

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