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bladder fern

any of several ferns of the genus Cystopteris, having pinnate leaves and growing in rocky areas.
Origin of bladder fern
1820-30; so called from the bladderlike indusium Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for bladder fern
  • Limestone outcrops near the top of the slope harbor populations of smooth cliff brake, bulblet bladder fern, and slender lip fern.
British Dictionary definitions for bladder fern

bladder fern

a small fern, Cystoperis fragilis, with graceful lanceolate leaves, typically growing on limestone rocks and walls
Word Origin
C19: named from the bladder-shaped indusium
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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