A genus of small ferns with delicate fronds, commonly found in moist rocky areas and woodlands.
From Greek 'kystis' (bladder) + 'pteris' (fern). Named for the bladder-like covering (indusium) that protects the fern's spore clusters, unlike most other ferns.
The bladder fern's spore packets have a special little hood that pops open to release spores—it's like nature's designed a tiny explosive package that fires its genetic material into the air!
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