Cystopteris fragilis is a fern in the family Cystopteridaceae. Commonly known as brittlefern, it is
Cystopteris fragilis is a fern in the family Cystopteridaceae. Commonly known as brittlefern, it is native to most of the western United States, but is also found in the New England area as well. Brittlefern is most commonly found in riparian areas near streams and rivers and in between rock crevices. Like most ferns, it requires moist humid conditions to thrive. During warmer months, brittlefern goes into dormancy by letting the fronds dry up and turn brown. When the weather becomes more habitable for the brittlefern, the fronds rehydrate and become green again, restoring photosynthetic activity. -- source link
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