Cystopteris fragilis

Superficially it looks like Woodsia scopulina, or Cliff fern, but there are differences in the sori. Thanks to Carl Rothfels for the identification.

cystopteris fragilis 1 graphic

Called the brittle bladder-fern or common fragile fern.
Photograph from the Sierra Nevada, California. Image 1

cystopteris fragilis 2 graphic

Underside of the brittle bladder-fern or common fragile fern.
Photograph from the Sierra Nevada, California. Image 2

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