Montane. Rocks. Summer.
Pagosa Springs area.

Dryopteris filix-mas leaf blades are seven-to-forty inches long, easily attracting attention in their shaded niches in rocks or narrow canyon bottoms.  Dryopteris filix-mas is a close relative of Christmas Fern, Polystichum spp.

"Dryopteris" is derived from the Greek "drys" ("oak") and "pteris" ("fern").  Latin gives us both "filix" for "fern" and "mas" for "male".