athyrium filix-femina

Athyrium filix-femina (L.) Mertens var.

Lady Fern (Athyrium filix-femina)

The gall develops in the terminal shoots of ferns, such as Broad buckler fern Dryopteris dilatata, Male shield fern Dryopteris filix-mas, Lady fern Athyrium filix-femina, and the Ostrich fern, Matteuccia struthiopteris.

Athyrium filix-femina (lady fern or common lady-fern) is a large, feathery species of fern native throughout most of the temperate Northern Hemisphere, where it is often abundant (one of the more common ferns) in damp, shady woodland environments and is often grown for decoration.