English: Wall-rue.
German: Mauerraute; Mauerstreifenfarn.
Clades: Pleurosoroideae;
Aspleniaceae;
Aspleniidae;
Pteridophyta;
Plants.
Region: Europe, East Asia, eastern North America.
Habitat: exclusively on limestone and calcareous rocks; very well-weathered and rather dry limestone outcrops.
Ecology: commonly invades masonry, common, in Europe.
Content: tannin; thiamine.
BotanyFern; very small; epipetric.
Leaves: bluish-green; heavily sub-divided; up to 12 cm long.