Connecticut Plants
Wall-rue Fern
Asplenium ruta-muraria L.

Wall-rue is rare in Connecticut; it is listed as a threatened species.

  • Family: spleenwort (Aspleniaceae)
  • Habitat: dry, shaded limestone outcroppings
  • Height: 3-8 inches
  • Location of spores: on veins on undersides of leaflets (see middle photo)
  • Petiole (leaf stalk): smooth, delicate, grooved green; dark brown and scaly at base.
  • Growth pattern: asymmetric clump
  • Persistence: evergreen
  • Origin: native
Asplenium ruta-muraria L.
Asplenium ruta-muraria L.

Underside of a frond, showing the spore-bearing structures. The black dots are individual sporangia, each containing 64 spores.

Asplenium ruta-muraria L.

True to its name, wall rue almost always grows on vertical rocky surfaces.