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
Underside of a frond, showing the spore-bearing structures. The black dots are individual sporangia, each containing 64 spores.
True to its name, wall rue almost always grows on vertical rocky surfaces.