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Wall-rue Fern
Asplenium ruta-muraria
Wall-rue is rare in Connecticut; it is listed as a threatened species.
• Family: Aspleniaceae
• Habitat: dry, shaded limestone outcroppings
• Height: 3-8 inches
• Location of spores: on veins on undersides of leaflets (see middle photo)
• Stipe (leaf stalk): smooth, delicate, grooved green; dark brown and scaly at base.
• Growth pattern: asymmetric clump
• Persistence: evergreen
next rare plant
Underside of a frond, showing the spore-bearing structures. The black dots are individual spores cases, each containing 64 spores.
True to its name, wall rue almost always grows on vertical rocky surfaces.