Wall-rue - Asplenium ruta-muraria
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Species Description
Common and widespread throughout the UK. Habitat includes: Mortared walls, rocky places. Other names include: Wall Rue. Small tufted fern, the fronds triangular-ovate in outline and long stalked, Pinnae no more than 5 on each side, yet the lowest is itself pinnate, with up to 5 segments, pinnae quickly decreasing in complexity as you move towards the top. Other features: shape of segments very variable but each is toothed above the middle. Evergreen perennial.