A small delicate spleenwort (fern) that resembles rue, growing on walls and rocks in both Europe and North America and sensitive to atmospheric pollution.
- Asplenium ruta-muraria, family Aspleniaceae.
- In the British Isles, wall rue was considered a specific remedy for scrofula many years ago.
- The tiny A. ruta-muraria or wall rue is another lovely species in this genera.
- Look on the left for two kinds of ferns growing on the stone wall, these are the tiny wall rue and slightly larger maiden hair spleenwort.
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