Two forms of wall rue (Asplenium ruta-muraria). The plant on the right reminds me of New Zealand blanket fern. Photo credit: Lara Shepherd | Te Papa's Blog
Asplenium ruta-muraria - Wikipedia
Wildflower Wall-rue Irish Wild Flora Wildflowers of Ireland
Wildflower Wall-rue Irish Wild Flora Wildflowers of Ireland
Snakeroot Botanicals || Indy's Neighborhood Garden Center & Plant Shop
Asplenium ruta-muraria, Wall-rue
Asplenium ruta-muraria (wall-rue spleenwort): Go Botany
Wall-rue - Encyclopedia of Life
Asplenium ruta-muraria (wall-rue spleenwort): Go Botany