a delicate fern, Asplenium ruta-muraria, that grows in rocky crevices and walls in North America and Eurasia
WordReference Random House Unabridged Dictionary of American English © 2025
wall′ rue′,
- Plant Biologya small, delicate fern, Asplenium rutamuraria, having fan-shaped leaflets and growing on walls and cliffs.
- 1540–50
Collins Concise English Dictionary © HarperCollins Publishers::
'wall rue' also found in these entries (note: many are not synonyms or translations):