Name: Wall Rue
Scientific name: Asplenium ruta-muraria
Category: Moss and Lichen
Nature Stars: 40
About: A small fern, growing on rocks, walls and mossy branches.
How to identify: An easily recognisable fern, with strange club-shaped 'leaflets' on the frond. One of the commonest ferns on walls.
Photograph credit: pilaretxebarria