Wall flora of Waterloo

Wall-rue (Asplenium ruta-muraria)

Sycamore (Acer pseodoplatanus) seedling

American Willowherb (Epilobium ciliatum)

Wall-rue (Asplenium ruta-muraria)

Smooth Sow-thistle ( Sonchus oleraceus)

Wall Screw-moss (Tortula muralis). Usually the most abundant wall moss, ubiquitous.

Grey-cushioned Grimmia (Grimmia pulvinata)

Some of the common plants of the walls of my local patch around Waterloo, you don't need to go far to see plants adapting to these harsh conditions.