Erigeron karvinskianus , Mexican fleabane , Penzance 25 May 2022,  

Note also on the wall the various lichens , including the bright orange ones.. an indicator of the very clear air in Penzance, being so near the end of the Cornish peninsula. If you want to admire this wall go to grid reference 50°7'28.9"N, -5°32'16.1"W