Verrucaria caerulea 1.jpg

Licence: 
Creative Commons Licence
Description: 

Verrucaria caerulea, growing on a limestone balustrade, Buckinghamshire.

Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith