Distinctive bright green head.
No interactions present.
London Docklands linked (Canary Wharf) I'm not sure what environment to select.
A lichen ménage à trois - http://science.sciencemag.org/content/353/6297/337
Some say it's time to throw the textbook understanding of lichens out the window.
"Now there will be more chaos, more confusion in lichenology ,...."
Lat/Lng: 51.4916, -0.0166
OS grid ref: TQ377788
Marina off Millwall, between the houses.