Xanthoria, Greenwich Park - 2013

Xanthoria, Greenwich Park - 2013

Observation - Xanthoria, Greenwich Park - 2013. Description: But with a difference - note the one dark apothecium peeping out from amongst the golden apothecia, possibly Physcia sp.?

But with a difference - note the one dark apothecium peeping out from amongst the golden apothecia, possibly Physcia sp.?