Physica & Xanthoria lichens on Ash tree

Physica & Xanthoria lichens on Ash tree

Observation - Physica & Xanthoria lichens on Ash tree. Description: Although I have ticked 'Gardens and Parks', there is no option for urban sitings. This tree is situated on a busy road, in close proximity to the London Westminster automatic Urban Monitoring station for air pollution

Although I have ticked 'Gardens and Parks', there is no option for urban sitings. This tree is situated on a busy road, in close proximity to the London Westminster automatic Urban Monitoring station for air pollution