About

Like other lichen species, tree lungwort is made up of multiple organisms – a fungus and two algae species in this case. These organisms work in partnership. The fungus builds the structure, providing shelter for the algae. In return, the algae photosynthesise to provide food for the fungus.

This type of lichen was almost lost during the Industrial Revolution. It now only survives where there is clean air, with humid and still conditions – mainly ancient woodlands in the west of the UK. It usually grows on the bark of mature broad-leaved trees. Although its GB conservation status is Least Concern, it is scarce and threatened away from the west of Scotland.

Lungwort lichens are so named because they resemble the inside of a lung. Because of this it was believed they had medicinal properties to treat lung disease in medieval times. They have also been used to make dyes, perfumes and beer.