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Punctelia borreri

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description Punctelia borreri Overview

Punctelia borreri is a foliose lichen that commonly grows on the bark of trees in temperate habitats. Its gray-green thallus is marked by pale, lip-like pseudocyphellae, small exposed areas that interrupt the upper surface of the lobe. The species occurs across parts of Europe and has been used in lichen-based studies of atmospheric pollution because the condition and distribution of epiphytic lichens can reflect local air quality.

help Punctelia borreri FAQ

What does Punctelia borreri look like?

Punctelia borreri is a gray-green foliose lichen with leafy lobes growing on tree bark. Its upper surface is marked by pale, lip-like pseudocyphellae, which look like small exposed slits or patches.

Where does Punctelia borreri grow?

It is mainly corticolous, meaning it grows on bark in temperate habitats. Look for it on trunks and branches rather than on bare soil or exposed limestone.

What are the pale marks on Punctelia borreri?

The pale marks are pseudocyphellae, breaks or openings in the upper cortex of the lobe. Their lip-like shape is a useful identification clue for this Punctelia species.

Is Punctelia borreri a crustose or foliose lichen?

It is foliose, so its thallus has leaf-like lobes that are only partly attached to the bark. That growth form separates it from crustose lichens, which form a tightly bonded crust on the substrate.

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