Evernia mesomorpha

Evernia mesomorpha is a fruticose lichen that forms flattened, branching structures attached to tree bark, developing gray-green to brownish tufts with a hanging growth habit. Its shrubby, three-dimensional branching form distinguishes it from flat crustose or leafy foliose lichens growing on similar substrates.

Both species share the genus Evernia and grow as fruticose epiphytes on bark, but E. mesomorpha tends to form denser tufts with more flattened branches compared to the strap-like lobes typical of E. prunastri. E. prunastri is also far more widely commercialized in perfumery, while E. mesomorpha is less commonly discussed in that context.

Evernia mesomorpha is fruticose, meaning it has a shrubby, three-dimensional branching structure rather than the crust-like (crustose) or leaf-like (foliose) forms seen in other lichens. This growth habit gives it a tufted, pendulous appearance that hangs from the bark of trees.

No, E. mesomorpha is an epiphyte, using tree bark only as a physical surface for attachment while obtaining water and minerals from the atmosphere and surrounding air. It does not penetrate or extract nutrients from the host tree, so it causes no harm to the bark it colonizes.