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Evernia prunastri grows shrub-like on trees. The yellow-green lichen grows up to 10 cm. It consists of up to five millimeters wide, bushy, branched bands with a light underside. At the edges these break up dusty (Sorale). Apothecia (with a shiny brown disc) are seldom formed.
In Europe, it is often found on the acidic bark of deciduous and coniferous trees , especially oaks ( Quercus ), from northern Fennoscandia to the Mediterranean region to the tree line . In locations with open winds, it can cover the flanks of the tree trunks with a thick lichen carpet. It is one of the most common shrub lichens and is only absent in areas with a high level of air pollution and in air-dry locations. The species is considered endangered in Germany.
Oakmoss is a basic fragrance in perfumery and belongs to the basic accord of bergamot-labdanum-oakmoss, which defines the perfume genre Chypre . In rare cases it is allergic; its use was severely restricted by EU regulations, which led to the reformulation and deterioration of the formulations of many classic perfumes. In the south of France, the species is collected in large quantities in order to obtain what is known as “mousse de chêne” or “mousse odorante” in an elaborate distillation process .
- Marbach / Kainz: BLV Naturführer Moose, Fern und Lichen, Munich 2002, ISBN 3-405-16323-4
- “Oak moss contains resin acids that can irritate the skin. In very rare cases, severe skin reactions occur. […] No sooner had the EU restricted the use of oak moss than it turned out that the villain was the cheaper tree moss, which is used to stretch the oak moss. ” Luca Turin : Credit where credit is due. In: NZZ Folio . Issue 4, 2007.