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Ring Lichen
Evernia esorediosa
Evernia esorediosa is a species of lichen in the family Parmeliaceae. It has no soralia, but many ascocarps.
In a study it has been found that its mycobiont contains hypostrepsilic acid, a dibenzofuran. It made up 3.2% of the dry weight. In its lichenized condition divaricatic acid, an orcinol depside, made up 1.9% of Evernia esorediosa's dry weight. Furthermore it contains usnic acid.
From the article Evernia esorediosa on Wikipedia (CC BY-SA), quoted section by section
Range & habitat
Specimens have been found in Japan, Russia, the United States of America, Canada and Mongolia. It is common in larch forests in the cryolithozone.
Wikipedia: “Distribution”
What it does
E. esorediosa favours to inhabit conifers. It is an epiphyte of the Dahurian larch. Usnic acid is found in the needles, bark, cambium and roots of Dahurian larchs affected by E. esorediosa. This has an allelopathic effect in the form of slower growth by disturbing the metabolic processes in the needles of the tree.
== References ==
Wikipedia: “Ecology”
Where it lives
Recorded sightings
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geo-referenced records in GBIF, from museums, herbaria and field observers.
Drag the globe to turn it. Dots are where records exist, not a range map; darker means more records.
In the stacks
Searching the stacks…
Every page naming Evernia esorediosa in the Biodiversity Heritage Library →
This page is assembled live from iNaturalist, GBIF, Wikipedia, the Source Library and the Internet Archive. It is not yet part of the hand-edited codex. iNaturalist taxon 220029.