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Dirina fallax
Dirina fallax is a species of saxicolous (rock-dwelling), crustose lichen in the family Roccellaceae. It is found in the western Mediterranean, the Atlantic coasts of both Africa and Europe (extending from Scotland to Morocco), and central Europe, where it grows on siliceous and acidic rocks. In 2017, it was reported from the Abrau Peninsula in Russia.
From the article Dirina fallax on Wikipedia (CC BY-SA), quoted section by section
Description
The lichen has a creamy greyish-brown, crustose thallus with a somewhat roughened surface (0.1–1.5 mm thick), and a white, chalk-like medulla. When soralia are present (typically when apothecia are absent), they are punctiform to maculate. If apothecia are present, they have a circular outline and a diameter of 0.1–2.0 mm; the apothecial disc is white-grey, pruinose, and encircled by a thalline margin. Ascospores measure 18–24 by 5–6 μm. Dirina fallax contains the lichen products erythrin and lecanoric acid, as well as two unidentified substances. The expected results of chemical spot tests are C+ (faint red) on the thallus surface, C− on the medulla, and C+ (red) on the disc.
== References ==
Where it lives
Recorded sightings
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geo-referenced records in GBIF, from museums, herbaria and field observers.
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In the stacks
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Every page naming Dirina fallax 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 1639723.