Lepraria sylvicola Orange

in Slavíková-Bayerová & Orange, Lichenologist, 38: 507, 2006
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Distribution:
Description: Thallus leprose, diffuse, poorly delimited, bluish white to pale blue-grey, with a powdery appearance, the granules ecorticate, soredia-like, (24-)40-160 µm in diam. Medulla absent. Subthalline hyphae usually sparse, white to pale orange-brown, the pigmented ones K+ purple red. Spot tests: thallus K+ pale yellow, C-, KC-, P-, UV-; subthalline hyphae K+ purple red. Chemistry: roccellic and toensbergianic acids, atranorin (all major); subthalline hyphae with anthraquinones.
Note: this recently-described species appears to be fairly common in Western Europe, but it has recently been found also in the Eastern Alps (Austria); it mostly occurs on the bark of broad-leaved, more rarely coniferous trees, more rarely on siliceous rocks, on surfaces which are more or less sheltered from rain. To be looked for in Italy.
Growth form: Leprose
Substrata: bark and rocks
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly asexual, by soredia, or soredia-like structures (e.g. blastidia)
Most common in areas with a humid-warm climate (e.g. most of Tyrrenian Italy)
In underhangs rarely wetted by rain

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Predictive model

Photo uploaded by Paul Cannon CC BY-NC - Source: https://fungi.myspecies.info/all-fungi/lepraria-sylvicola


Source: Timdal, E. & Tønsberg, T. 2021. Lepraria lobificans (syn. L. santosii) and L. sylvicola new to northern Europe from Norway. Graphis Scripta 33 (3): 50–58. Oslo. ISSN 2002-4495. - CC BY-4.0
Lepraria sylvicola, Norway (BG-L-99170). Scale bar = 2 mm. Photo E. Timdal