Placopsis lambii Hertel & V. Wirth

in Wirth, Die Flechten Baden-Württembergs: 511, 1987
Synonyms:
Distribution:
Description: Thallus crustose-placodioid, the peripheral part with 0.5-1.5 mm wide, elongated, contiguous, radiating lobes, sorediate, pinkish white to pale grey, shiny throughout, forming up to 5 cm wide, orbicular rosettes, the central part rimose-areolate, with more or less concentrically arranged, blackish (rarely greenish), 0.3-0.6 mm large, flat to convex, maculiform soralia appearing as large fleck-like scars, and sometimes with small, globose or distorted, not distinctly lobed, blackish to brownish, 1-3 mm wide cephalodia. Cortex paraplectenchymatous; medulla white, I-. Apothecia rare, lecanorine, sessile, 0.5-1.5 mm across, with a flat, pinkish brown to dark reddish brown disc, and a very thick, transversally plicate, persistent thalline margin. Proper exciple very thin, colourless; epithecium yellowish brown; hymenium colourless, I+ blue; paraphyses easily made free, thin, branched and anastomosing, submoniliform in upper part; hypothecium colourless. Asci 8-spored, cylindrical to narrowly clavate, amyloid, with a K/I+ pale blue tholus and a narrow, internal darker blue cap, approaching the Trapelia-type, but without an amyloid ring-structure. Ascospores 1-celled, hyaline, ellipsoid, 14-18(-19) x 7-11 µm. Photobiont chlorococcoid; cephalodia with Stigonema. Spot tests: K-, C+ red, KC+ red, P-. Chemistry: gyrophoric and 5-O-methylhiascic acids (major), sometimes with traces of lecanoric and hiascic acids.
Note: a suboceanic species, ecologically similar to Lecanora subaurea, found on low outcrops and small boulders of metal-rich siliceous rocks in sites with a humid climate. Most widespread in Western Europe, but also known from a few localities, all below treeline, in the Eastern Alps (Austria). To be looked for in the Italian Alps, especially in the Insubrian region.
Growth form: Crustose placodiomorph
Substrata: 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)
Species of metal-rich rocks
Pioneer species

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Predictive model
Index Fungorum GBIF

Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=406&lang=en
France, Le Drennec


Leif Stridvall - Source: http://www.stridvall.se/la/galleries.php


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1362&lang=en
France, Commana
sorediate form with few apothecia


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1362&lang=en
France, Commana
sorediate form with few apothecia


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1362&lang=en
France, Commana
sorediate form with few apothecia


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1362&lang=en
France, Commana
sorediate form with few apothecia


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1362&lang=en
France, Commana
sorediate form with few apothecia


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1362&lang=en
France, Commana
sorediate form with few apothecia


Joël Querellou - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=406&lang=en
France, Le Drennec


Joël Querellou - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=406&lang=en
France, Le Drennec


Joël Querellou - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=406&lang=en
France, Le Drennec


Joël Querellou - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=406&lang=en
France, Le Drennec


Joël Querellou - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=406&lang=en
France, Le Drennec


Joël Querellou - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=406&lang=en
France, Lac Drennec


Joël Querellou - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=406&lang=en
France, Lac Drennec


Joël Querellou - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=406&lang=en
France, Lac Drennec


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=406&lang=en
France, Le Drennec


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=406&lang=en
France, Le Drennec


Leif Stridvall http://www.stridvall.se/la/galleries.php


Alain Gerault - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=406&lang=en
France, Commana


Alain Gerault - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=406&lang=en
France, Roc'h Trédudon


Alain Gerault - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=406&lang=en
France, Roc'h Trédudon


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=406&lang=en
France, Le Drennec


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=406&lang=en
France, Le Drennec


Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=406&lang=en
France, Ardennes


Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=406&lang=en
France, Ardennes


Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=406&lang=en
France, Revin


Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=406&lang=en
France, Revin


Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=406&lang=en
France, Revin


Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=406&lang=en
France, Revin


Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=406&lang=en
France, Revin


Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=406&lang=en
France, Revin