ITALIC 8.0

Phaeophyscia stiriaca (Poelt) Clauzade & Cl. Roux ex Hafellner & Türk

Stapfia, 76: 155, 2001. Basionym: Physcia stiriaca Poelt - Portug. Acta Biol., B, 12, 1-4: 194, 1974.

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Distribution:

Description: Thallus foliose, heteromerous, dorsiventral, pale greenish grey, green when wet, forming up to 1 cm wide, usually irregular rosettes which are often confluent into larger patches, the lobes narrow, 0.5-1.5 mm wide, with labriform soralia on shorter and broader lobes, the soredia usually granular. Lower surface whitish to tan, often with irregular orange-pigmented patches, with simple, initially white, then dark rhizines. Upper and lower cortex paraplectenchymatous; medulla (at least in lower part) orange-red. Apothecia lecanorine, 0.5-2 mm across, sessile, with a black, usually epruinose disc. Epithecium brown; hymenium and hypothecium colourless; paraphyses slender, often forked in upper part, the apical cells clavate, with a thin dark cap. Asci 8-spored, clavate, the K/I+ blue tholus penetrated by a faintly amyloid apical cushion with parallel or diverging flanks, the wall K/I-, surrounded by a K/I+ blue outer layer, Lecanora-type. Ascospores 1-septate, brown, ellipsoid, 16-28 x 7-13 µm. Photobiont chlorococcoid. Spot tests: upper cortex K-, C-, KC-, P-; medulla K+ red in the pigmented parts. Chemistry: without lichen substances, except for skyrin in the pigmented parts of the medulla.

Note: a rare species resembling Ph. endophoenicea in the presence of skyrin in the lower medulla, but with a pale to tan lower surface and labriform soralia on ascending lobes, developing coarse soredia, found on bark of deciduous trees in lowland forests, with a few scattered records throughout Central Europe, including the Eastern Alps (Austria). To be looked for in Italy.

Growth form: Foliose, narrow lobed

Substrata: bark

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly asexual, by soredia, or soredia-like structures (e.g. blastidia)

pH of the substrata:

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Eutrophication:

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Poleotolerance:

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Altitudinal distribution:

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Predictive model

Detail from: https://gzu.jacq.org/GZU000286314

GZU000286314 - J. Poelt - Date 1972-11-19 Location Austria / Steiermark Label Windische Bühel, Steiermark: Stammgrund einer Fagus im Walde kurz NO Berghausen, Bez. Leibnitz Habitat Stammgrund einer Fagus im Walde

Detail from: https://gzu.jacq.org/GZU000286313

GZU000286313 - J. Poelt - Date 1972-05-07 Location Austria / Steiermark Label Windische Bühel, Steiermark: Laubwald SW Ehrenhausen, kurz vor Berghausen Habitat Laubwald Annotations GZU Inv.-Nr. 5-91 T.I. Esslinger (US) 1975: TLC 235-15: skyrin