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Lepra albescens (Huds.) Hafellner morpho albescens

 

=Pertusaria albescens (Huds.) Choisy & Werner var. albescens

Synonyms:

Pertusaria albescens (Huds.) Choisy & Werner var. albescens



Family: OCHROLECHIACEAE

Habitat: Ubiquitous

Description

    Thallus crustose, thin to moderately thick, slightly cracked, whitish when dry, grey-greenish to greenish when moist, distinctly delimited, margin poorly zoned, thallus covered with large, rounded soralia, 1-4 mm diam., typically flat and concave with a conspicuous margin (almost apothecia-like), hosting granular soredia, pale grey-whitish, whitish. Apothecia very rare, 2-4 mm diam., disc whitish, pruinose, exciple white. Ascii 1-2-spored. Ascospores 170-300 x 50-115 µm. Soralia: C-, K-, KC-, Pd-. Not especially maritime, on bark of trees, mostly aligned trees along roads or in orchards or in open woodlands. Not to be confused  with Lepra amara of which the soralia are globose and markedly bitter and Ochrolechia turneri of which the soralia are C+ yellow. N.B. Pertusaria albescens var. corallina (Zahlbr.) Laundon  differs from the canonical type by its verrucose and nodulose soralia, its minute isidia more or less coralloid and potentially covering the whole thallus and its roundel-like zoned margin.*







Pertusaria albescens Han sur Lesse 1
Jacques HAINE



Pertusaria albescens Han sur Lesse 2
Jacques HAINE



Pertusaria albescens Lesteven 1
Alain GERAULT



Pertusaria albescens var. albescens Plounéour-Ménez
Bernard BOUFFINIER



Pertusaria albescens var. albescens Crozon 1
Bernard BOUFFINIER



Pertusaria albescens var. albescens Crozon 2
Bernard BOUFFINIER



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