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Physcia biziana (A. Massal.) Zahlbr. var. biziana

Synonyms:

Family: PHYSCIACEAE

Habitat: Mediterranean

Description

        Thallus foliose, rosette shaped, 5-10 cm diam., lobate,lobes adjoining, 2-3 mm long, little overlapping, folded, except at their tips, not bent, upper surface pruinose, dull whitish when dry, greenish when moist (or turning green when sprayed with water - rather specific trait), lower surface dull whitish to pale brown, rhizines simple, pale to whitish. Apothecia usually numerous, more or less clustered towards the center, cup-shaped, sessile, 1-1.25 mm diam., disc concave to flat, pruinose to powdery, grey, grey-brown, grey-blue, grey-purple, exciple concolourous, smooth to convoluted. Ascii 60-70 x 20-25 µm according to our measures. Ascopores broadly ellipsoid, slate brown, 1-septate, 13-20 x 7-12 µm according to literature, 16-20 x 7-10 according to our measures. Photobiont: chlorococcoid. Cortex : C-, K+ yellow, KC+ yellow, Pd- ; medulla: C-, K-, KC-, Pd-. Thermophile, mediterranean, on bark of isolated trees or ornmental trees. Cf.: Physcia stellaris  of which the thallus is smaller, not turning greenish when moisten, and Physcia aipolia with an upper surface dotted with pseudocyphellae and medulla K+ yellow.







Physcia biziana Test Eau et KOH Nyons 7
Jacques HAINE



Physcia biziana Nyons 1
Jacques HAINE



Physcia biziana Nyons 2
Jacques HAINE



Physcia biziana Nyons 3
Jacques HAINE



Physcia biziana Nyons 4
Jacques HAINE



Physcia biziana & Physcia stellaris Comparaison Nyons 5
Jacques HAINE



Physcia biziana Nyons 6
Jacques HAINE



Physcia biziana Humide Nyons 6
Jacques HAINE



Physcia biziana Tests Nyons 8
Jacques HAINE



Physcia biziana Coupe apothécie Nyons 10
Jacques HAINE



Physcia biziana Microscopie apothécie Nyons 11
Jacques HAINE



Physcia biziana Asques Lugol Nyons 12
Jacques HAINE



Physcia biziana Asques Eau Nyons 13
Jacques HAINE



Physcia biziana Spores Eau Nyons 14
Jacques HAINE



Physcia biziana humide Pyrénées-Orientales Saillagouse S1
Bernard BOUFFINIER



Physcia biziana humide Pyrénées-Orientales Saillagouse S2
Bernard BOUFFINIER



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