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Verrucaria elaeina Borrer

Synonyms:

Family: VERRUCARIACEAE

Habitat: Oceanic zone

Description

   Thallus crustose, relatively thin, rimose and cracked, smooth surface but a bit rough in places where epinecral (dead cells) layer and medulla do not bear algae, pale grey-greenish, grey-whitish slightly brownish in places, sometimes with a thin prothallus, cream. Numerous perithecia, 1/4 to 3/4 burried in the thallus (but rarely completely), 0.2-0.4 mm diam. at their base, blackish, sometimes covered by the thallus at base, often reduced to a blackish ring with a grey-whitish center. Colorless ascospores, ellipsoid, without perispore, 16-22 x 7-9 µm according to the literature, 14-21 x 7-9 (10) µm according to our measurements. No significant chemical reactions. Rare (or unperceived?), growing on rocks a bit chalky or siliceous but not much acid, wet and shady, in oceanic forests particularly along seashore, also on old moisty walls, in the shed. Cf. Verrucaria praetermissa more aquatic and coming on more acid rocks.







Verrucaria elaeina sur mur humide Landaoudec 1
Bernard BOUFFINIER



Verrucaria elaeina sur mur humide Landaoudec 2
Bernard BOUFFINIER



Verrucaria elaeina sur mur humide Landaoudec 3
Bernard BOUFFINIER



Verrucaria elaeina sur mur humide Landaoudec 4
Bernard BOUFFINIER



Verrucaria elaeina sur mur humide Landaoudec 5
Bernard BOUFFINIER



Verrucaria elaeina Belgique Hermeton 1
Jacques HAINE



Verrucaria elaeina sur rocher humide Landévennec 2
Bernard BOUFFINIER



Verrucaria elaeina sur rocher humide Landévennec 3
Bernard BOUFFINIER



Verrucaria elaeina Belgique Hermeton 2
Jacques HAINE



Verrucaria elaeina Belgique Hermeton 3
Jacques HAINE



Verrucaria elaeina Belgique Hermeton 4
Jacques HAINE



Verrucaria elaeina Coupe Lugol Belgique Hermeton 5
Jacques HAINE



Verrucaria elaeina Coupe KOH Belgique Hermeton 6
Jacques HAINE



Verrucaria elaeina Asques Lugol Belgique Hermeton 7
Jacques HAINE



Verrucaria elaeina Spores KOH Belgique Hermeton 8
Jacques HAINE



Verrucaria elaeina Spores Bleu Coton Belgique Hermeton 9
Jacques HAINE



Verrucaria elaeina Spores Lugol Belgique Hermeton 10
Jacques HAINE



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