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Verrucaria prominula Nyl.

Synonyms:

Family: VERRUCARIACEAE

Habitat: Mesic supralittoral zone

Description

    Thallus crustose, very thin, evanescent, dull white, dull grey, grey-green (paler then the rock below), most often limited to an arachnean network characterized by its colour: grey-purplish to pale brown-mauve, sometimes absent on very friable rocks, prothallus poorly developed or absent. Perithecia usually large, prominent, and well developed (to 0.8 mm diam.) broadly conical, scattered, apex truncated, flattened or rounded, somewhat broadly opened below, resembling to an old volcano, rarely out of shape except in highly exposed areas. Ascospores, simple, oblong with rounded apices, 12-15 x 6-8 µm. Rare or understated unless specifically searched, on vertical, shaded faces or in dry crevices protected from sea spray, on schist rocks on seashores, and just above the sea spray zone.  N.B. Characteristic of slightly calcareous schists where this species grows in crevices running in vertical shaded faces.*

 

 







Verrucaria prominula Cap de la Chèvre 4
Bernard BOUFFINIER



Verrucaria prominula Cap de la Chèvre 3
Bernard BOUFFINIER



Verrucaria prominula Cap de la Chèvre 2
Bernard BOUFFINIER



Verrucaria prominula Cap de la Chèvre 1
Bernard BOUFFINIER



Verrucaria prominula Telgruc sur mer 2
Michel DAVID



Verrucaria prominula Thalle absent Pentrez 1
Bernard BOUFFINIER



Verrucaria prominula Saint-Nic 2
Bernard BOUFFINIER



Verrucaria prominula Saint-Nic 1
Bernard BOUFFINIER



Verrucaria prominula Saint-Nic 3
Bernard BOUFFINIER



Verrucaria prominula Habitat Telgruc sur mer 1
Michel DAVID



Verrucaria prominula Cap de la Chèvre 6
Bernard BOUFFINIER



Verrucaria prominula Pointe de Dinan 2
Bernard BOUFFINIER



Verrucaria prominula Pointe de Dinan 1
Bernard BOUFFINIER



Verrucaria prominula Telgruc sur mer 3
Michel DAVID



Verrucaria prominula Telgruc sur mer 4
Michel DAVID



Verrucaria prominula Argol 1
Bernard BOUFFINIER



Verrucaria prominula Argol 2
Bernard BOUFFINIER



Verrucaria prominula Pointe de Dinan 3
Bernard BOUFFINIER



Verrucaria prominula Pointe de Dinan 4
Bernard BOUFFINIER



Verrucaria prominula Crozon 1
Bernard BOUFFINIER



Verrucaria prominula Crozon 2
Bernard BOUFFINIER



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