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Scoliciosporum umbrinum (Ach.) Arnold

Synonyms:

Family: SCOLICIOSPORACEAE

Habitat: Ubiquitous

Description

    Thallus crustose, highly variable, thin to thick, smooth to rugose, uneven and sometimes nodular, more or less cracked, grey-greenish, brown-greenish, blackish, with sometimes patches of chocolate-brown. Apothecia frequent, sessile, 0.3-0.8 mm diam., disc flat and smooth, then convex and slightly rugose, brown-redish, brown-blackish, blackish, exciple usually excluded. Ascopores acicular, and spirally twisted, 3-7-septate, 20-30 x 2-3 µm. Photobiont: Chlorococcoid. Chemical spot tests negative. Probably widespread but inconspicuous and consequently understated. On acid rocks, walls, soils, wood, rust, with wide ecological amplitude. N.B. Highly variable and sometimes difficult to identify. Most probably common but most often ignored.







Scoliciosporum umbrinum Sur un maillon de chaîne en fer 1
Jacques HAINE



Scoliciosporum umbrinum Monthermé 1
Jacques HAINE



Scoliciosporum umbrinum Monthermé 2
Jacques HAINE



Scoliciosporum umbrinum Sur mur. Coadry 2
Bernard BOUFFINIER



Scoliciosporum umbrinum Sur mur. Coadry 1
Bernard BOUFFINIER



Scoliciosporum umbrinum Asque Monthermé 3
Jacques HAINE



Scoliciosporum umbrinum Spores Monthermé 3
Jacques HAINE



Scoliciosporum umbrinum Sur un maillon de chaîne en fer 2
Jacques HAINE



Scoliciosporum umbrinum Loperhet 1
Joël QUERELLOU



Scoliciosporum umbrinum Loperhet 2
Joël QUERELLOU



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