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Calicium viride  Pers.

Synonyms:

Family: CALICIACEAE

Habitat: Ubiquitous

Description

   Thallus crustose, rather thick, granulose, bright green, greenish, yellow-green turning to green-brownish when old. Often sterile and, in that case, hardly recognizable; otherwise with small apothecia, 0.2-0.7 mm diam., black in section, heads occasionally powdered in brown, on apices of stalks 1-2 mm high. Asci clavate, formed singly from ascogenous hyphae with croziers, dissolving at an early age. Ascospores ellipsoid, brown, surface with  irregular cracks, 1-septate, constriction at septum level, brown-blackish, surface cracked to rugose (sometimes but seldom at full maturity, with spirally distributed winged excrescences), 11-14 x 4-5 µm according to literature, (10) 12-15 x 5-7 µm according to our measures. Photobiont : Trebouxia. Thallus: C-, K-, KC-, Pd-, UV+  bright orange. Rather common species (but often understated) on barks of deciduous trees or conifers. Some specimens with a green thallus, granulose, only partly developed  may resemble Calicium salicinum, which has thinner thallus, cylindrical asci and smaller spirally wrinkled ascospores.







Calicium viride Plogonnec 1
Bernard BOUFFINIER



Calicium viride Plogonnec 2
Bernard BOUFFINIER



Calicium viride Plogonnec 3
Bernard BOUFFINIER



Calicium viride Scaër
Bernard BOUFFINIER



Calicium viride Châteaulin
Bernard BOUFFINIER



Calicium viride Belgique 1
Jacques HAINE



Calicium viride Coupe apothécies Belgique 2
Jacques HAINE



Calicium viride Asques eau Belgique 3
Jacques HAINE



Calicium viride Asque Lugol Belgique 4
Jacques HAINE



Calicium viride Asques et spores Bleu Coton Belgique 5
Jacques HAINE



Calicium viride Spores eau Belgique 6
Jacques HAINE



Calicium viride Spore partiellement ailée en spirale eau Belgique 7
Jacques HAINE



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