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Arthonia radiata (Pers.) Ach.

Arthonia radiata  (Pers.) Ach.

Synonyms:

Family: ARTHONIACEAE

Habitat: Ubiquitous

Description

    Thallus crustose, rather thin, more or less immersed in the bark, 1 -3 cm in maximum length, and often mosaic-forming, smooth, white, pale grey, sometimes with a brown or olive tinge; thin brown prothallus. Apothecia more or less immersed in the thallus, flat or slightly erumpent, variably shaped, simple to long to substellate, 1-2 mm in diam., black, not pruinose. Ascospores colourless, oblong-ovoid to oblong, 3-(5) septate; apical cell not enlarged and sometimes narrowed, 12-18 x 4-6 µm. Photobiont : Trentepohlia. Chemical spot tests negative. Widespread and common mostly on smooth bark of many trees and shrubs in humid woodlands, notably Fraxinus.*





Arthonia radiata (Pers.) Ach.

Arthonia radiata Ardennes 1
Jacques HAINE

Arthonia radiata (Pers.) Ach.

Arthonia radiata Ardennes 2
Jacques HAINE

Arthonia radiata (Pers.) Ach.

Arthonia radiata Ardennes 3
Jacques HAINE

Arthonia radiata (Pers.) Ach.

Arthonia radiata Le Guilvinec 1
Bernard BOUFFINIER

Arthonia radiata (Pers.) Ach.

Arthonia radiata Le Guilvinec 2
Bernard BOUFFINIER

Arthonia radiata (Pers.) Ach.

Arthonia radiata Asque
Jacques HAINE

Arthonia radiata (Pers.) Ach.

Arthonia radiata Spores
Jacques HAINE

Arthonia radiata (Pers.) Ach.

Arthonia radiata Le Guilvinec 3
Bernard BOUFFINIER

Arthonia radiata (Pers.) Ach.

Arthonia radiata Le Guilvinec 4
Bernard BOUFFINIER

Arthonia radiata (Pers.) Ach.

Arthonia radiata Le Guilvinec 5
Bernard BOUFFINIER

Arthonia radiata (Pers.) Ach.

Arthonia radiata Le Guilvinec 6
Bernard BOUFFINIER

Arthonia radiata (Pers.) Ach.

Arthonia radiata sur Corylus Crozon 1
Bernard BOUFFINIER



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