Buellia aethalea Physciaceae
Buellia aethalea

Growth type crustose
Chemistry: K+/- yellow going red, C-, P+/- yellow-orange, UV- or negative

Often a pioneer species on acidic rocks, pebbles and dry stone walls.

Mosaic-forming areolate thallus, often less than 2cm diameter with black prothallus. Areoles pale to dark grey, sometimes tinged brownish. Apothecia abundant, immersed with small black discs. Pycnidia rare. Spores 1-septate 13-18 x 6-8 Ám. Microscope photographs below.

Similar: Buellia ocellata, greenish-yellow thallus, C+ orange.
Placopyrenium fuscellum, chemical reactions negative.


Buellia aethalea

Buellia aethalea

Buellia aethalea

Microscope photographs
Buellia aethalea, spores

Buellia aethalea, spores
Buellia aethalea
Sturminster Marshall and Lytchett Minster, Dorset. March 2014, December 2016

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