Calicium glaucellum Caliciaceae
Calicium glaucellum

Growth type crustose
Chemical results: Thallus K+/- dull yellow

Common on lignum of fallen and standing dead trees and on tree stumps, also on fence posts and untreated timber.

Short-stalked black apothecia, usually with faint white pruina below head. Thallus very thin, usually immersed. Spores9-13 x 5-6 Ám. Pycnidia frequent, conidia 4-5 x 0.8 Ám. Photobiont Trbouxia. Micro photo below.

Similar: Calicium abietinum has black-brown apothecia, pruina absent.
Chaenotheca ferruginea, brownish spore mass, thallus pigment K+ red.
Microcalicium spp. have a greenish-black spore mass


Calicium glaucellum


Calicium glaucellum

Microscope photographs
Calicium glaucellum, spores


Calicium glaucellum, spores
Calicium glaucellum
On dead trunk. Holton Lee, Dorset. April 2014

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