Catillaria nigroclavata Catillariaceae
Catillaria nigroclavata

Growth type crustose
Chemical results negative

Found on both rough and smooth barked deciduous trees and can be locally common (but easily missed) on twigs in young woodland

The thin, often inapparent thallus is pale grey to dark grey-brown with small dark brown to black apothecia (0.15-0.3mm). Asci are 8-spored, the spores 1-septate, 8-10 x 2.5-3 Ám. Hymenium colourless, the paraphyses with dark, swollen tips. Micrograph below.

Similar: Catillaria lenticularis is saxicolous, C. chalybeia has larger spores


Catillaria nigroclavata

Catillaria nigroclavata

Microscope photograph
Catillaria nigroclavata

Catillaria nigroclavata
Catillaria nigroclavata
Kingston Lacyand Broadstone, Dorset. November 2016 and 2023

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