Irish lichens

Catillaria nigroclavata

Order: Lecanorales       Family: Catillariaceae

Species: Catillaria nigroclavata

Growth type crustose
Photos: On tree trunk, Aughinish, Co. Limerick, Ireland.

Thin, often inapparent thallus, pale grey to dark grey-brown. Apothecia 0.15-0.3mm, dark brown to black. Asci are 8-spored, spores 1-septate, 8-10 x 2.5-3 Ám. The hymenium is colourless and the paraphyses have dark, swollen tips. Microscope photographs below.

Found on both rough and smooth barked deciduous trees and can be locally common on twigs in young woodland.


Catillaria nigroclavata

Catillaria nigroclavata

Microscope photographs
Catillaria nigroclavata

Catillaria nigroclavata
Catillaria nigroclavata April 2012

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