LichenIreland
  • Agonimia allobata (Stizenb.) P.James
Agonimia allobata
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This is an easily overlooked crustose epiphyte with a minutely granular, grey-green or brown thallus and spherical discs (perithecia) that deflate slightly when dry. It occurs on mature, mossy trees especially in long-established woodland. It is probably very thinly scattered and is almost certainly under-recorded in Ireland.

Key characteristics

  • The grey, granular thallus overgrowing moss on mature trees with comparatively large perithecia (0.10-0.22mm diam.) helps to suggest candidates for this species
  • Microscopic measurement of the spores is required to confirm it, though there are few similar species with flask-shaped fruits (perithecia) that occur in the same habitat. Agonimia octospora has a distinctive minutely-scaly thallus.

Original text submitted by Simon Davey

 Simms, M. J., (2016). Agonimia allobata (Stizenb.) P.James. [In] LichenIreland.
http://www.habitas.org.uk/lichenireland/species.asp?item=20618 Accessed on 2017-11-18.