Lichen: Agonimia tristicula
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Squamules of Agonima tristicula. Thanks to Mike Sutcliffe for use of his photo.
Name: Agonimia tristicula (Nyl.) Zahlbr.
Pronunciation: Agonimia tristicula
Conservation Evaluation: Least Concern
Body Type: Squamulose
Squamules of Agonima tristicula, yellow-green when wet.
Description: The thallus is composed of squamules (0.1 to 0.5mm in diameter) that appear dull green to brown when dry and bright green when wet. Crowded in between the squamules are black matt textured barrel-shaped perithecia.
Chemical Tests: No spot test chemical reactions.
Nature Notes: Found on walls in crevices, particularly with moss. Likes a variety of rock types including basalt, hard limestone, mortar and a form of metamorphosed limestone called serpentine. Common through Ireland, although it appears missing from a distinctive band down the East coast of Ireland.
Vice county distribution map for Agonimia tristicula: See Map
Link: Map this species on the Lichen Survey
Other species recorded in Ireland:
- Agonimia allobata (Stizenb.) P.James
- Agonimia gelatinosa (Ach.) M.Brand & Diederich
- Agonimia octospora Coppins & P.James
Text and images © Paul Whelan, 2009.