LichenIreland
  • Cresponea premnea (Ach.) Egea & Torrente
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Cresponea premnea
© Robert Thompson
Cresponea premnea
© Mike Simms
Cresponea premnea
© Mike Simms
Cresponea premnea
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(Map updated: 11 August 2009)
 

Click here to view an interactive map of the Northern Ireland dataset as currently collated by CEDaR.
The map is generated through the NBN Gateway using their Interactive Mapping Tool.

 

This crustose epiphyte with a thin, grey to greenish thallus studded with hard, black, frosted discs (1-2mm diam.) on the bark of old, senescent oaks, is a characteristic species of very old trees in drier areas. It may occasionally spread to acid rock. In Ireland it has its headquarters in the south-east.

Key characteristics

  • The habitat and the large, often crowded, more or less rounded fruits that are usually grey-frosted, serve to indicate this species
  • Distinctive lichen preferring the slightly shaded dry side of trees. Often with Schismatomma decolorans.

Original text submitted by Simon Davey