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Lichen: Leptogium schraderi

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The thallus forms small radiating patches.

The thallus forms small radiating patches.

Close up of the finger like projections.

Close up of the finger like projections.

Vice County Web Map Leptogium-schraderi

Vice County Web Map Leptogium-schraderi

Name: Leptogium schraderi (Ach.) Nyl. (1856)

Pronunciation:Leptogium schaderi

Conservation Evaluation: Least Concern

Body Type: Foliose – Crustose

Description: Dark red-black to green-brown and glossy when wet; it forms small patches generally less than 18mm in diameter and 5mm thick. When dry it has a very shrivelled appearance. The thallus consists of many finger-like ascending structures about 1 mm wide and 25mm long; often branched at the base. Apothecia are rare and when present are less than 1.5mm in diameter; discs are concave to flat. Granular isidia are common.

Chemical Tests: All negative.

Nature Notes: Found associated with calcareous grassland and on mortar-rich walls and in limestone areas and graveyards.

Similar species:

Leptogium turgidum: A similar species but with an abundance of apothecia and has globose rather than granular isidia.

Leptogium teretiusculum: An almost microscopic version of L. schraderi. Found in counties Kerry, Antrim and Donegal.

Vice county distribution map: See map

Link: Map this species on the Lichen Survey

Other species recorded in Ireland:

  • Leptogium biatorinum (Nyl.) Leight.
  • Leptogium brebissonii Mont.
  • Leptogium britannicum P.M.Jørg.& P.James
  • Leptogium burgessii (L.) Mont.
  • Leptogium cochleatum (Dicks.) P.M.Jørg.& P.James
  • Leptogium cyanescens (Rabenh.) Körb.
  • Leptogium diffractum Kremp.ex Körb.
  • Leptogium gelatinosum (With.) J.R.Laundon
  • Leptogium hibernicum Mitchell ex P.M.Jørg.
  • Leptogium juressianum Tav.
  • Leptogium lichenoides (L.) Zahlbr.
  • Leptogium massiliense Nyl.
  • Leptogium palmatum (Huds.) Mont.
  • Leptogium plicatile (Ach.) Leight.
  • Leptogium schraderi (Ach.) Nyl.
  • Leptogium subtile (Schrad.) Torss.
  • Leptogium tenuissimum (Dicks.) Körb.
  • Leptogium teretiusculum (Wallr. )Arnold
  • Leptogium turgidum (Ach.) Cromb.

Text and images © Paul Whelan, 2009.