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Lichen: Leptogium teretiusculum

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Leptogium teretiusculum

Leptogium teretiusculum

Leptogium teretiusculum showing a typcal view of the thallus.

Leptogium teretiusculum showing a typcal view of the thallus.

Vice County Web Map: Leptogium-teretiusculum

Vice County Web Map: Leptogium-teretiusculum

Name: Leptogium teretiusculum (Wallr. )Arnold (1892)

Pronunciation:Leptogium teretiusculum

Conservation Evaluation: Least Concern

Body Type: Foliose – Crustose

Description: Brown to grey thallus; smooth when wet; it forms small patches generally less than 15mm diameter. When dry it has a very shrivelled appearance. The thallus consists of many coral-like ascending structures forming dense mats. Apothecia are very rare; discs are concave to flat. Isidia are common.

Chemical Tests: All negative.

Nature Notes: Found associated with old woodlands, particularly on trees with cracked rough basic bark. Also found on calcareous rocks and mortar-rich walls.

Similar species:

Leptogium schraderi: a similar species also with few apothecia.

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.