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Lichen: Lecidea lithophila

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Lecidea lithophila

Name: Lecidea lithophila [(Ach.) Ach (1814)]Lecidea lithophila

Pronunciation: Lecidea lithophila

Conservation Evaluation: Least Concern


Description: The thallus is cracked (areolate), smooth to slightly undulating and grey in colour, frequently stained rust-red from the iron in the rock substrate. The prothallus is indistinct. Apothecia range from 0.5 mm to 1.5 mm in diameter (some may reach 2 mm diam.) The disc is dark brown to black, flat to convex; this gives the apothecia the appearance of black buttons. Apothecia are sessile with a black disc that looks brown when wet. Spores are ellipsoidal and packed 8 per ascus.

Chemical Tests: All reactions negative.

Nature Notes: Found on siliceous rocks rich in iron and exposed to strong sunlight (south facing) and regular wetting/drying. Grows fast enough to be found on scree.

Vice County distribution map of Lecidea lithophila: See Map

Link: Map this species on the Lichen Survey

Other species recorded in Ireland

  • Lecidea ahlesii (Körb.) Nyl.
  • Lecidea auriculata Th.Fr.
  • Lecidea confluens (Weber) Ach.
  • Lecidea diducens Nyl.
  • Lecidea doliiformis Coppins & P.James
  • Lecidea erythrophaea Flörke
  • Lecidea fuliginosa Taylor
  • Lecidea fuscoatra (L.) Ach.
  • Lecidea hypnorum Lib.
  • Lecidea hypopta Ach.
  • Lecidea lactea Flörke ex Schaer.
  • Lecidea lapicida (Ach.) Ach.
  • Lecidea paupercula Th.Fr.
  • Lecidea phaeops Nyl.
  • Lecidea plana (J.Lahm) Nyl.
  • Lecidea pycnocarpa (Körb.) Ohlert
  • Lecidea pycnocarpa forma sorediata Coppins & Fryday
  • Lecidea sanguineoatra auct.
  • Lecidea turgidula Fr.

Text and images © Paul Whelan, 2009.