LichenIreland
  • Bacidia chloroticula (Nyl.) A.L.Sm.
Bacidia chloroticula
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This tiny lichen inhabits a host of neglected habitats such as rank grassland soils, small stones, bits of discarded brick, tree roots, cut stumps and fence post tops and is at its best after rain when the air is moist and humid causing the little discs to swell. The thallus is dull green and scurfy. Discs are a very pale, pinkish-brown, 0.2mm diameter at maximum but are often much, much smaller than this and can be almost invisible to the naked eye. Spores are acicular, up to three-septate. It could easily be growing on the panel fencing of your garden. South-east Ireland.

Key characteristics

  • Tiny, virtually invisible lichen with small, pale, pink-brown discs
  • Grows on stones, brick and broken pieces of wood in undisturbed areas of waste ground; the tops of untreated wooden fencing are a favourite habitat too.

Original text submitted by Vince J. Giavarini

 Simms, M. J., (2016). Bacidia chloroticula (Nyl.) A.L.Sm.. [In] LichenIreland.
http://www.habitas.org.uk/lichenireland/species.asp?item=18218 Accessed on 2017-12-11.