LichenIreland
  • Lepraria rigidula (de Lesd.) Tønsberg 

There are no records for this species at present.

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This grey powder lichen lacks the bluish component of other common species of the genus and is composed of large, evenly-sized granules (0.1–0.2mm diam.); it has no medulla and is soft to the touch. Through a lens you will see that each grain has some hyphal threads projecting from it like the antennae of a TV aerial. The thallus is K+ yellow. The species is widespread in Ireland on acid rocks and trees.

Key characteristics

  • Powdery granules relatively large, grey with no hint of blue; medulla lacking
  • Grains with projecting hyphae; K+ dull yellow.

Original text submitted by Vince J. Giavarini

 Simms, M. J., (2016). Lepraria rigidula (de Lesd.) Tønsberg . [In] LichenIreland.
http://www.habitas.org.uk/lichenireland/species.asp?item=500065 Accessed on 2017-10-24.