• Lepraria diffusa diffusa (J.R. Laundon) Kukwa
Lepraria diffusa diffusa
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(Map updated: 11 August 2009)

This powder lichen has a cream thallus loose at the surface without tints of blue-grey and an obvious but never lobed or raised edge. Spot tests Ką dirty orange, Cą dirty orange, Pd+ yellow-dirty orange. On siliceous or calcareous rocks often in sheltered situations. L. eburnea occurs in similar situations, is always greener or blue-grey and is cleanly K+ yellow, C+ faint yellow or pink. In Ireland, there are a few scatter sites in the north.

Key characteristics

  • Cream-coloured thallus, loosely structured, delimited, but edge not lobed or raised
  • Spot tests: all with rather dirty reactions none bright or clear; shaded calcareous or siliceous rock.

Original text submitted by Vince J. Giavarini

 Simms, M. J., (2016). Lepraria diffusa diffusa (J.R. Laundon) Kukwa. [In] LichenIreland. Accessed on 2020-08-05.