• Hypocenomyce scalaris (Ach. ex Lilj.) M.Choisy
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Hypocenomyce scalaris
© Mike Simms
Hypocenomyce scalaris
© Mike Simms
Hypocenomyce scalaris
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In the drier parts of Ireland where standing deadwood or old garden sheds are left to decay, this lichen can colonise the lignum surfaces with a multitude of overlapping, shoehorn-shaped squamules. These are grey-brown when dry, the unattached edge angled upwards and dusted with soredia. As colonies develop, black discs emerge covered with an icing of bluish pruina. Thallus is C+ red. Eastern and southern Ireland.

Key characteristics

  • Thallus of grey-brown, overlapping squamules, C+ red; squamule edge sorediate
  • Uncommonly with discs, but these black with a bloom of blue pruina; deadwood, old wooden structures, sandstone gravestones and very acid barked trees.

Original text submitted by Vince J. Giavarini

 Simms, M. J., (2016). Hypocenomyce scalaris (Ach. ex Lilj.) M.Choisy. [In] LichenIreland. Accessed on 2018-08-20.