• Thelidium pluvium Orange
Thelidium pluvium
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(Map updated: 11 August 2009)

This species forms dots on rock in shallow streams in the uplands (south-west Ireland). The grey-green to brown thallus is minutely bubble-wrap blistered with discs (perithecia) each of which, except for the apex, is wrapped in a thin involucrellum and a layer of thallus. Spores are one-septate and within the medium range (2430 x 1014m).

Key characteristics

  • Thallus grey-green to brown; perithecia surrounded by an involucrellum and layer of thallus
  • Spores one-septate >20m long; wet shallow rocks, moorland streams.

Original text submitted by Vince J. Giavarini

 Simms, M. J., (2016). Thelidium pluvium Orange. [In] LichenIreland. Accessed on 2018-12-18.