• Strigula jamesii (Swinscow) R.C.Harris
Strigula jamesii
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The discs (perithecia) of this crustose epiphytic lichen are reminiscent of Porina. In this species of Strigula the spores (<18m long) are three-septate and constricted at the septa with the two upper cells slightly larger than the lower while the perithecia are strengthened by an involucrellum. In Ireland, it has been recorded from County Fermanagh.

Key characteristics

  • Thallus greyish, thin, perithecia half-sunken, involucrellum present
  • Spores three-septate; on the bark of old trees in woodland, sometimes spreading to the roots.

Original text submitted by Vince J. Giavarini

 Simms, M. J., (2016). Strigula jamesii (Swinscow) R.C.Harris. [In] LichenIreland. Accessed on 2018-08-20.