• Caloplaca oasis (A. Massal.) Szatala

There are no records for this species at present.

Most past records of C. polycarpa in Ireland belong here owing to the mistakenly held belief that C. polycarpa was a parasite of Verrucaria spp., especially V. baldensis. C. oasis is the correct name for the Verrucaria parasite but it can also grow independently on calcareous man-made substrates such as concrete and mortar. Well-developed forms are also those which are parasitic. In Ireland, the species is widely distributed; it is not uncommon.

Key characteristics

  • Often parasitic on V. baldensis on limestone buildings and churchyard monuments
  • A member of the C. holocarpa group; discs small 0.20.4mm diam.

Original text submitted by Vince J. Giavarini

 Simms, M. J., (2016). Caloplaca oasis (A. Massal.) Szatala. [In] LichenIreland. Accessed on 2020-05-30.