• Acarospora heppii (Nägeli ex Hepp) Nägeli ex Körb.
Acarospora heppii
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(Map updated: 11 August 2009)

The extremely minute scaly thallus of this yellow-grey or pale reddish-brown lichen develops on some of the most easily overlooked lichen habitats, for example, tiny fragments of undisturbed, rocky waste and old seashells. It has been found growing on piles of rock dumped on the edge of plantation woodlands. The scattered discs (0.2-0.6mm diam.) are very small, developing in the centre of the squamules like little circles. It is extremely local and scattered in northern and central Ireland and is often mistaken for other tiny lichens such as Thelocarpon.

Key characteristics

  • Thallus present as tiny, pale stains on waste fragments of rock
  • Discs, single and rounded; reactions negative.

Original text submitted by Vince J. Giavarini

 Simms, M. J., (2016). Acarospora heppii (Nägeli ex Hepp) Nägeli ex Körb.. [In] LichenIreland. Accessed on 2018-12-18.