• Caloplaca atroflava (Turner) Mong.
Caloplaca atroflava
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This species closely resembles C. holocarpa (described elsewhere) but differs in the thallus and prothallus, both of which are black. The spores in C. atroflava are broad (1316 x 910m) with a wide septum (57m). It grows mainly on shingle pebbles. In Ireland, there is a record from County Donegal. Material recorded from County Galway is now considered doubtful.

Key characteristics

  • A shingle lichen similar to C. holocarpa but with a black warted thallus and black prothallus
  • The spores are broad with a very wide septum.

Original text submitted by Vince J. Giavarini

 Simms, M. J., (2016). Caloplaca atroflava (Turner) Mong.. [In] LichenIreland. Accessed on 2018-07-18.