• Cryptothele rhodosticta (Taylor) Henssen [15]
Cryptothele rhodosticta
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This very rare lichen of moist siliceous rocks surrounding or lining the margins of loughs in the uplands has a tiny, areolate (cracked paving-stone-like), brown-black crustose thallus with just visible, immersed and concave, crater-like discs. The discs are distributed evenly between the areoles (one in each) and contain eight-spores/ascus; spores simple, ellipsoid 1114 x 89m. [This is one of a poorly understood species complex].

Key characteristics

  • Thallus: tiny, crustose, finely cracked, brown-black; discs pore-like with a raised rim, one/areole
  • Spores 8/ascus, simple, ellipsoid 1114um long; moist siliceous rock.

Original text submitted by Vince J. Giavarini

 Simms, M. J., (2016). Cryptothele rhodosticta (Taylor) Henssen [15]. [In] LichenIreland. Accessed on 2018-08-20.