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Lichen: Solenopsora holophaea

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Solenopsora holophaea showing the squamulose nature of the thallus.

Solenopsora holophaea showing the squamulose nature of the thallus.

Name: Solenopsora holophaea (Mont.) Samp.

Pronunciation: Solenospora holophaea

Conservation Evaluation: Least Concern, Nationally Scarce. Body Type: Crustose

Solenopsora holophaea showing the apothecia.

Solenopsora holophaea showing the apothecia.

Description: The thallus is composed of a jumble of smooth rounded squamules in an irregular mass. The squamules are olive green when wet and red-brown when dry. The apothecia  have a thin well defined rim when young; later this thins as the disc grows out over it. The disc is red-brown to black, often matching the rim colour. The spores are ellipsoid 12 µm by 4 µm.map-solenospora-holophaea

Chemical Tests: C -, K -, KC -, Pd -, UV -.

Nature Notes: This is a maritime species found on rocks and soil on sheltered cliffs. Looks similar to Psora lurida.

Vice County distribution map of Solenospora holophaea: See Map

Link: Map this species on the Lichen Survey

Other species recorded in Ireland

  • Solenopsora candicans (Dicks.) J.Steiner

Text and images © Paul Whelan, 2009.