Irish lichens

Caloplaca ferruginea
Order: Teloschistales       Family: Teloschistaceae

Species: Blastenia ferruginea (Caloplaca ferruginea)

Growth type crustose.
Photos: On hazel and willow. The Burren and Gougane Barra, Ireland

Entire or immersed thin, smooth, pale whitish-grey thallus. Large bright-orange apothecia, often with uneven, flexose margins. Asci are 8-spored, spores ellipsoid, polarilocular, 12-14 x 6-8 Ám, septum 5 Ám to approx 1/2 length of ascospore. Micrograph below.
K+ crimson / purple.

Mainly found on Hazel and Willow, also on twigs and trunks of other basic-barked trees. Increasing in Ireland, rare in UK

Similar: C. crenularia. Found on siliceous rocks.

Caloplaca ferruginea

Caloplaca ferruginea

Caloplaca ferruginea, microscope photo
Caloplaca ferruginea. April and September 2009

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