Irish lichens

Lecania rabenhorstii

Order: Lecanorales       Family: Incertae sedis

Species: Lecania rabenhorstii

Growth type crustose
Photos: Coastal wall. Ballyrisode, Co. Cork, SW Ireland.
Identified by John Douglass

Thallus forms thick areolate, yellowish-grey, non-pruinose +/- eroded patches. Apothecia to 0.7mm with pruinose orange-brown discs, the yellow-white margins sometimes excluded. The spores are 1-septate, 11-13(-16) x 4-7 Ám. Microscope photograph below.
Chemical reactions negative.

Mainly coastal on base-rich rocks, limestone etc

Similar: L. turicensis. Thallus whitish-grey with crowded apothecia

Lecania rabenhorstii

Lecania rabenhorstii

Microscope photograph
Lecania rabenhorstii
Lecania rabenhorstii January 2012

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