Irish lichens

Pertusaria leioplaca

Order: Pertusariales       Family: Pertusariaceae

Pertusaria leioplaca

Growth type crustose.
Photos: Macroom, Co. Cork and Killarney, Co. Kerry, SW Ireland.
Specimen left and immediately below confirmed by Brian Coppins

Thin grey-white to pale greenish-grey thallus containing clusters of coarse crystals. Margin +/- unzoned. Scattered flat-topped warts with spreading, +/- elliptical bases. Apothecia usually single with small pore-like discs. Pycnidia are rare. Asci (3-) 4 (-6) spored, the spores (40-)50-80(-120) x (20-)25-40(-50) Ám.
Microscope photographs below.
K+ yellow, C-, KC+ yellow, P+/- orange-red, UV+/- pale orange

Occurs throughout Ireland on sheltered, shaded, smooth-barked deciduous trees and shrubs.

Similar: Pertusaria pertusa, 2-spored asci


Pertusaria leioplaca


Pertusaria leioplaca


Pertusaria leioplaca

Microscope photographs
Pertusaria leioplaca, ascus


Pertusaria leioplaca, ascospore
Pertusaria leioplaca November 2009, February 2010 ans April 2012

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