Irish lichens
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Order: Lecanorales
Family: Physciaceae
Species: Physcia aipolia Photos: On deciduous twigs. Ballingeary, Cork, SW Ireland. Whitish or pale bluish-grey thallus to 6cm diameter. Very distinct pale pseudocyphellae on lobes. Dark rhizines on under-surface. Abundant dark-brown or black, +/- pruinose apothecia. Asci are 8-spored, spores 1-septate, brown, thick-walled. 18-24 x 7-10 µm. Microscope photographs below. Occurs on well-lit, nutrient-rich trees, often in the nodes of twigs and branches. Cortex and medulla: K+ yellow Occasionally host to the lichenicolous Nectriopsis physciicola Physcia stellaris has lobes without pseudocyphellae, medulla K- |
