Physcia stellaris

Physcia stellaris

Observation - Physcia stellaris. Description: Centre of thallus densely warted. Cortex K+ yellow; medulla unresponsive. A mottling of pseudocyphellae is readily seen, but not as distinct as the white flecks in a sample of P. aipolia I used for comparison.

Centre of thallus densely warted. Cortex K+ yellow; medulla unresponsive. A mottling of pseudocyphellae is readily seen, but not as distinct as the white flecks in a sample of P. aipolia I used for comparison.