Observation 178989: Opegrapha varia Pers. (Site ID) (Alyxoria varia)

on sheltered side at base of big old leaning Quercus montana

old open oak-maple forest on west-sloping side-ridge

crust thin white continuous, algae trentepohlia, apothecia lirellate unbranched 2-3 times longer than wide wiggly ~sessile, exciple fully carbonized, disk open strongly yellow-green pruinose UV+o 350nm, epihymenium dark orange POL+ faint clearing in K but not changing color, hymenium clear, asci broadly clavate with thickened tips, spores 8 per ascus 5-septate walls evenly thickened interior yellowish/greenish in water but clearing in K and becoming thinner-walled ~25×10um


at 40x, stacked
apothecia section, at 400x
spores, in water, at 400x
spores in ascus, in K, at 400x

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