Observation 179053: Arthonia Ach.

Notes:
on trunk of Ilex opaca

~50 year old mixed hardwood forest

thin scurfy whitish stain with yellowish-green scurfy chlorococcoid algae mixed in and encrusting surface, apothecia small irregular dark superficial, epihymenium brownish, hymenium clear I+ golden-brown, asci balloons with evenly thick walls I+ red-brown, spores not found

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