on trunk of smooth-barked Acer rubrum several feet off ground

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

thin shiny green crust, apothecia discose sessile constricted, disk brown to dark red-brown flat epruinose ~shiny, rims conspicuous smooth prominent brown to black, epihymenium red-brown POL- K- or fading to merely brown, hymenium ~70um clear, exciple brownish, hypothecium faint brownish, all POL- K-, asci narrowly cylindrical to clavate conspicuous dark K/I+ tip perhaps with narrow pale cone not penetrating all the way through (biatora- or catinaria-type), spores 8 per ascus hyaline 1-septate but hard to see septae in water in young spores ellipsoid to slightly assymetric thick- but even-walled ~12×6um pretty consistent size


apothecium section, in water K and K/I, at 400x
spores, in water, at 400x
at 40x, stacked

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