Observation 178948: Arthonia Ach.
When: 2013-09-28
(35.6545° -83.0595° 1150m)

Notes: on bark of Castanea dentata at chest height (12 cm DBH)

open oak-hickory forest on ridge

thin smooth continuous Coccocarpia-gray thallus, photobiont trentepohlia?, apothecia discose with orange pruina and thin scant gray rims, epihymenium opaque but essentially POL- also K-, hymenium reddish-brownish POL- K- K/I-, exciple and/or hypothecium dark brown POL- K-, paraphyses branched ~gnarled, asci broadly clavate with thick K/I- tip, spores 8 per ascus turning brown 1-septate top cell wider bottom cell longer slightly constricted smooth ~15-16×7-8um

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Created: 2014-09-16 00:29:39 PDT (-0700)
Last modified: 2014-09-16 00:29:40 PDT (-0700)
Viewed: once, last viewed: 2016-10-21 07:08:55 PDT (-0700)
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