On hardwood (oak); black spore deposits, stains hands, spore dark color, ellipsoid, ca 6 × 12 uM. Some asci with immature (small, hyaline) spores. Ascus tips blue in Melzers (tiny area).


Ascocarps. Left: bottom side. Others top side showing hymenium.
Abundant on hardwood log.
Asci in Melzers.
40x (2.5 uM/division)
Asci in Melzers.
40x (2.5 uM/division)
Basidiospores from spore deposit (mature).
40x (2.5 uM/division)
Blue ascus tip in Melzer’s reagent. 100x oil.
(1.0 uM/division)
Black spore deposit

Proposed Names

80% (1)
Used references: MW Beug, AE Bessette, AR Bessette (2014) Ascomycete Fungi of North America
Based on microscopic features: Spore size, shape. Amyloid ascus tips.

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= Observer’s choice
= Current consensus


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