Observation 65934: Xylodon quercinus (Pers.) Gray

When: 2011-04-18

Collection location: North side of Yosemite Valley west of Yosemite Falls, Yosemite National Park, California, USA [Click for map]

37.7167° 119.7289°

Who: Tom Bruns (pogon)

Specimen available

The specimen was on an oak log, which fits nicely with the species that I keyed it to. However, my species ID is a little uncertain. The spores sizes that I measured 6.2-7 X 2.8-3.3 are a little long for X. crustosus and a little short for X. quercinus, and I’m not sure if I see the capitate cystidioles (at least as picture in Bernicchia et al.). Eventually there should be some sequence to go with support or refute this.

Species Lists


note the Stereum hirsutum in the background. That’s why I’m sure this is oak.
1000X spores in KOH/congo red
intact hymenium in phloxine
squashed hymenium in phloxine. The fact that it squishes this well, helps eliminate Mycoacia (Phlebia) What the weird cystial-like cells are is not clear to me.

Proposed Names

55% (1)
Eye3 Eyes3
Used references: Corticiaceae s.l. byt Bernicchia et al.
Based on microscopic features: presence of hyphal-like cystidia, spore size and shape, presence of clamps

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Eye3 = Observer’s choice
Eyes3 = Current consensus


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Created: 2011-04-22 15:26:44 PDT (-0700)
Last modified: 2011-04-22 15:26:45 PDT (-0700)
Viewed: 162 times, last viewed: 2018-02-25 20:55:07 PST (-0800)
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