When: 2011-05-01

Collection location: Wawona, Yosemite National Park, California, USA [Click for map]

Who: Tom Bruns (pogon)

Specimen available

Fruiting on the underside of wood in a Ponderosa pine, Incense cedar, black oak forest.

This could be a Sistotrema, because some of the basidia could be interpreted as urn-shaped (see last photo), but most seem more cylindrical. It fits B.subcoronatum fairly well, in that it has large basidia for the genus and spores of the right size and shape.

Species Lists


clamps are abundant, also at base of basidium, but not shown here
spores in meltzers
spores in cotton blue
a basidium in which 5 sterigmata are barely visable
here is a basidium that looks vaguely urn-shaped and makes me worry that this is actually a Sistotrema

Proposed Names

55% (1)
Used references: Corticiaceae s.l. Fungi Europeaei
Based on microscopic features: 8-spored basidia 21-23 X 6-7 um; right-angle branched, clamped hyphae; lack of an anamorphic state; oddly shaped (navicular) spores 7.0-7.8 X 2.3 -3.1,

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= Observer’s choice
= Current consensus


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