Observation 65510: Phanerochaete P. Karst.

This is probably the same Phanerochaete picked up last year just above the valley, and it may be the same one that is common at Pt. Reyes that I originally confused with Piloderma. This particular specimen is the largest I’ve seen.

When I went to key it out in the Cortiaceae s.l. I was stopped at the first couplet because it says that Phanerochaete species do not stain with KOH (once the red-staining Rhizochaete are eliminated. But Karen Nakasone wrote back: “Did you consider Phanerochaete sanguinea? It has yellow cords that turn green in KOH.
Phanerochaete carnosa’s hymenium turns greenish black in KOH but it doesn’t develop cords.” And after pushing past the first couplet this specimen does key to P. sanguinea, but the solid green staining, really yellow-orange color vs. reddish, and the slightly smaller spores (5 X 2.5) make me think is something a little different from sanquinea. It also seems close to P. chrysosporium, but the color of that sounds paler, and the cystidia seem a bit larger.

Species Lists


closeup of basidiocarp
close up of basidiocarp
close up of cystidium
hymenium with large, smooth, cystidium
incrusted simple-septate hyphae
closeup showing rhizomorphs
The green to the upper right is the reaction to 3% KOH

Proposed Names

83% (1)
Eye3 Eyes3
Recognized by sight: macroscopically the big rhizopomorphs and bright color made the genus likely.
Used references: my main reference was Karen Nakasone, who I emailed the photos and the description to, but I also used the Cortiaceae s.l.
Based on microscopic features: Lack of clamps, big cystidia, spore size, shape
Based on chemical features: This stains green almost immediately with KOH -more about this below
28% (1)
Recognized by sight: Phanerochaete chrysosporium is now in Phanerodontia, so that genus seems possible for this observation.

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Eye3 = Observer’s choice
Eyes3 = Current consensus


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Created: 2011-04-14 16:20:17 CDT (-0400)
Last modified: 2017-12-12 16:31:33 CST (-0500)
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