Observation 31346: Tricholoma aurantium (Schaeff.) Ricken

When: 2009-12-31

Collection location: Salt Point State Park, Sonoma Co., California, USA [Click for map]

Who: Ron Pastorino (Ronpast)

Specimen available

These seem to match up fairly well with the descriptions. The caps were somewhat viscid and the gill edges were rusty, especially the older ones. The gills were close and slightly notched. The caps were up to 8.2 cm across.
The white spores were not amyloid, smooth and measured ~ 4.6-6.0 X 3.0-3.8 microns.
The upper portion of the stems were covered with small rusty scales or squamules.
The stem however, was stuffed to hollow and somewhat rooting, which could make them more like Tricholoma aurantio-olivaceum.
They were growing in a Tanoak dominant area although scattered Madrone and fir were present.

Proposed Names

57% (1)
Eye3 Eyes3
Used references: Mushrooms Demystified by D. Arora and The Agaricales of California Trichloma by K. Shanks
55% (1)
Recognized by sight: does look a little like old aurantio-olivaceum but the cap is wrong… doesn’t fit well with the western aurantium, really different from the eastern one.

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Eye3 = Observer’s choice
Eyes3 = Current consensus


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Created: 2010-01-02 13:48:59 CST (-0500)
Last modified: 2010-01-02 13:48:59 CST (-0500)
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