Observation 82423: Agaricus xanthodermus Genev.
When: 2011-10-13
Who: Byrain
No herbarium specimen

Notes: Growing in a grassy field along the side of a bike path. Smells strongly like chemicals even when dried, stains yellow like a highlighter, and KOH leaves intense and persistent yellow stains wherever it is applied.
From 30 spores measured the range is 5.5 – 6.5 × 4 – 5 (5.5) μ, the average size is 6 × 4.31 μ, and the average Q is 1.4.


Intense yellow stains on the cap, stem, and context are KOH.
Spores from annulus
Mounted in KOH
1μ divisions
Mounted in KOH
2.44 μ divisions

Proposed Names

92% (2)
Eye3 Eyes3
Recognized by sight: Stains yellow like a highlighter.
Based on microscopic features: Spore size
Based on chemical features: Chemical scent, KOH stains yellow strongly.

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Eye3 = Observer’s choice
Eyes3 = Current consensus


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Created: 2011-11-14 00:20:52 CET (+0100)
Last modified: 2011-11-14 07:16:01 CET (+0100)
Viewed: 70 times, last viewed: 2017-06-26 23:19:37 CEST (+0200)
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