Observation 218639: Pleurotus ostreatus group
When: 2015-10-09
39.7407° -123.6317° 711m
No herbarium specimen
0 Sequences

Habitat notes: Growing on top of felled hardwood stump within a mixed coniferous-broadleaf (Black Oak, Doug.-Fir, Bay Laurel, Madrone) forest

Key characters used to ID: The “classic” pleurotoid form. Decurrent gills down truncate eccentric stem. Monomitic consistency. Microscopic characters: “Spores 7.5–9 (–11) × 3–4.5 μm, ellipsoid, smooth, hyaline, inamyloid, white to pale pinkish white in deposit” (Desjardin and Wood, 2015).


Pleurotus “oyster mushroom”
Pleurotus “oyster mushroom”
Pleurotus “oyster mushroom” spore print
Pleurotus spores in Melzer’s reagent [40× objective lens × 10× optical lens = 400× total magnification]

Proposed Names

80% (1)
Eye3 Eyes3
Recognized by sight: Brian Bowers
Used references: Tom Bruns

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Eye3 = Observer’s choice
Eyes3 = Current consensus


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Created: 2015-10-12 15:34:43 CDT (-0500)
Last modified: 2015-10-14 00:35:11 CDT (-0500)
Viewed: 48 times, last viewed: 2017-06-20 23:12:36 CDT (-0500)
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