Observation 104045: Boletus L.
When: 2012-08-05
No herbarium specimen

Notes: A single specimen growing under mature oaks. It’s a small fruitbody, less than 2.5" in height. First I thought it was a bleached out B. auripes, though it grew far away from the area where I found auripes clusters. Further tests revealed that it’s a different mushroom. Notice the unique and strong reaction to both KOH and ammonia on the context. The colors of the fruitbody and the macrochemical test point toward Retiboletus ornatipes, but the reticulation (though darkening upon handling) is not coarse enough.

Images

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No staining of the contex
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Next to a comparably sized B. auripes, which has orange tubes
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Staining with ammonia (left half) and 3% KOH (right half); picture taken immediately after application of the reagents
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Intensification of the staining reaction over time — picture taken 5 min following application of the reagents (ammonia is on the left)

Proposed Names

28% (1)
Eye3 Eyes3
Recognized by sight: Overall appearance merits placement in genus Boletus

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Eye3 = Observer’s choice
Eyes3 = Current consensus

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Created: 2012-08-06 10:39:24 PDT (-0700)
Last modified: 2012-08-06 10:51:57 PDT (-0700)
Viewed: 17 times, last viewed: 2015-07-17 23:04:38 PDT (-0700)
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