Observation 81583: Suillus Gray
When: 2011-10-23
No herbarium specimen

Notes: This Suillus sp. was also collected by an unidentified participant at the NJMA foray in the Pine Barrens. Though the bottom portion of the stipe is missing, some annulus remnants are still visible on the remaining upper half. Note the peculiar staining reactions with NH4OH and KOH.


Staining of the pileipellis with 3% KOH (aq)
Application of 3% KOH (aq) to the context results in a red-purple flash that immediately resolves to this violet-blue stain
Application of aqueous ammonia also stains the flesh red-purple that changes to violet blue in 1-2 sec. Ammonia vapors stain the context reddish, though the color persists. Unlike KOH, ammonia also reacts with the tube layer and pore surface — interestingly, roughly the same color is obtain...
Staining of the pore surface with aqueous ammonia

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Created: 2011-11-06 17:30:23 PST (-0800)
Last modified: 2012-08-03 17:34:26 PDT (-0700)
Viewed: 25 times, last viewed: 2016-10-23 22:31:43 PDT (-0700)
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