Observation 32472: Boletus nobilis Peck

When: 1995-08-15

Collection location: Thompson Park, East Liverpool, Ohio, USA [Click for map]

Who: walt sturgeon (Mycowalt)

No specimen available

Under oak and beech.



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Thanks Walt.
By: Dave in NE PA
2010-01-27 23:31:20 EST (-0500)

Haven’t yet found any variipes since acquiring KOH at the 2008 NEMF foray. B/R/B gives fairly similar KOH reactions on the caps of variipes and nobilis. I conclude that the purplish black zone one sees with variipes is an important determining factor. My collections IDed as variipes typically show reticulations on most or all of each stalk.

Boletus variipes
By: walt sturgeon (Mycowalt)
2010-01-27 19:54:23 EST (-0500)

usually has much more prominent reticulations on the stipe. There are also differences with the macro chemical reactions. B. variipes turns dark amber with a puplish black zone on the pileus with KOH and ammonia. But these two are very close as is Boletus atkinsonianus.

How does one most easily
By: Dave in NE PA
2010-01-24 21:29:30 EST (-0500)

distinguish nobilis from variipes? Is it the chemical tests, or maybe the degree to which the stalks are reticulate? These look an awful lot like what I’d generally call variipes.

Created: 2010-01-24 14:20:38 EST (-0500)
Last modified: 2010-01-24 14:20:38 EST (-0500)
Viewed: 155 times, last viewed: 2018-07-24 22:37:30 EDT (-0400)
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