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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.
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.
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 11:20:38 PST (-0800)
Last modified: 2010-01-24 11:20:38 PST (-0800)
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