Observation 18471: Boletus bicolor Peck

When: 2008-07-15

Collection location: Luzerne Co., Pennsylvania, USA [Click for map]

Who: Dave in NE PA

Specimen available

I’ve collected B. bicolor for many years now. I get them in lots of different spots around here (mix of oak and White Pine). Several different collections I made last summer, in the usual spots, showed an unusually strong bluing reaction on the stalks; as far as I can recall, much more prominent that I’ve seen in previous collections. Somew of them also showed more than the usual amount of bluing on the pores. These boletes (from two or three different collections) agree very well with the descriptions given for B. bicolor throughout the literature. Bessette/Roody/Bessette lists two varieties for which there is some slow bluing on the stalks. These changed within a few minutes. I am well aware of the fast bluing bicolor look alikes… such as B. sensibilis, B. pseudosensibilis, B. miniato olivaceus, B. speciosus…, and I seriously doubt the ones seen here fall into any of these categories. One collection of the strong staining bicolor showed the reticulations on the upper stalk.


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59% (2)
Recognized by sight: Collected at sites where B. bicolor has been observed during many different years.

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Created: 2009-02-15 19:04:44 -02 (-0200)
Last modified: 2016-02-10 00:56:53 -03 (-0300)
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