Observation 47817: Baorangia bicolor group

When: 2010-06-29

Collection location: Walking Iron Park, Dane Co., Wisconsin, USA [Click for map]

Who: Steve Nelsen (sfnelsen)

No specimen available

Photographed 6/25/2010. Section Subtomentosus, Subsection Fraterni in Smith’s classification. biggest, cap 5.7 cm, dull dark red, flesh yellow, total H 8 cm, stem 13 mm wide at top pores 2 mm deep bruise blueish gray FeCl3 on cap and flesh darkens but is not really greenish spores light brown in mass, long and skinny, ~10×3 microns. The color of the littlest one is much oranger than the larger ones, but I am not sure that they are not the same species. They were found right next to each other, and the stems of both discolor in a similar fashion when they are touched.

[admin – Sat Aug 14 02:07:27 +0000 2010]: Changed location name from ‘Walking Iron Park, Dane Co. WI, USA’ to ‘Walking Iron Park, Dane Co., Wisconsin, USA

Proposed Names

41% (4)
Used references: Smith, A. H.; Thiers, H. D. Boletes of Michigan, Univ. Michigan: Ann Arbor, 1971
-11% (3)
Recognized by sight
30% (4)
Recognized by sight
55% (1)
Recognized by sight

Please login to propose your own names and vote on existing names.

Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
Bicolor cluster
By: Bill (boletebill)
2010-07-02 17:53:24 PDT (-0700)

I’d agree with Walt and Noah that B.bicolor is a species complex and hidden in there a several crytic species look-alikes but also that whatever the “true” B. bicolor is it is in addition polymorphic (or if you like variable in phenotype). Boletus bicolor is by far the most common bolete in CT and yet still it perplexes. One thing I have noticed is that when B. bicolor is young and has a heavy moisture content the cap and stipe DOES blue with handling. If these specimens are allowed to continue to develop through several days with no new rain this affect disappears and they “behave” as if yhey were proper Boletus bicolor, i.e. they do not blue on the cap and stipe! Try it! This is a mushroom that changes dramatically in appearence and behavoir between birth and death

By: Noah Siegel (Noah)
2010-07-01 18:43:26 PDT (-0700)

that’s true Walt…
most of the “bicolor” obs on MO are not what I’m conferable calling B. bicolor

The bluing on the stipe and pileus
By: walt sturgeon (Mycowalt)
2010-07-01 18:06:49 PDT (-0700)

raises questions about this being bicolor.

I agree Noah
By: walt sturgeon (Mycowalt)
2010-07-01 18:04:34 PDT (-0700)

A big complex in E. North America

A pretty good fit
By: Noah Siegel (Noah)
2010-06-29 18:15:21 PDT (-0700)

for B. bicolor; but the more of these red capped-yellow pored boletes going by the name “bicolor” that I see the more I’m convinced that it’s a large species complex…

Created: 2010-06-29 12:37:10 PDT (-0700)
Last modified: 2016-04-23 10:57:27 PDT (-0700)
Viewed: 94 times, last viewed: 2017-06-07 18:07:04 PDT (-0700)
Show Log