Observation 26296: Boletus fraternus group

When: 2009-09-21

Collection location: Big Thicket National Preserve, Tyler Co., Texas, USA [Click for map]

Who: Ron Pastorino (Ronpast)

No specimen available

These were a little larger than the standard Boletus campestris or Boletus fraternus. The caps were from 6.0 to 7.6 cm across and the stems up to 8 cm.
The pores stained green-blue rapidly as well as the stem flesh and the cap flesh a little slower. I would say the initial pore color was not bright yellow, more creamy. Also the subfusiform spores seemed larger than that reported for the above species. The were more like 14.2-16.5 X 5.0-6.1 microns.
Maybe it’s true that everything is bigger in Texas!

[admin – Sat Aug 14 01:58:33 +0000 2010]: Changed location name from ‘Big Thicket, Tyler Co. Texas’ to ‘Big Thicket, Tyler Co., Texas, USA’


Proposed Names

76% (2)
Used references: North American Boletes; B-R-B

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Add Comment
Cluster merged?
By: Bill (boletebill)
2009-10-06 15:14:49 EDT (-0400)

I’ve been told that Boletus campestris and B.fraternus have been synonomized with B.fraternus having presidence, thus no more B.campestris. Can anyone confirm this? Nathan?