Name: Xanthoconium separans
Authority: (Peck) Halling & Both 1998
Vouchered by: Brad Bomanz
Date found: 7/18/2004
Collected by: Brad Bomanz
Voucher ID: 20
Confirming Mycologist: Dr. Andrew Methven
Latitude: 038.526 N
Longitude: 090.561 W
City: Eureka
County: St. Louis
State: Missouri
Site location: Tyson Research Center
Habitat: woods - oak - hickory upland
Moisture conditions: very moist
Substrate: soil - rich loamy
Reference document: North American Boletes - 2000
Author:Alan E. Bessette, William C. Roody, Arleen R. Bessette
ISBN No: 0-8156-0588-9
Page no:279
Spore length: 12 - 13.5 microns
Spore width: 4 - 4.5 microns
Spore color: pale brown
Spore texture: smooth
Spore shape: subfusiform - spindle-shaped
Spore print color: reddish brown
Chemical reaction: The stipe turned blue green with the addition of KOH and the cap turned brick red to blood red with the addition of ammonium hydroxide. The #05 photos of this voucher in the "Voucher Photo" folder illustrates the instantanious reactions.
This Genus is also classified as Boletus separans because both mushrooms have the same macrochemical reactions. When young the pores are white becoming yellow as the voucher shows. When old, the pores are ochre brown. The pores are circular and unchanging when bruised. Close examination by Dr. Methven (see annotation above) combined with the 2015 DNA analysis confirmed that this specimen is Xanthoconium separans aka Boletus separans.

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