VOUCHER INFORMATION
Name: Agaricus placomyces
Authority: Peck 1878
Vouchered by: Brad Bomanz
Date found: 11/6/2004
Synonyms:
Collected by: Brad Bomanz
Voucher ID:17
Confirming Mycologist: Dr. Andrew Methven
LOCATION
Latitude: 038.547 N
Longitude: 090.402 W
City: Sunset Hills
County: St. Louis
State: Missouri
Site location: n/a
ENVIRONMENT
Habitat: open area
Moisture conditions: very moist
Substrate: wood - mulch
IDENTIFYING DOCUMENT
Reference document: The Audubon Society Field Guide to North American Mushrooms - 1981
Author:Alfred A. Knopf
ISBN No: 0-394-51992-2
Page no:507
SPORE DESCRIPTION
Spore length: 6 - 7 microns
Spore width: 3.5 - 4 microns
Spore color: brown
Spore texture: smooth
Spore shape: elliptical - some with an apiculus at one end
Spore print color: dark brown to almost black
Chemical reaction: n/d
The field guide listed was just the beginning of the process. Dr. Andrew Methven and Jay Justice were the ones responsible for the classification that was based on the photos reference on the Voucher Information. Close examination by Dr. Methven (see annotation above) combined with the 2015 DNA analysis confirmed that this specimen is Agaricus placomyces.