Not from an official walk, but a pair of significant observations from the city which merit mention on our lists. Both of these Agaricus were collected and studied by Dennis Aita.
sequenced and found to be 100% match to a sequence by Matheny,P.B., et al from Major clades of Agaricales: a multilocus phylogenetic overview, Mycologia 98 (6), 982-995 (2006)
