This checklist is a compilation of data from the ongoing NAMA Voucher Collection Project (http://archive.fieldmuseum.org/nama/). The project page states: 'The diversity and distribution of mushrooms and other macrofungi intrigue both amateur mushroom hunters and professional mycologists. For over 40 years the North American Mycological Association (NAMA) has sponsored forays that have recorded species occurrence across this continent.' Click on 'Notes & Vouchers' to see the NAMA collection number (the year is encoded) and foray locality. More information on the NAMA voucher program can be found here: http://namyco.org/about/voucher_prj.html