TL;DR
The New Brunswick Museum's Citizen Science Project aims to document the shrooms of Atlantic Canada with your help!
Here's what they say they would like you to do to help the mushroom scientists:
1) Take a cool mushroom pic/ Print a Voucher Slip/ Post a pic to the iNat Project w/ Voucher Number
2) Dry you shroom sample at a low temp (60C or less)
3. Enter the info on an Excel Sheet (AC - Collection Information Template)
4. Put your shroom sample in a ziplock and Mail those shrooms in!
(In NB, mail your shrooms to:
Alfredo Justo
New Brunswick Museum - Collections & Research Centre
228 Lancaster Ave.
Saint John, New Brunswick
Canada E2M 2K8)
- All the info and FAQs are HERE
- Get the iNaturalist app to help with mushroom IDs.: ANDROID and IPHONE

Here's what they posted to Insta...
NB Museum on Facebook https://www.facebook.com/nbmmnb/
news story https://www.cbc.ca/lite/story/1.7539334