At midnight October 17, 2018, the Cannabis Act went into effect in Canada, legalising the use and possession of marijuana across the country. 
With the passing of the act, a new area of stamp collecting opened up with the new cannabis tax stamps.

Samples of each province/territories stamp. 

Be sure to look at the Jurisdiction of each stamp. Every province will have their initials on the stamps, so that means you need to source stamps from all provinces and territories.