Editing Medical cannabis (section)

=== Landrace strains ===
[[File:The Three Cultivars of the Cannabis Plant.png|thumb|Evolution of cultivated cannabis strains. The [[cultivar]], ''Cannabis ruderalis'', still grows wild today.]]

Cannabis seeds may have been used for food, rituals or religious practices in ancient Europe and China.<ref name = "Holland_2018">{{cite book|editor=Holland, Julie|title=The Pot Book: A Complete Guide to Cannabis|date=2010|publisher=Simon and Schuster|location=New York|isbn=978-1-59477-898-8|access-date=22 April 2018|url=https://books.google.com/books?id=tV0oDwAAQBAJ|archive-date=13 January 2023|archive-url=https://web.archive.org/web/20230113004529/https://books.google.com/books?id=tV0oDwAAQBAJ|url-status=live}}</ref>{{rp|19–22}} Harvesting the plant led to the spread of cannabis throughout [[Eurasia]] about 10,000 to 5,000 years ago, with further distribution to the [[Middle East]] and Africa about 2,000 to 500 years ago.<ref name = "Holland_2018" />{{rp|18–19}} A [[landrace]] [[strain (biology)|strain]] of cannabis developed over centuries.<ref>{{cite book|last1=Evert|first1=Ray F.|last2=Eichhorn|first2=Susan E. |title=Raven Biology of Plants|date=2013|publisher=W. H. Freeman and Company|location=New York|isbn=978-1-4292-1961-7|pages=213–17|edition=8th}}</ref> They are cultivars of the plant that originated in one specific region.

Widely cultivated strains of cannabis, such as "Afghani" or "Hindu Kush", are indigenous to the [[Pakistan]] and [[Afghanistan]] regions, while "Durban Poison" is native to Africa.<ref name = "Holland_2018" />{{rp|45–48}} There are approximately 16 landrace strains of cannabis identified from Pakistan, Jamaica, Africa, Mexico, Central America and Asia.<ref>{{cite book|last1=Evert|first1=Ray F.|last2=Eichhorn|first2=Susan E. |title=Raven Biology of Plants|date=2013|publisher=W.H. Freeman and Company|location=New York|isbn=978-1-4292-1961-7|pages=501–04|edition=8th}}</ref>