When did the genus Cannabis split from its closest relative Humulus?
The genus Cannabis likely split from its closest relative, Humulus, during the mid Oligocene around 27.8 million years ago according to molecular clock estimates.
Questions about Cannabis
Short answers, pulled from the story.
Where is the centre of origin for the genus Cannabis located?
The centre of origin of Cannabis is likely in the northeastern Tibetan Plateau with the oldest pollen found in Ningxia China dating to the early Miocene around 19.6 million years ago.
How many species of Cannabis are recognized by taxonomists today?
Taxonomists have debated the number of species for well over two centuries but Ernest Small and Arthur Cronquist published a revision in 1976 that recognizes a single species of Cannabis with two subspecies.
Which cannabinoids are produced in greatest abundance by Cannabis plants?
The two cannabinoids usually produced in greatest abundance are cannabidiol CBD and/or Δ9-tetrahydrocannabinol THC but only THC is psychoactive.
What was discovered at the Yanghai Tombs regarding cannabis history?
An international team demonstrated that material found near the head and foot of a shaman in the Yanghai Tombs contained THC which represents the oldest documentation of cannabis as a pharmacologically active agent.