Cannabis possible split from its closest relative, Humulus (hops), through the mid Oligocene, close to 27.8 million several years in the past Based on molecular clock estimates. The centre of origin of Cannabis is probably going in the northeastern Tibetan Plateau. The pollen of Humulus and Cannabis are really equivalent https://reidhptxa.wikistatement.com/4163127/cannabis_no_further_a_mystery