Cannabis probable split from its closest relative, Humulus (hops), throughout the mid Oligocene, close to 27.8 million a long time ago according to molecular clock estimates. The centre of origin of Cannabis is probably going during the northeastern Tibetan Plateau. The pollen of Humulus and Cannabis are very similar and https://matth936tye5.blogdomago.com/26294852/considerations-to-know-about-cannabis