MPHO RANTAO AMERICAN rapper and businessman JAY-Z has officially joined the cannabis business in the United States with the launch of his new cannabis line. The hip-hop Grammy winner announced that his first cannabis line, Monogram, would be a partnership with California-based company Caliva, which the rapper joined forces with as Chief Brand Strategist in July 2019.  Monogram, according to a press release and website, is a company that prides itself on its “careful strain selection, meticulous cultivation practices and uncompromising quality, while seeking to redefine what cannabis means to consumers today”.   The brand unveiled its social media channels and…