CBD, an abbreviation for cannabidiol, is the second most-prevalent cannabinoid found in the cannabis plant. It is expressed in the hemp flower, the bloom of the cannabis plants, specifically in the sticky trichomes that coat the buds. Cannabigerol, or CBG, is the third most-prevalent cannabinoid found in the cannabis plant. In its earliest form within the plant, it is the parent molecule of both CBG and THC. Considered to be the major cannabinoids, CBD and THC have been more extensively studied than CBG.