From the Document: "Botanically, hemp and marijuana are from the same species of plant, 'Cannabis sativa', but from different varieties or cultivars. However, hemp and marijuana are genetically distinct forms of cannabis that are distinguished by their use and chemical composition as well as by differing cultivation practices in their production. While marijuana generally refers to the cultivated plant used as a psychotropic drug (whether used for medicinal or recreational purposes), hemp is cultivated for use in the production of a wide range of products, including foods and beverages, personal care products, nutritional supplements, fabrics and textiles, paper, construction materials, and other manufactured and industrial goods. 'Hemp and marijuana' also have separate statutory definitions in U.S. law."
CRS Report for Congress, R44742
Congressional Research Service: https://crsreports.congress.gov/