Cannabis is Cannabis. Hemp is old German word such as Haenep.The term Marijuana is made up by Anglo Europeans used to describe Cannabis origins in Mexico. The Cannabinoid profile is the only difference. There are Indica, Sativa and Hybrids and the plant structure is determined by such, just as any other cannabis plant. The scientific difference is that CBG in hemp is converted to CBD more so, where in "Marijuana" CBG is converted into THC more so. Court rulings do not reflect agricultural science and terminology.
hemp Cbd does have thc 0.3 percent thc although not enough to get you mind high you will fail a urinalysis any CBD you buy that says it has 0 thc content is synthetic because you cannot ever take all the thc out of a hemp plant no matter how hard you try or how much you back breed the plant