It is still the same plant. „Marijuana“ is made from both, India and Sativa, or from a hybrid of both. You can even buy hybrids that are made from indica, sativa and ruderalis. Also, in the EU, farmers have to buy their cannabis seed every year. It is not legal to use the seeds produced from the harvest of last year. Because over a few generations the THC content in the „hemp“ rises and to stay under 0.3% new seeds are required.