Are there any scientists out there who could tell me the difference between Sativa, Indica, and Ruderalis? From my understanding, these are actually three different Species of cannabis, with Cannabis Sativa composed of Hemp, C. Indica is what we are all here for, and C. Ruderalis is wild and hardy ditchweed. However, I know that marijuana also has both an Indica and Sativa version. So does that make it Cannabis Indica Sativa and Cannabis Indica Indica? Does this make sense to anyone else??