well, i am soooo suprised with you people. every one knows that sativas are the tall ones. mex. sativa, jam. sativa, afgan indica, white wid. indica. look at a map and see, sativas grow in tropical enviroments where loose buds can thrive. indica grows in higher elevations and colder enviroments making them smaller. trust me i have done research. please go look for your self. if you are still not shure i can give you some links.