The two main species of cannabis are Cannabis sativa and Cannabis indica. These two kinds of marijuana look slightly different when the plant is grown. Indicas generally grow shorter and are bushier with broad leaves while sativa plants are taller with thinner, longer leaves. Interestingly, true sativas and indicas are supposed to greatly in their effects. The effects of indica strains tend to be more calming, relaxing, and soothing to the body. Alternatively, sativa strains usually cause a mind-racing, cerebral high involving less drowsiness.