Ed Rosenthal is probably right about the Mexican Sativa heritage. I've smoked alot of Mexican dirt-weed living near the border for 40 years and that's exactly what Sour D. reminds me of. With all the deliciously refined strains there are to chose from, why growers chose this one is beyond me. Bad aroma and even worse flavor: earthy, tobacco, like dirty. Yeah, it fucks you up, but not in any interesting sort of way. Very nervous and uninspiring buzz.