The website for strains and clone-only cannabis plants and their origins can be found at 'rollitup.org'. Almost all of it. Everybody into cannabis growing should visit this site. It's insane how much weed comes from two original strains: The Purps from Mendocino, CA- which originally rolled out of there only two-feet tall or so in 1985-ish; and Chemdawg IV; and the other three Chemdawg's. I have IV, and it was supposedly the best and last one sprouted. My own two strains I mix and play with a lot are both from a grower on the island of Kiloa, HI and sold in the SF Bay Area in MMJ in 2009/2010. Then gone. Not sold anywhere, but merely digging through the Purps for seeds I made in different generations makes the fingers black with enough material to smoke. Same with a Querkle/9LB. Querkle, Grape Inferno, Deep Purple, Cheese Quake, Purple DeathStar, Urkle, GDP. and a 100+ other's are descendants of The Purps. Diesel's and Sour's and OG's are almost all found going back to a Chemdawg strain. Just weird. Interesting. But that is why I grow them in pure form-to mix them. I mixed them together and it's grown every year by one friend into a huge purple beast. He makes IBL seeds every year too. Purps X Chemdawg IV. I made a load too. I can't stop growing and sprouting. Clone-only SFV OG Kush x Chemdawg IV is killer. I take clone-only strains and cross them by seed-strains. The clone-only strains are the strongest plant of the batch of course so they make great seeds.