found this interesting article, although they say that the strains have now been hybridised, i still believe there to be pure sativas and pure indica strains left un discouvered or locked in the seed vaults of some seed banks.
After hundreds of years of breeding and blending these plants for potency, aroma, flavor, and cerebral effects, one question remains: Are there any more true Sativas or Indicas out there today?
www.leafbuyer.com
i hope this is not too far off the plot of the op's question to be a nusence to his thread, please feel free to remove it if it is