Unless you are a breeder you will likely never grow Cannabis Ruderalis.
Ruderalis is a cousin of Sativa and Indica. The straight and narrow cousin that never gets high.
Originating from Russia and Central Asia, Ruderalis grows wild in the country. Due to the fact that it has a very low THC level, it has not been used by potheads until 1924. A Russian botanist discovered that if you cross pollinate Ruderalis with Sativa or Indica plants, you get a high THC auto-flowering plant.
The physical appearance of Ruderalis is different from other cannabis plants as it has leaves with 3 large finger leaves and not the usual 5, 7, or 9 finger leaves.