Ruderalis....originally from Russia, this type of cannabis grows into huge christmas trees fast. unfortunately, THC and CBD levels are so low, that it never made it to the smoking circuit. however, ruderalis is making somewhat of a comeback, as growers are starting to cross indica and sativa strains with ruderalis for its growth size.
from what I've learned, it's actually the opposite... ruderalis is a VERY short, stout plant that autoflowers... good for stealth growing... they made the strain Lowryder out of it (don't know what they crossed it with) which actually produces some decent buds...