LowRyder and its hybrids are true autoflowers.
MightyMite has a semi-autoflowering trait, in that it will initiate flower (I have not seen this myself but am looking for seeds atm) under slightly longer days than the 'standard' cannabis strains will.

Autoflower basically means that a cannabis plant will flower based on genetic age, not day length. This also means you cannot clone an autoflowering plant.
stinkyattic Reviewed by stinkyattic on . auto flowering? can anyone give me an in-depth definition? Rating: 5