Interesting. No wonder the males show purple.
Autoflowering is when a cannabis plant flowers based on its calendar AGE rather than light cycle (=photoperiod). A photoperiod sensitive plant, ie. C. indica and C. sativa, flowers when the day length indicates the onset of autumn. An autoflowering plant, C. ruderalis, or Siberian hemp, has evolved to be able to flower under the light of long sub-Arctic summer days. C. ruderalis has no value as a drug, so it has been used in breeding programs specifically to introduce autoflowering into the species that evolved in temperate or tropical regions.