User blog comment:Relikz/Chapter 364: Tartarus Arc, Part 1: Immorality and Sinners, Review./@comment-7418318-20131220001936/@comment-173.79.102.70-20131221060635

I'm guessing that the translator didn't actually google Chamomile. That's an actual plant, used to make tea, that can help induce sleep:

http://en.wikipedia.org/wiki/Chamomile

It apparently derives it's name from greek for earth apple.