Topic summary
Speirochoric
Extracted from the Wikipedia article Hemerochory.
Speirochory
Speirochoric plants are sown on human-prepared soil and are competitors of the crops. Plants that are considered to be archaeophytes, such as the poppy, native to the Mediterranean area, the real chamomile, the cornflower and field buttercup, spread through the seeds with the grain in Central Europe. In the meantime, the seeds are cleaned more thoroughly using modern methods and the cultivation is hardly contaminated by pesticides or other control techniques.