The flowers were found by Kōzō Tahara, when he was exploring Hell's Gate. He brought back two seeds when he left the Gate and experimented with them. Tahara found out that if the seeds were implanted in a Contractor's body, they would stop the powers of a Contractor from developing for a period of time, but the subject implanted with the seed could transform into Moratoria. The seed would eventually disappear, and a new one would be required. It is impossible to permanently seal a Contractor's power with the seeds. Tahara tested the seeds on his daughter, Mai, in hopes of keeping her from becoming a Contractor. The seed was a small blue dot in her wrist - to "keep her safe" - but in the end, the seed disappeared, and she became a Moratorium. His attempts to artificially grow more flowers and seeds ultimately failed.