Another factor that may influence the genetic patterns in A. flaccida is the dispersion of species by humans. The seed-bearing A. flaccida infructescence are widely used as medicine and in the manufacturing of pillows and blankets. There are companies that harvest and sell the infructescences throughout southern Brazil. The commercially available infructescences do not undergo processing that hinders germination. Seed germination tests of Achyrocline satureioides, a species in the same genus of A. flaccida, indicated that 25% of the seeds were still viable after 10 months of storage . Then, the movement of seeds by marketing as well as long term seed viability could explain the establishment of a population where the species did not occur, as might be suggested for the Marialva and Porto Barreiro populations. Furthermore, this kind of seed flow may also increase gene flow which can contribute to the genetic similarity between distant populations, like Xanxerê and Marialva.