 Among the model species on which the hypothesis has been evaluated most recently (in its original form) are "Solidago gigantea" (giant goldenrod), "Sapium sebiferum" (Chinese Tallow), and "Lepidium draba" (whitetop).Of these three model species, the success and behavior of "Sapium sebifurum" agreed most closely with the postulates of the EICA Hypothesis, according to the researches conducting the study.In its study, the success and behavior of "Solidago gigantea" was only partially explained by the EICA hypothesis, according to its researchers.