Characterization of eight invasive alien plant species in Zurich, Geneva and Lugano. Participants (n = 720) had to characterize each species by five opposing attributes (ugly-beautiful, extraordinary-ordinary, exotic-indigenous, unfamiliar-familiar, unwanted-wanted) on 7-step scales (e.g., very ugly, ugly, rather ugly, neither/nor, rather beautiful, beautiful, very beautiful). Mean rating scores and standard errors of means are shown.