but we should remember that the species which become naturalised in new countries are not generally closely allied to the aboriginal inhabitants, but are very distinct forms, belonging in a large proportion of cases, as shown by Alph. de Candolle, to distinct genera.
baina gogoan hartu behar dugu herrialde berrietan etxekotzen diren espezieak ez direla izaten gehienetan bertako biztanleen ahaide hurbilak, zeharo forma ezberdinak baizik, eta kasuen hein handian, Alphonse de Candollek erakutsi duenez, genero ezberdinetakoak.