http://www.onlineopinion.com.au/view.asp?article=7364
Quoting; There is also a discussion paper about the dignity of plants. In due course its astonishing conclusions could become law. Among them is that "decapitation of wild flowers at the roadside without rational reason" is essentially a crime. In fact, the committee was unanimous in its agreement that any "arbitrary harm caused to plants [is] morally impermissible".
So 'decapitating' flowers means to pick a flower. Think of all those people who take 'cuttings' for propagating, who would need to prove that the benefit of new plants outweighs the killing of the original plant!