The Australian has a piece about the current campaign by the Environmental Weeds Action Network (EWAN), to educate gardeners about the invasiveness of the Arum lily (Zantedeschia aethiopica). The South African species, a common fixture in gardens and flower arrangements here in the U.S., has infested miles of riparian ecosystems in Perth (EWAN has also invested a lot of time pulling the darn things out out). Arum lily is illegal to plant in agricultural areas of Australia, because it is toxic to livestock, but continues to be sold elsewhere in the country.
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