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Information is provided on three exotic species of Poaceae, Alopecurus aequalis, Dichanthium aristatum and Sporobolus coromandelianus, recently recognised as naturalised or at a stage of naturalising in the state of New South Wales, Australia. These species are superficially similar in appearance to related native species, hence the need for being aware of their possible presence and weed potential.
Lysimachia mauritiana Lam. (family Primulaceae), a small short-lived herb native to India, Indian and Pacific Ocean islands, and coastal east Asia, is described as a new naturalised record from the eastern suburbs of Sydney, New South Wales, Australia. It was first recorded in 1981 near Coogee, and grows in exposed rock crevices and seepages on the seacoast, very similar to its natural habitat overseas. Lysimachia mauritiana is known to have been cultivated in the area in 1961 in a home garden, which is the likely source of this introduction; it appears to be spreading locally as a weed.