Cestrum parqui, commonly known as green cestrum, green poison berry, Chilean cestrum or willow-leaved jessamine, and is sometimes incorrectly referred to as deadly nightshade, is a species of flowering plant in the family Solanaceae that is native to central and South America. Green cestrum is highly attractive to birds, and seedlings are often found growing under perching trees, along fence lines and on creek banks. It is also dispersed by water. This species is defined as a noxious plant in New South Wales under the Noxious Weeds Act 1993 and all plants must be destroyed.