Climbing weed. If it is what I think it is (sorry, no complete name) it can turn into a very big mess
Known location, five new plants found. Two in the open, two coming through flattened marram, and one in a tangle of Spinifex.
Cluster of plants growing on edge of a stream with Arum lily. Tallest ones are approx 5-6ft. Stem is tall and erect not drooping.
On the eastern loop, a serious environmental weed in this situation.