Darebin Bush Crew are currently dealing with a cluster of South African Weed Orchids, which they have found in an area near the La Trobe Uni footbridge. They are asking if anyone comes across these emerging weeds along the creek, to post them on iNaturalist. (free biodiversity sharing app for smart devices). A video which details its identification can be found here.
The orchid is a serious threat to Kangaroo Grass (Themeda triandra) dominant grasslands.