Tee, to be honest, I thought it was a native species (it looks very similar to Kangaroo Grass). And yes, I had several large clumps that people used to admire because of their colour and of which I used to skite about and lecture people about growing beautiful native grasses.
Later, it was hard work knocking it back. A loosing battle though - the next door allotment is just full of it and it continually reseeds. Oh, the perils of drink.
