BlueShift:You could try http://agpest.co.nz/ it'll help ID your weed, and if you find any cool bugs, it'll ID them too!
Thanks for that. Unfortunately it's not on there, but in any case now that I know what the mature form is I know I don't want it so will be removing them on the weekend.


That one's next to a bus stop and frequently cut back so it doesn't look like much at the moment, it has a reasonably sizeable trunk. Here's a closeup of the leaves with a hand to scale:
So it is a tree, and not something I want in that area. The ferns are there by design, they fill in the shady area under the tree ferns and keep the weeds at bay, but the tree thing is unwanted.
