I presume the leaves are opposite each other. It is hard to tell from your photos. Recorded as Doubtfully naturalised in the ACT Plant Census 2017, so a specimen to the herbarium would be a good idea. https://apps.lucidcentral.org/plants_se_nsw/text/entities/mirabilis_jalapa.htm This is a fact sheet from a late draft of my app, Plants of South Eastern New South Wales. The beta testing draft of the Android version is available ffom Google Play Store. The Apple version is not available to the public.