Naturalised within roadside garden and car park - this is the diploid race incorrectly attributed to Hibiscus trionum (an African tetraploid - see Craven et al 2011). Currently treated as naturalised to New Zealand, this race may infact be indigenous (if not endemic) as so far I have been unable to match it to any of the other races of H. trionum sensu lato present in Australia, Europe or the USA.

Irrespective - at this location, this plant was clearly naturalised.

Craven, L.A.; de Lange, P.J.; Lally, T.R.; Murray, B.G.; Johnson. S.B. 2011. The indigenous Australasian bladder ketmia species (Hibiscus trionum complex, Malvaceae). New Zealand Journal of Botany 49: 27–40.