Ange and all, FWIW i have just uploaded this other sighting of a more advanced growth (sapling still?) vine in an off track area: Premna limbata .
I think these identify as the same species, but i have not yet confirmed that either. Both these sightings' identifications remain for me a slow motion work in progress !
@Ange thank you i appreciate the thoughtful identification suggestion. This sapling of a larger growing plant species, does not have any stinging hairs hence not in the genus Urtica.
Thank you for reminding me to re-consider species in this wet tropics bio-region in this Urticaceae botanical family, as well as the more likely i still think: Lamiaceae botanical family .
Most plants' spp. in this bio-region in this Urticaceae botanical family do not have these opposite attached leaves which this plant in my sighting and _Urtica incisa_ have, hence less likely identification candidates so far as i know these Urticaceae botanical family spp. in this bio-region (about half of the spp. here, i have so far learned first hand in the field.) .