I have looked into _Smilax aculeatissima_ – perhaps this does not fit neatly well into this species description according the the Flora of Au (online): https://profiles.ala.org.au/opus/foa/profile/Smilax%20aculeatissima .
See also: RFK (2020) ed. 8 : https://apps.lucidcentral.org/rainforest/text/entities/smilax_aculeatissima.htm Flora of Au (online) Smilax page: https://profiles.ala.org.au/opus/foa/profile/Smilax Flora of Au old botanical key (outmoded nowadays, lacking taxa and not linked to in the FoA online?) – via KeyBase: https://keybase.rbg.vic.gov.au/keys/610
Please beware of numerous, known un-described species, with phrase names which occur in north–east Qld here: Ref': APNI : https://biodiversity.org.au/nsl/services/search/names?product=APNI&tree.id=&name=Smilax&inc._scientific=&inc.scientific=on&max=100&display=apni&search=true