Listed as ‘Vulnerable’ in Australia under the Commonwealth Environment Protection and Biodiversity Conservation Act 1999, and under NSW and Vic legislation. Listed in the Flora and Fauna Guarantee Act Vic.
SPRAT profile: https://www.environment.gov.au/cgi-bin/sprat/public/publicspecies.pl?taxon_id=15202
Atlas of Living Australia: https://bie.ala.org.au/species/https://id.biodiversity.org.au/node/apni/2891975
Thesium australe is listed in the following regions:
Canberra & Southern Tablelands | South Coast