Gonystylus costalis is a species of plant in the Thymelaeaceae family. It is a tree endemic to Borneo where it is confined to Sarawak.

References

  1. ^ World Conservation Monitoring Centre (1998). "Gonystylus costalis". IUCN Red List of Threatened Species. 1998: e.T38056A10095384. doi:10.2305/IUCN.UK.1998.RLTS.T38056A10095384.en. Retrieved 16 November 2021.