Taxon Name Usage: https://staging-id.biodiversity.org.au/instance/apni/750746
- nomenclatural synonym: Castanospermum australe A.Cunn. ex Mudie var. australe
- orthographic variant: Castamospermum australe Macarthur & C.Moore
- taxonomic synonym: Castanospermum australe A.Cunn. & C.Fraser ex Hook. nom. illeg.
- taxonomic synonym: Castanospermum australe var. brevivexillum F.M.Bailey
- taxonomic synonym: Castanospermum brevivexillum (F.M.Bailey) Domin