= Canthium barbatum (G.Forst.) Seem.; Fl. Vit. [Seemann] 132 (1866)
= Canthium barbatum f. calcicola Fosberg; Occas. Pap. Bernice P. Bishop Mus. 13: 261 (1937)
= Canthium barbatum f. pitcairnense Fosberg; Occas. Pap. Bernice P. Bishop Mus. 13: 260 (1937), nom. illeg.
= Canthium barbatum f. rurutu Fosberg; Occas. Pap. Bernice P. Bishop Mus. 13: 259 (1937)
= Canthium barbatum f. tubuai Fosberg; Occas. Pap. Bernice P. Bishop Mus. 13: 259 (1937)
= Canthium barbatum var. australense Fosberg; Occas. Pap. Bernice P. Bishop Mus. 13: 159 (1937)
= Canthium barbatum var. christianii Fosberg; Occas. Pap. Bernice P. Bishop Mus. 13: 260 (1937)
= Canthium barbatum var. gambierense Fosberg; Occas. Pap. Bernice P. Bishop Mus. 13: 261 (1937)
= Canthium barbatum var. huahinense Fosberg; Occas. Pap. Bernice P. Bishop Mus. 13: 157 (1937)
= Canthium barbatum var. korrorense (Valeton) Fosberg; Occas. Pap. Bernice P. Bishop Mus. 15(20): 218 (1940)
= Canthium barbatum var. raiateense (J.W.Moore) Fosberg; Occas. Pap. Bernice P. Bishop Mus. 13: 158 (1937)
= Canthium barbatum var. raivavaense Fosberg; Occas. Pap. Bernice P. Bishop Mus. 13: 259 (1937)
= Canthium barbatum var. rapae (L.Riley) Fosberg; Occas. Pap. Bernice P. Bishop Mus. 13: 260 (1937)
= Canthium barbatum var. rupestre (Hosok.) Fosberg; Smithsonian Contr. Bot. 81: 52 (1993)
= Canthium barbatum var. societense Fosberg; Occas. Pap. Bernice P. Bishop Mus. 13: 256 (1937)
= Canthium barbatum var. temehaniense (J.W.Moore) Fosberg; Occas. Pap. Bernice P. Bishop Mus. 13: 158 (1937)
= Canthium korrorense (Valeton) Kaneh.; Bot. Mag. (Tokyo) 46: 671 (1932)
= Canthium rupestre Hosok.; Trans. Nat. Hist. Soc. Taiwan 32: 18 (1942)
= Chiococca barbata G.Forst.; Fl. Ins. Austr. 16 (1786)
= Chiococca odorata Hook. & Arn.; Bot. Beechey Voy. [Hooker & Arnott] 65 (1832)
= Cyclophyllum saviense Guillaumin; Bull. Mus. Natl. Hist. Nat., Sér. 2, 9: 290 (1937)
= Plectronia barbata (G.Forst.) K.Schum.; Nat. Pflanzenfam. [Engler & Prantl] IV, 4: 92 (1891)
= Plectronia korrorensis Valeton; Bot. Jahrb. Syst. 63: 311 (1930)
= Plectronia raiateensis J.W.Moore; Bull. Bernice P. Bishop Mus. 102, 45 (1933)
= Plectronia rapae L.Riley; Bull. Misc. Inform. Kew 1926: 54 (1926)
= Plectronia rapae Riley ex F.Br.; Bull. Bernice P. Bishop Mus. 130, 296 (1935) (descr. ampl.)
= Plectronia temehaniensis J.W.Moore; Bull. Bernice P. Bishop Mus. 102, 45 (1933)