Basionym Name:Capnodium expansum Berk. & Desm., in Berkeley, Journal of the Royal Horticultural Society 4: 253 (1849)
Homotypic synonyms:Polychaeton expansum (Berk. & Desm.) Speg., Physis, Rev. Soc. Arg. Cienc. Nat. 4(no. 17): 294 (1918)