Albiziaxanthoxylon C.T. White & W.D. Francis, Proceedings of the Royal Society of Queensland 41: 141, t. X (1929). Archidendropsisxanthoxylon (C.T. White & W.D. Francis) I.C. Nielsen, Bulletin du Muséum National d’Histoire Naturelle. Section B, Adansonia: Botanique Phytochimie 5(3): 326 (1983).

Atherton District, North Queensland, Overseer brothers s.n. (Provisional Forestry Board), end of October, 1927 (Lectotype, designated by I.C. Nielsen as “Type”, Bulletin du Muséum National d’Histoire Naturelle. Section B, Adansonia: Botanique Phytochimie 5(3): 341 (1983): BRI AQ022813! [2 sheets]; isolectotypes: DNA D0053218 image!, K000822329 image!, MEL 1562403A image!).

The protologue of Albiziaxanthoxylon (White and Francis 1929) gave a location, collector name and month of the collection but did not indicate the herbarium in which the type was held, thus meaning that all specimens of this gathering could be considered syntypes. However, it appears that Nielsen inadvertently typified this taxon, according to Art. 7.11 of the ICN (Turland et al. 2018), when providing the description for the new combination of Archidendropsisxanthoxylon with the text “Type: Overseer Brothers, Australia, N. Queensland, Atherton District, Oct 1927, fl. fr. (holo-,BRI; iso-K)” (Nielsen et al. 1983a: p. 341). We believe this satisfies the requirements of Art. 7.11 to effectively lectotypify the name, which means that the BRI specimen is the lectotype and the K specimen is the isolectotype. Interestingly, the material illustrated in the protologue is clearly the isolectotype at K, as it is the only type specimen of Heliodendronxanthoxylon with pods, and the structure of the inflorescence and leaves is almost identical (K000822329; White and Francis 1929).

In Flora of Australia, Cowan (1998) cited BRI as holding an isotype as well as the holotype of this taxon; however, the two sheets have the same collection details, are labelled as sheet 1 of 2 and sheet 2 of 2, and share a single accession number (BRI AQ022813). Therefore, it is herein determined that these are the one collection, and both represent the holotype (now lectotype; BRI AQ022813).