Pseudanthus divaricatissimus (Müll.Arg.) Benth. legitimate | sensu Halford, D.A. & Henderson, R.J.F. (3 December 2003), Studies in Euphorbiaceae A.L.Juss. sens. lat. 5. A revision of Pseudanthus Sieber ex Spreng. and Stachystemon Planch. (Oldfieldioideae Kohler & Webster, Caletieae Mull.Arg.). Austrobaileya 6(3)
Caletia divaricatissima Müll.Arg. legitimate Caletia divaricatissima Müll.Arg. var. divaricatissima legitimate Caletia divaricatissima var. genuina Müll.Arg. nom. inval. Pseudanthus divaricatissimus (Müll.Arg.) Benth. var. divaricatissimus legitimate Pseudanthus divaricatissimus var. genuinus (Müll.Arg.) Grüning nom. inval.
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Pseudanthus divaricatissimus auct. non (Müll.Arg.) Benth.: Jeanes, J.A. (1999) [fide Council of Heads of Australasian Herbaria (2009)] = Pseudanthus orbicularis (Müll.Arg.) Halford & R.J.F.Hend.