New combinations in Pentapogon R.Br. (Poaceae) are provided for three endemic Aotearoa / New Zealand species earlier placed in Deyeuxia Clarion ex P.Beauv.: Pentapogon aucklandicus (Hook.f.) de Lange & L.M.H.Schmid, comb. nov. (Deyeuxia aucklandica (Hook.f.) Zotov), P. lacustris (Edgar & Connor) de Lange & L.M.H.Schmid, comb. nov. (D. lacustris Edgar & Connor), and P. youngii (Hook.f.) de Lange & L.M.H.Schmid, comb. nov. (D. youngii(Hook.f.) Buchanan). These three species were omitted from a recent treatment of Pentapogon proposed by Peterson et al. (2022) in which other Australasian Deyeuxia, D. avenoides (Hook.f.) Buchanan, D. densa Benth., D. frigida F.Muell. ex Benth., D. gunniana (Nees) Benth., D. quadriseta (Labill.) Benth., D. scaberula Vickery, and D. valida (Vickery) Weiller, were transferred to Pentapogon.

Keywords: Deyeuxia, Echinopogoninae, Pentapogon, Pentapogon aucklandicus, Pentapogon lacustris, Pentapogon youngii, Poaceae, Aotearoa / New Zealand, new combinations

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