MuM, Wim, GleP, Brid, VVP, VRiv, MuF, GipP, OtP, WaP, Gold, CVU, GGr, DunT, NIS, EGL, EGU, WPro, HSF, HNF, OtR, Strz, MonT, VAlp.
There are 2 varieties of Pentapogon quadrifidus. Pentapogon quadrifidus var. parviflorus (Benth.) D.I.Morris has smaller spikelets and as currently understood is confined to Tasmania. See profile under Pentapogon quadrifidus var. quadrifidus.