Towards resolution of the Prostanthera ovalifolia R. Br. assemblage (Lamiaceae: Prostantheroideae): clarification of P. cineolifera R. T. Baker & H. G. Sm. and description of three new species Palsson, Ruth L. Andrew, Rose L. Telford, Ian R. H. Miller, Robert T. Bruhl, Jeremy J. Australian Systematic Botany 2025 2025-06-11 38 3 1 25   Putative new taxon:  Prostantherasp.Mangrove Creek ( D.S. GibbonsNE 49860) R.L.Palsson The single known gathering of this putative new taxon was collected from the currently inundated Mangrove Creek Dam site, 19 kmSW of the Olney State Forest site. This specimen shares leaf size, leaf shape and floral prophyll characters with  P. milleri. In the material from the Mangrove Creek Dam site, the floral bracts are wider with a blunt apex unlike the attenuate apex on scutiform floral bracts in Olney State Forest material. We consider this plant to represent a distinct species and as such, has been excluded from the description and range of  P. milleri.