Lamiaceae Martinov
Prostanthera williamsii B.J.Conn & K.M.Proft , legitimate, scientific
Conn, B.J., Henwood, M.J., Proft, K.M., Scott, J.A., Wilson, T.C. & Howes, R.S. (8 July 2021), An integrative taxonomic approach resolves the Prostanthera lasianthos (Lamiaceae) species complex. Australian Systematic Botany 34(5): 465-466, 468, Fig. 18 [tax. nov.]
  • Type: 'Holotype: New South Wales: Northern Tablelands: Wollomombi Gorge, J.B. Williams s.n., 9 Nov. 1967 (NE)"
taxonomic synonym: Prostanthera lasianthos Rheophytic variant [n/a]
  • Etymology: "This species acknowledges the extensive contribution that the botanist John Beaumont Williams (1932–2005; Bruhl 2005) has made to our understanding of the plants of the New England area of NSW and who also recognised this species as a possible new species, distinct from P. lasianthos."