Blakely, W.F. (1929), A Further Contribution to our Knowledge of the Flora of New South Wales. Proceedings of the Linnean Society of New South Wales 54(5): 684 [tax. nov.]

• Type: "In hard sandstone gravelly soil between Sackville Reach and Maroota (Mr. and Mrs. T.J. Howell and W.F.B, September, 1927); in somewhat similar soil at Glenorie and also on the Canoe Grounds near Colo Trigonometrical Station, 861 feet above sea-level (D. W.C. Shiress and W.F.B., 14th October, 1927); between Lane Cove River and Gordon (C.T.White and W.F.B., 28th November, 1927)."

Beadle, N.C.W., Evans, O.D. & Carolin, R.C. (1962), Handbook of the Vascular Plants of the Sydney District and Blue Mountains: 421 [secondary reference]

Althofer, G.W. (June 1978), Cradle of Incense: The Story of Australian Prostanthera: 12-13, 130-131, 135-137, 175 [secondary reference]

• Etymology: "after W. Howell"

Jacobs, S.W.L. & Pickard, J. (1981), Plants of New South Wales: 137 [secondary reference]

Conn, B.J. in Harden, G.J. (ed.) (1992), Lamiaceae. Flora of New South Wales 3: 652 [secondary reference]

National Herbarium of New South Wales (2009), PlantNET Flora of New South Wales Online: - [secondary reference]

Council of Heads of Australasian Herbaria (2010), Australian Plant Census: - APC [secondary reference]

orthographic variant: Prostanthera howellae Blakely orth. var.

• APC Dist.: NSW

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