Prostanthera rotundifolia R.Br.

Round-leaf Mint-bush

Prodr. 509 (1810) APNI

Taxonomic status:Accepted

Occurrence status:Present

Establishment means:Native

Erect, compact to spreading shrub 0.5–3 m high, 1.5–2.5 m diam., aromatic; branches moderately covered with short curled hairs and subsessile glands. Leaves ovate to obovate or c. orbicular, 3–20 mm long, 3–15 mm wide, mid-green (rarely c. silvery), moderately to densely glandular, glabrous except midrib often sparsely to moderately hairy, base attenuate and decurrent to broadly cuneate, margin entire or irregularly lobed or crenate, apex rounded; petiole 2–8 mm long. Flowers appearing axillary; bracteoles not persistent, 1–2 mm long, 0.2–0.3 mm wide. Calyx 4–5 mm long, tube 2–3.5 mm long, adaxial lobe 1.5–2 mm long (slightly enlarged in fruit); corolla purple-mauve to purple, sometimes pinkish, 10–15 mm long; anthers lacking appendages, each lobe with a tuft of basal hairs. Flowers Sep.–Nov.

CVU, DunT, EGL, EGU, GipP, Gold, GGr, HNF, HSF, MonT, NIS, SnM, VAlp, VVP, Wim. Also Qld, NSW, Tas. Widespread and locally common, in habitats ranging from sheltered sites in closed or open sclerophyll forests and rainforest margins, to exposed rocky areas, often in elevated sites.

The leaves of this species are extremely variable in size, texture and shape. In drier areas the leaves tend to be small, orbicular to ovate and sometimes obscurely crenate. A rather distinctive form with rather slender, erect branches and c. silvery leaves occurs in exposed, rocky sites in the eastern ranges (e.g. Mt Wellington area, Nunniong Plateau, Mt Tingaringy).

Source: Conn, B.J. (1999). Lamiaceae. In: Walsh, N.G.; Entwisle, T.J. (eds), Flora of Victoria Vol. 4, Cornaceae to Asteraceae. Inkata Press, Melbourne.
Updated by: Val Stajsic, 2018-08-24
Hero image
Distribution map
life Life
kingdom Plantae
phylum Tracheophyta
superorder Asteranae
order Lamiales
family Lamiaceae
genus Prostanthera
Higher taxa


Source: AVH (2014). Australia's Virtual Herbarium, Council of Heads of Australasian Herbaria, <>. Find Prostanthera rotundifolia in AVH ; Victorian Biodiversity Atlas, © The State of Victoria, Department of Environment and Primary Industries (published Dec. 2014) Find Prostanthera rotundifolia in Victorian Biodiversity Atlas
  Bioregion Occurrence status Establishment means
Wimmera present native
Victorian Volcanic Plain present native
Gippsland Plain present native
Goldfields present native
Central Victorian Uplands present native
Greater Grampians present native
Dundas Tablelands present native
Northern Inland Slopes present native
East Gippsland Lowlands present native
East Gippsland Uplands present native
Highlands-Southern Fall present native
Highlands-Northern Fall present native
Monaro Tablelands present native
Victorian Alps present native
Snowy Mountains present native

State distribution

Distribution map
New South Wales
Australian Capital Territory