Prostanthera serpyllifolia subsp. microphylla (R.Br.) B.J.Conn

Small-leaf Mint-bush

J. Adelaide Bot. Gard. 6: 292 (1984) APNI

Taxonomic status:Accepted

Occurrence status:Present

Establishment means:Native

Shrub to 0.5(–1.6) m high; branches and leaves sparsely to densely hairy, hairs recurved to reflexed, often appearing curled.  Leaves ovate to broadly elliptic (rarely narrowly ovate), (1–)1.5–3(–3.8) mm long, (0.5–)0.7–1.3(–2.7) mm wide, often reflexed, base obtuse to rounded, sometimes c. truncate; petiole 0–0.3(–0.5) mm long. Flowers appearing axillary; bracteoles mostly 2–4 mm long.  Calyx (4.3–)5–7.5(–9.5) mm long, maroon or green, tube 3–5 mm long, lobes 1.5–2.2 mm long; corolla bright pink to mid red, often white basally, and/or with yellow tinge distally or light metallic blue-green, rarely wholly yellow, tube 9–14 mm long; anther appendage c. 1 mm long.  Flowers spring.

LoM, MuM, RobP, VRiv, Wim. In Victoria to the far north-west, but locally common in mallee communities, particularly on loamy and sandy soils which are overlying and associated with limestone.

Subspecies serpyllifolia differs in its larger (to 14 mm long and 4 mm wide) leaves that are usually not recurved or reflexed, and the longer (to 12 mm) calyx.  It is endemic in South Australia, on the Eyre Peninsula. 

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: Neville Walsh, 2019-03-06
Hero image
Distribution map


Source: AVH (2014). Australia's Virtual Herbarium, Council of Heads of Australasian Herbaria, <>. Find Prostanthera serpyllifolia subsp. microphylla in AVH ; Victorian Biodiversity Atlas, © The State of Victoria, Department of Environment and Primary Industries (published Dec. 2014) Find Prostanthera serpyllifolia subsp. microphylla in Victorian Biodiversity Atlas
  Bioregion Occurrence status Establishment means
Lowan Mallee present native
Murray Mallee present native
Wimmera present native
Victorian Riverina present native
Robinvale Plains present native

State distribution

Distribution map
Western Australia
South Australia
New South Wales