Micromyrtus minutiflora

Family: Myrtaceae

A slender spreading shrub to 2.5 metres high, often with a narrow spread to 1 metre, with a few to many narrow and arching stems, and possibly growing by suckering. 

It has a very small natural distribution, growing in western Sydney, restricted to the general area between Richmond, Penrith and Riverstone in western Sydney.

It grows in well-known endangered ecological communities in western Sydney, namely Cooks River Castlereagh Ironbark Forest, Castlereagh Scribbly Gum Woodland, Shale/Gravel Transition Forest and modified areas of these communities, on tertiary alluvium and consolidated river sediments. 

It is a listed threatened species in the wild. 

Micromyrtus spp. trend to have small, simple and opposite leaves, often decussate (where the projection of each pair of leaves is at a 90-degree turn to the last and next pair); less than 1 cm long and very narrow and also somewhat bent upwards from the middle. In this species, leaves are oblong to ovate, to 4 mm long and 1 mm wide with hairy margins; produced in the decussate arrangement; aromatic with oil glands (seen under a microscope).

Micromytus spp. have very small flowers – cup shaped and rotate, with 5 to 6 petals and with very small sepals. They are usually produced solitary or in 3-flowered clusters, in leaf axils. Yet, the number of flowers is very large. In this species, flowers are produced singularly in leaf axils, sometimes forming small clusters, white in colour with petals about 1 mm long; can be produced profusely. 

The fruit is solitary nut which can hold seeds for a lengthy period past maturity, to about 3 mm long.

In the garden

This plant is a listed threatened species in the wild. As such, it is likely not cultivated to a large degree. It would make a nice garden addition if plants were available. Check with bushcare and other native nurseries for availability. 

It would likely grow readily in plants could be sourced as it responds well to disturbance. It grows on sandy to clayey-alluvial soils naturally, in full sun.


Propagation from seed or soft-wood cuttings. Plants can also be transplanted if needed in a garden situation. 

Other information

This species likely regenerates from seed after fire but may reshoot from basal parts or from suckering, especially if plants are mature.

Micromyrtus is a genus of about 22 species, endemic to Australia, occurring in the mainland states only except for Northern Territory. The genus contains some listed threatened species. NSW currently has 7 species.

Micromyrtus – From Greek micros (μῑκρός) meaning ‘small’ and the genus Myrtus (μύρτος) generally referring to the small growth habit and perhaps the foliage of most species.

minutiflora – Latin – basically meaning ‘minute-flowers’. 

This species is listed as threatened with extinction at both the State and Commonwealth levels with the category of Endangered and Vulnerable respectively. 

NSW Office of Environment and Heritage – Threatened Species Profiles – Micromyrtus minutiflora profile page                         https://www.environment.nsw.gov.au/threatenedSpeciesApp/profile.aspx?id=10529

NSW Flora Online (PlantNET) – Micromyrtus minutiflora profile page https://plantnet.rbgsyd.nsw.gov.au/cgi-bin/NSWfl.pl?page=nswfl&lvl=sp&name=Micromyrtus~minutiflora 

Atlas of Living Australia – Micromyrtus minutiflora profile page https://bie.ala.org.au/species/https://id.biodiversity.org.au/node/apni/2914563

By Jeff Howes. Editing and additional text by Dan Clarke.