Nature conservation

Threatened species

Myriophyllum implicatum - profile

Indicative distribution

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The areas shown in pink and/purple are the sub-regions where the species or community is known or predicted to occur. They may not occur thoughout the sub-region but may be restricted to certain areas. ( click here to see geographic restrictions). The information presented in this map is only indicative and may contain errors and omissions.
Scientific name: Myriophyllum implicatum
Conservation status in NSW: Critically Endangered
Commonwealth status: Not listed
Gazetted date: 16 Jul 2010
Profile last updated: 03 Jan 2019


Creeping matted herb, 2-10cm high. Stems are erect and unbranched with monomorphic (only one form) leaves. The leaves are alternate, linear and with entire margins, up to 5mm long and 0.7mm wide. Flowers are solitary in the axils of the leaves. Plants are dioecious (male and female flowers borne on separate plants). Sepals are absent in male flowers with petals cream-red in colour and 2-2.5mm long. Sepals and petals are absent in female flowers. Styles of the female flower are sessile, with white stigmas. Fruit is sessile, reddish-purple and about 0.8mm in diameter.


This species was previously thought to be extinct in NSW; however the plant was recently discovered in the Pilliga National Park, south of Narrabri. It is known from Queensland and is listed as ‘Least Concern’ under that States Nature Conservation Act (1992).

Habitat and ecology

  • Occurs in moist situations, extending away from fresh water.
  • Recent population found in a large open partly inundated gilgai depression on cracking clay soil.
  • Probably germinates opportunistically (with inundation).
  • Flowering is reported from August into summer, and fruiting until February.

Regional distribution and habitat

Click on a region below to view detailed distribution, habitat and vegetation information.


Recovery strategies

Activities to assist this species

Information sources

IBRA Bioregion IBRA Subregion Known or predicted Geographic restrictions region
Brigalow Belt SouthPilliga Predicted None
Brigalow Belt SouthPilliga Outwash Known None
Darling Riverine PlainsCastlereagh-Barwon Predicted None
Darling Riverine PlainsCulgoa-Bokhara Known None