Nature conservation

Threatened species

Illawarra Zieria - profile

Indicative distribution


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Key:
known
predicted
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: Zieria granulata
Conservation status in NSW: Endangered
Commonwealth status: Endangered
Profile last updated: 17 Aug 2018

Description

A tall bushy shrub that grows to 6 m. The entire plant is densely covered with glandular tubercles (small wart-like outgrowths) that give a strong aroma when crushed. Its leaves consist of three narrow leaflets that are dull green above, pale green below, 19.5 to 42.5 mm long, and have downward curved margins. Its small white flowers grow in dense many-flowered clusters. The fruit is a dry, light brown capsule containing dark reddish brown seeds to 2 mm long.

Distribution

Restricted to the Illawarra region where it is recorded from a number of sites. The species primarily occupies the coastal lowlands between Oak Flats and Toolijooa, in the local government areas of Shellharbour and Kiama. This is a range of approximately 22 kilometres.

Habitat and ecology

  • The typical habitat is dry ridge tops and rocky outcrops on shallow volcanic soils, usually on Bumbo Latite. Less frequently found on the moist slopes of the Illawarra escarpment and in low-lying areas on Quaternary sediments.
  • Associated vegetation includes Bracelet Honey-myrtle Melaleuca armillaris scrub, Forest Red Gum Eucalyptus tereticornis woodland and rainforest margins, although the species has been recorded from a number of other vegetation types. Most vegetation types are also listed as Endangered Ecological Communities.
  • Much of the natural habitat for the species has been removed and many sites now occupy road verges and paddock edges.
  • Flowering occurs between early spring and summer.
  • Seed dispersal is initially through forcible ejection from the mature fruit, and it is suspected that secondary dispersal by ants also occurs. Mass germination of seeds has been observed following soil disturbance.
  • Observed to coppice from damaged stems in response to physical disturbance including grazing and slashing, although the age at which the species is capable of this is not known.
  • Response to fire not known.

Regional distribution and habitat

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


Threats

Recovery strategies

Activities to assist this species

Information sources

IBRA Bioregion IBRA Subregion Known or predicted Geographic restrictions region
Sydney BasinIllawarra Known None