Nature conservation

Threatened species

Robertson Rainforest in the Sydney Basin Bioregion - 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: Robertson Rainforest in the Sydney Basin Bioregion
Conservation status in NSW: Endangered Ecological Community
Commonwealth status: Not listed
Gazetted date: 15 Jun 2001
Profile last updated: 23 Mar 2022


Robertson Rainforest is a warm or cool temperate rainforest with a generally dense structure. It is dominated by Possumwood Quintinia sieberi, Featherwood Polyosma cunninghamii, Sassafras Doryphora sassafras and Blackwood Acacia melanoxylon. Common shrub species include Tree Violet Hymenanthera dentata, Prickly Coprosma Coprosma quadrifida and Brush Pepperbush Tasmannia insipida.


Robertson Rainforest has a restricted distribution in the eastern parts of the Southern Highlands of NSW. There are two main occurrences of the community within this distribution; the principal occurrence is on the Robertson Plateau around the town of Robertson on the Southern Highlands; the second is on the higher parts of the Cambewarra Range further to the south where it is less widespread. It occurs in the Wingecarribee and Shoalhaven local government areas, but may occur elsewhere in the Sydney Basin Bioregion.

Habitat and ecology

  • Occurs almost exclusively on highly fertile soils derived from basalt and basanite.
  • Occurs on the gently undulating Robertson Plateau in the eastern parts of the Southern Highlands, at altitudes of between 500 to 700 metres.
  • Appears to be restricted to the Robertson Basalt; no observations of the community have been recorded on the surrounding Wianamatta Shale.
  • Disturbed remnants are considered to form part of the community if the vegetation is likely to respond to assisted natural regeneration.
  • Between 400 and 600 hectares, or about 20% of this community's original extent is estimated to survive.
  • Remnants are highly fragmented, with most occurring on private land.

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
Sydney BasinEttrema Known None
Sydney BasinIllawarra Known Within 8 km of Robertson
Sydney BasinMoss Vale Known Within 8 km of Robertson