Nature conservation

Threatened species

Dillwynia tenuifolia Sieber ex D.C. in the Baulkham Hills local government area - 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: Dillwynia tenuifolia - endangered population
Conservation status in NSW: Endangered Population
Commonwealth status: Not listed
Gazetted date: 07 Nov 2003
Profile last updated: 24 Jul 2019


A low spreading pea-flower shrub usually to a metre high but may be higher when competing with other plants. Its leaves are small and narrow. The wide orange-yellow and red pea-flowers are usually single, at or near the tips of the branches. Both the single orangey flowers and the stem hairs distinguish it from the similar and commoner yellow-flowered Dillwynia glaberrima and D. floribunda.


The endangered population includes all locations for the species within the Baulkham Hills local government area. Only two confirmed locations are known, both near the junction of Wisemans Ferry and Sackville Roads.

Habitat and ecology

  • Occurs in vegetation similar to Cumberland Plain Woodland, on Wianamatta Shale soils.
  • Flowering occurs sporadically from August to March depending on environmental conditions . Pollinators are unknown. The lifespan is estimated to be 20-30 years. It is thought a minimum of 3-4 years is required before seed is produced.
  • Seeds are hard coated and are persistent in the soil seed bank. Dispersal is likely to be localised and ants are the probable vectors
  • Killed by fire and re-establishes from soil-stored seed.

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 BasinYengo Known The Hills LGA (as amended from the Determination)