Indicative distribution
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.
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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
Gazetted date:
28 Nov 1997
Profile last updated:
24 Jul 2019
Description
A low spreading pea-flower shrub usually to a metre high, but may grow taller when competing with other shrubs. 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 more common yellow-flowered Dillwynia glaberrima and D. floribunda.
Further information about the species is available in the profile for the species, as linked on this page.
Distribution
The endangered population occurs in the area bounded by Western Road, Elizabeth Drive, Devonshire Road and Cross Street, Kemps Creek in the Liverpool Local Government Area.
Habitat and ecology
- The population occurs on a small outlier of the Berkshire Park Soil Landscape. The site supports a transition from Castlereagh Ironbark Forest to Castlereagh Scribbly Gum Woodland. Portions of the site contain a form of Shale Gravel Transition Forest
- Has been estimated to contain between 10,000 and 219,000 individuals, although abundance and population structure are influenced by past localised disturbance history
- 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.
Threats
- Weeds affecting this population are reasonably diverse, including woody weeds like African Olive, climbing weeds like bridal creeper, and herbaceous weeds, including both forbs and grasses.
- Inappropriate fire regimes will affect the ability of the species to recruit. Periods of less than 5 years may lead to local extinction, while at least 8 yerars is required between fires to allow seedbanks to develop. 15 years is recommended as an optimum fire interval, with burning undertaken in a mosaic pattern.
- Increased use of the site by vehicles and other recreational users will cause loss by trampling and potential to introduce disease.
- Illegal dumpuing (materials and greenwaste) will have an affect on the species to recruit in disturbed areas, and may also leed to increased weed threats and fire intensity.
- Development of adjacent sites will increase impacts.
Recovery strategies
A Saving Our Species conservation project is currently being developed for this species and will be available soon. For information on how you can contribute to this species' recovery, see the Activities to assist this species section below.
Activities to assist this species
- Fire intervals of 8-20 yrs (where there are no needs for asset protection zones).
- Weed removal and rehabilitation targeting localised occurrences of highly invasive weed species.
- Prevent further loss and fragmentation of habitat.
- Consider fencing appropriate to the site for the exclusion of vehicles to reduce dumping and tramppling.
Information sources
- Fairley, A. and Moore, P. (2000) Native plants of the Sydney district: an identification guide. 2nd Edition. (Kangaroo Press, East Roseville)
- Harden, G.J. (ed.) (2002) Flora of New South Wales. Volume 2, Revised Edition. UNSW, Sydney.
- NSW National Parks and Wildlife Service (1997) Urban Bushland Biodiversity Survey. Native Flora of Western Sydney. NSW NPWS, Hurstville.
- NSW Scientific Committee (1997) Dillwynia tenuifolia (a shrub) population, Kemps Creek - Endangered population determination - final. DEC (NSW), Sydney.
- Robinson, L. (2003) Field guide to the native plants of Sydney. 3rd Edition. (Kangaroo Press, East Roseville)
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IBRA Bioregion
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IBRA Subregion
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Known or predicted
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Geographic restrictions region
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| Sydney Basin | Cumberland |
Known
| Bounded by Western Road, Elizabeth Drive, Devonshire Road and Cross Street, Kemps Creek in the Liverpool LGA |