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: Acacia baueri subsp. aspera
Gazetted date:
29 Nov 2024
Profile last updated:
29 Nov 2024
Description
A low growing, well-branched shrub mostly 0.1 - 1 m high with hairy and warty branches. The phyllodes (leaves) are crowded, scattered or in irregular whorls, cylindrical and warty. Flowerheads consisting of 10 - 20 golden yellow flowers occur in the angle between the phyllode and stem. Fruit is a slightly curved pod 1 - 2 cm long. This subspecies differs from A. baueri subsp. baueri which has smoother phyllodes in more regular whorls.
Distribution
Restricted to the Sydney region, occurring on the Kings Tableland in the central Blue Mountains and with sporadic occurrences on the Woronora Plateau in the Royal National Park, Mt. Keira district and at Wedderburn. May also occur on the escarpment/Woronora Plateau in the Flat Rock Junction and Stanwell Tops area of the Illawarra.
Habitat and ecology
- Occurs in low, damp heathlands, often on exposed rocky outcrops over a wide range of climatic and topographical conditions.
- Appears to prefer open conditions; rarely observed where there is any shrub or tree canopy development; and many of the observations of this species have been made following fire, suggesting the species prefers early successional habitats.
- Peak flowering occurs December to March. Pods have been observed to remain on the plants for several months, maturing October to December.
- Fire response is unknown, however, the frequency and intensity of fire is likely to play an important role in the persistence of populations.
Regional distribution and habitat
Click on a region below to view detailed distribution, habitat and vegetation information.
Threats
- Habitat loss due to clearing.
- Illegal access by four-wheel drivers and trail bikes potentially causes physical habitat disturbance and damage to individual plants.
- Requires burning frequently enough to prevent encroachment of competing native vegetation (such as Hakea and Banksia species) and infrequently enough to allow for sufficient recruitment.
- Potential for larger species such as Hakea, Banksia and Allocasuarina species to shade out the Acacia if disturbance is too infrequent.
- This species has not been survey for several years; requires establishment of baseline data.
- Potenial for the crown land to be developed / leased or used for non-conservation purposes.
- Habitat degradation due to roadside maintenance.
- Habitat loss through weed invasion.
Recovery strategies
Priority actions are the specific, practical things that must be done to recover a threatened species, population or ecological
community. The Office of Environment and Heritage has identified
15 priority actions
to help recover the Acacia baueri subsp. aspera in New South Wales.
Activities to assist this species
- Ensure personnel undertaking roadside maintenance are able to identify the species and are aware of its habitat.
- Introduce measures to prevent habitat degradation related to unrestricted access to habitat.
- Undertake appropriate weed control activities when necessary.
- Protect habitat from clearing and fragmentation.
- Effective management of this species will require greater understanding of the role of fire in population persistence.
Information sources
- Fairley, A. (2004) Seldom seen: rare plants of greater Sydney. (Reed New Holland, Sydney)
- Kodela, P.G. and Harden, G.J. (2002) Acacia. Pp 381-476 in Harden, G.J. (ed.) Flora of New South Wales. Volume 2. Revised Edition (New South Wales University Press, Sydney)
- NSW National Parks and Wildlife Service (2000) Acacia baueri subsp. aspera. Environmental impact assessment guidelines. (NPWS, Sydney)
- NSW National Parks and Wildlife Service (2000) Acacia baueri subsp. aspera. Threatened species profile. (NPWS, Sydney)
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