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.
(
click here to see geographic restrictions).
The information presented in this map is only indicative and may contain errors and omissions.
Scientific name: Seringia denticulata - endangered population
Gazetted date:
06 Oct 2000
Profile last updated:
30 Jul 2019
Description
A rusty, densely haired shrub to 1 - 2 m high. Leaves egg like or oval, usually 8 - 12 cm long, 30 - 40 mm wide, margins toothed, strongly wrinkled and softly to rigidly haired; flower stalk 3 - 8 mm long. White to pinkish flowers occur in clusters of a few flowers; petals pointed. Fruit 10 - 15 mm diameter and very hairy.
Distribution
Occurs in the Hawkesbury local government area, disjunct from other populations and at the southern limit of the species' geographic range. Collections of the endangered population from the Colo River area between Lower Portland and Morans Rock and near Gees Lagoon. Known sub-populations are very small and generally less than 5 plants.
Habitat and ecology
- Occurs in tall open forest with Eucalyptus deanei, Tristaniopsis laurina, Backhousia myrtifolia, Commersonia fraseri, Rulingia dasyphylla and Hibiscus heterophyllus.
- All locations for this species within the Hawkesbury local government area are associated with the endangered Sydney Coastal River-flat Forest.
- Occurs on sandy soil on sandstone banks, edge of floodplains or on road verges. Soils are low in nutrients and well drained.
- Flowers in spring.
- Response to fire is unknown.
Regional distribution and habitat
Click on a region below to view detailed distribution, habitat and vegetation information.
Threats
- Isolated, small population resulting in lack of genetic integrity.
- Weed invasion particularly Lantana and Crofton weeds, degrading the habitat.
- Disturbance from road maintenance and landslips causing habitat loss, and loss of soil seedbank.
- Livestock grazing on river flats damaging plants.
- Deer, goats and pigs foraging and disturbing habitat.
- Severe soil erosion and hydrological disturbance intensified by climate change damaging species habitat.
- Lack of knowledge of species distribution limiting ability to implement targeted management.
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
- Prepare and implement guidelines for road maintenance to minimise habitat disturbance.
- Restrict access (especially vehicles and grazing).
- Prevent further loss, fragmentation and degradation of habitat.
- Restore degraded remnants using bush regeneration techniques such as weed control and supplementary planting.
Information sources
- Benson, D. and McDougall, L. (2001) Ecology of Sydney plant species. Part 8: Dicotyledon families Rutaceae to Zygophyllaceae. Cunninghamia 7(2): 241-462
- 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.) (2000) Flora of New South Wales Vol. 1. UNSW Press, Kensington, NSW.
- NSW Scientific Committee (2000) Keraudrenia corollata var. denticulata in the Hawkesbury Local Government Area - Endangered population determination - final. DEC (NSW), Sydney.
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IBRA Bioregion
|
IBRA Subregion
|
Known or predicted
|
Geographic restrictions region
|
|---|
| Sydney Basin | Wollemi |
Known
| None |
| Sydney Basin | Yengo |
Known
| Colo River area between Lower Portland and Morans Rock and near Gees Lagoon |