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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The information presented in this map is only indicative and may contain errors and omissions.
Scientific name: Grevillea divaricata
Gazetted date:
15 Jun 2001
Profile last updated:
03 Jan 2019
Description
Low shrub to about 0.4 m high. Leaves are entire, well-spaced along the branchlets, spreading and linear, often curved, 8-13 mm long, 0.5-0.6 mm wide, rough to the touch. Flowers in loose clusters of 1-4, colour not known but probably red or red and cream. Until recently, Grevillea divaricata was considered to be synonymous with Grevillea rosmarinifolia. The key differences between Grevillea divaricata and Grevillea rosmarinifolia are the spreading leaves of the former, 0.5-0.6 mm wide and scabrid(rough to touch) on the upper surface (strongly ascending, 0.7-3.0 mm wide and smooth or faintly granulose (finely, mealy) on the upper surface in Grevillea rosmarinifolia), and the sometimes lignotuberous habit.
Distribution
Known only from the type collection made in 1823 by Allan Cunningham, from "north of Bathurst".
Habitat and ecology
- Specimen notes describe the plant as occurring frequently in dry open forest lands and as possibly growing on rocky river margins.
- Flowers recorded in April, but the species probably also flowers in the spring months.
- Plants possibly regenerate from lignotuber and sucker, either naturally or in response to fire. May also be capable of recruitment via rhizomes.
- The fire response of the species is unknown, however type material appears to have been rhizomatous or lignotuberous and capable of semi-basal suckering.
- Flowers are probably bird-pollinated.
Regional distribution and habitat
Click on a region below to view detailed distribution, habitat and vegetation information.
Threats
- No live specimens observed since its collection in 1823
- Habitat loss and landuse.
- Impacts associated with grazing by domestic stock and feral herbivores.
- Changed fire regimes.
- If the species persists, susceptible to extinction via stochastic processes given its presumed restricted distribution and low abundance.
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
- Undertake targeted surveys utilising local knowledge and the known survey routes taken by Allan Cunningham in the 1820s.
- Exclude all landuse from extant sites until more is learned about the species.
- Establish a representative ex-situ population.
- Determine appropriate recovery strategies given tenure, management and physiography of extant sites.
- Investigate species' reproductive biology and ecology, in particular disturbance regimes.
- Following experimental studies of species' fire ecology, implement appropriate fire regimes in-situ: first, in a subset of the total population and subject to intensive monitoring.
Information sources
- Briggs, J.D. and Leigh, J.H. (1996) Rare or Threatened Australian Plants. Revised Edition. (CSIRO Publishing, Melbourne)
- Brown, R. (1830) Prodromus Florae Novae Hollandiae - Supplement 1: Proteaceas Novas (Taylor: London), p. 20.
- Makinson, R.O. (2000) Grevillea. In Harden, G.J., Hardin, D.W. and Godden, D.C. (eds) Proteaceae of New South Wales. University of New South Wales Press, Sydney.
- McGillivray, D.J. (1993) Grevillea. Proteaceae. Melbourne University Press, Melbourne.
- NSW Scientific Committee (2001) Grevillea divaricata (a shrub) - Endangered species determination - final. DEC (NSW), Sydney.
- Pressey, R.L., Cohn, J.S. and Porter, J.L. (1990) Vascular plants with restricted distributions in the Western Division of New South Wales. Proceedings of the Linnean Society of New South Wales 112: 213-227
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