This Conservation Advice was approved by the Minister on 30/01/2013.

Approved Conservation Advice for corrugata (a ) (s266B of the Environment Protection and Biodiversity Conservation Act 1999)

This Conservation Advice has been developed based on the best available information at the time this Conservation Advice was approved; this includes existing plans, records or management prescriptions for this species.

Description Grevillea corrugata is a shrub that grows to 2.5 m tall and 2 m wide. Branchlets are slightly angular, openly tomentose and longitudinally ribbed. Leaves are 40–60 mm long and 50–90 mm wide. Leaf margins are curved, enclosing the lower surface of the leaf blade, forming two grooves with the midvein (Hollister and Lander, 2008). Flowers are white in colour, flower stems 30–50 mm in length consisting of approximately 20–50 small branchlets. Fruit is 7–11 mm in length, oblong or ellipsoidal in shape, hairless and non-viscid (sticky) (Olde and Marriot, 1993).

Conservation Status Grevillea corrugata is listed as endangered. This species is eligible for listing as endangered under the Environment Protection and Biodiversity Conservation Act 1999 (Cwlth) (EPBC Act) as the estimated total number of mature individuals is very low (TSSC, 2012). The species is also listed as vulnerable under the Western Australian Wildlife Conservation Act, 1950.

Distribution and Habitat Grevillea corrugata grows in gravelly loam on a roadside in partially cleared eucalyptus woodland. It is known to only occur in two locations, approximately 10 km south of Bindoon (Makinson, 2000). Both locations are recorded as having 20–30 specimens (Olde and Marriott, 1993; WA Herbarium, 2011). This species occurs within the Swan IBRA Bioregion and the Swan Natural Resource Management Region. The distribution of this species is not known to overlap with any EPBC Act-listed threatened ecological community.

Threats There are currently no identified threats to Grevillea corrugata. Potential threats to G. corrugata include grading, chemical spraying, channel construction, mowing and weed competition.

Research Priorities Research priorities that would inform future regional and local priority actions include: • Design and implement a species monitoring program. • More precisely assess population size, distribution, ecological requirements and the relative impacts of threatening processes. • Undertake survey work in suitable habitat and potential habitat to locate any additional populations/occurrences/remnants.

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• Undertake seed germination and/or vegetative propagation trials to determine the requirements for successful establishment.

Priority Actions The following priority recovery and threat abatement actions can be done to support the recovery of Grevillea corrugata.

Habitat Loss, Disturbance and Modification • Monitor known populations to identify key threats. • Monitor the progress of recovery, including the effectiveness of management actions and the need to adapt them if necessary. • Ensure there is no disturbance in areas where Grevillea corrugata occurs, excluding necessary actions to manage the conservation of the species. • Manage any disruptions to water flows. • Investigate formal conservation arrangements, management agreements and covenants on private land, and for crown and private land investigate and/or secure inclusion in reserve tenure if possible. • Contact the local council and inform them of the location of the specimens to ensure that no grading, mowing, chemical spraying or channel construction occurs that would be to the detriment of the species. • Control access routes to suitably constrain public access to known sites on public land. • Suitably control and manage access on private land and other land tenure. • Minimise adverse impacts from land use at known sites.

Invasive Weeds • Ensure chemicals or other mechanisms used to eradicate weeds do not have a significant adverse impact on Grevillea corrugata. • Identify and remove weeds in the local area that could become a threat to Grevillea corrugata, using appropriate methods. • Manage sites to prevent introduction of invasive weeds that could become a threat to G. corrugata, using appropriate methods.

Conservation Information • Raise awareness of Grevillea corrugata within the local community. • Engage with private landholders and land managers responsible for the land on which populations occur and encourage these key stakeholders to contribute to the implementation of conservation management actions.

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Enable recovery of additional sites and/or populations • Undertake appropriate seed collection and storage. • Investigate options for linking, enhancing or establishing additional populations. • Implement national translocation protocols (Vallee et al., 2004) if establishing additional populations is considered necessary and feasible.

This list does not necessarily encompass all actions that may be of benefit to Grevillea corrugata, but highlights those that are considered to be of highest priority at the time of preparing the Approved Conservation Advice.

Existing Plans/Management Prescriptions that are Relevant to the Species An interim recovery plan was developed for a very similar species, G. curviloba subsp. curviloba (English and Phillimore, 2000). The species is so similar to G. corrugata that it was only in 1992 that it was identified as a different species (Olde and Marriott, 1993). and G. corrugata occur in the same area, are endangered by the same threats and share a similar habitat. This recovery plan was developed in September 2000 and many aspects of this recovery plan could also be implemented to support G. corrugata. These prescriptions were current at the time of publishing; please refer to the relevant agency’s website for any updated versions.

References cited in the advice Council of Heads of Australasian Herbaria. (n.d.). Australian Virtual Herbarium. Retrieved September 27, 2011, from http://www.chah.gov.au/avh English V and Phillimore R (2000). Curved-Leaf Grevillea (Grevillea curviloba subsp. curviloba) Interim Recovery Plan 2000–2003. Department of Conservation and Land Management. Hollister, C., & Lander, N. (2008). Grevillea corrugata Olde & Marriott. Retrieved September 27, 2011, from FloraBase: the Western Australian Flora: http://florabase.dec.wa.gov.au/browse/profile/14319 Makinson, R. O. (2000). Grevillea corrugata. In (pp. 432–433, 490). Australian Biological Resources Study. Olde, P. M., & Marriott, N. R. (1993). New species and taxonomic changes in Grevillea (: ) from south-west Western Australia. Nuytsia, 9: 247–249 Vallee, L., Hogbin, T., Monks, L., Makinson, B., Matthes, M., & Rossetto, M. (2004). Guidelines for the translocation of threatened in Australia. Canberra: Australian Network for Conservation. Western Australian Herbarium (WA Herbarium). (2011). Florabase. Retrieved from Florabase – the Western Australian Flora:

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