Species Profile and Threats Database

For information to assist proponents in referral, environmental assessments and compliance issues, refer to the Policy Statements and Guidelines (where available), the Conservation Advice (where available) or the Listing Advice (where available).
In addition, proponents and land managers should refer to the Recovery Plan (where available) or the Conservation Advice (where available) for recovery, mitigation and conservation information.

EPBC Act Listing Status Listed as Endangered as Zieria buxijugum
Recovery Plan Decision Recovery Plan required, this species had a recovery plan in force at the time the legislation provided for the Minister to decide whether or not to have a recovery plan (19/2/2007).
Adopted/Made Recovery Plans Recovery plan for Zieria formosa, Zieria buxijugum and Zieria parrisiae (NSW National Parks & Wildlife Service, 2002f) [Recovery Plan] as Zieria buxijugum.
Other EPBC Act Plans Threat Abatement Plan for competition and land degradation by unmanaged goats (Department of the Environment, Water, Heritage and the Arts (DEWHA), 2008ada) [Threat Abatement Plan].
Federal Register of
    Legislative Instruments
Declaration under s178, s181, and s183 of the Environment Protection and Biodiversity Conservation Act 1999 - List of threatened species, List of threatened ecological communities and List of threatening processes (Commonwealth of Australia, 2000) [Legislative Instrument] as Zieria buxijugum.
Amendment to the list of threatened species under section 178 of the Environment Protection and Biodiversity Conservation Act 1999 (11/04/2007) (Commonwealth of Australia, 2007f) [Legislative Instrument] as Zieria buxijugum.
State Government
    Documents and Websites
NSW:Review of the Threatened Species Conservation Act Flora Schedules: Recommendations to the Scientific Committee: Final Summary Report December 2002 (Hogbin, P., 2002) [Report].
NSW:Box Range Zieria - profile (NSW Department of Environment, Climate Change and Water (NSW DECCW), 2005nd) [Internet].
NSW:Threatened Species Information: Zieria buxijugum (NSW National Parks & Wildlife Service, 1999aj) [Internet].
NSW:Review of the Threatened Species Conservation Act Schedules 2007-2009 (NSW Scientific Committee (NSW SC), 2009b) [State Species Management Plan].
State Listing Status
NSW: Listed as Critically Endangered (Threatened Species Conservation Act 1995 (New South Wales): August 2014 list) as Zieria buxijugum
Scientific name Zieria buxijugum [56757]
Family Rutaceae:Sapindales:Magnoliopsida:Magnoliophyta:Plantae
Species author J.D.Briggs & J.A.Armstrong
Infraspecies author  
Reference Australian Systematic Botany 15(3): 320, fig. 20-21, map fig. 22 (2002).
Other names Zieria sp. 14 (sp. 'P'; Box Range North) [24544]
Zieria buxijugum Briggs & Armstrong ms. [67255]
Zieria buxijugum J.Briggs & J.A.Armstrong ms. [67358]
Zieria sp. G [68099]
Distribution map Species Distribution Map

This is an indicative distribution map of the present distribution of the species based on best available knowledge. See map caveat for more information.

Other illustrations Google Images

This species forms an erect shrub up to 3.5 m high (NSW NPWS 2002f; Armstrong 2002) with moderately conspicuous white flowers up to 7 mm in diameter (Armstrong 2002).

Z. buxijugum is known from a single population on Box Range Farm, about 15 km west of Pambula on the far south coast of NSW (Armstrong 2002; Harden 2002; NSW NPWS 2002f).

In 1987, population size was estimated at 68 adult plants of more than 1 m in height (Briggs & Leigh 1990). A survey in Feb. 1999 found 121 individuals of this size (NSW NPWS 2002f). Most had died back during the 1997/8 drought but were vigorously resprouting from their bases and lower stems (NSW NPWS 1999aj). By April 2001, the numbers had reduced to only 32 adult plants, although there were another 273 smaller plants. This reflected browsing damage in winter 2000 to adult plants and vigorous seedling regeneration since the 1997/98 drought (NSW 2002f; Armstrong 2002)..

The population is restricted to an area of about 0.4 ha (NSW NPWS 2002f) and is on private freehold land most of which is zoned for rural residential use. The species is not known to occur within a conservation reserve (Briggs and Leigh 1990; Briggs & Leigh 1996; NSW NPWS 2002f).

Synonyms include Zieria sp. G., Z. sp. 14, Z. sp. O and Z. sp. P (Box Range North) (NSW NPWS 1999aj).

This species occurs on a steep slope with an easterly aspect on an ignimbrite rock outcrop. The soil is a skeletal brown loam with a high organic matter content (Briggs & Leigh 1990). Conditions can be extremely hot in summer and often very dry, particularly in winter (NSW NPWS 2002f).

It grows, mainly in full sun, in a shrubby heath community surrounded by Eucalyptus sieberi - E. muelleriana open forest (Briggs & Leigh 1990; Armstrong 2002; Harden 2002; NSW NPWS 2002f). The shrub community is dominated by Melaleuca armillaris and has a sparse understorey containing Cassinia longifolia, Plectranthus parviflorus, Olearia iodochroa, Platysace lanceolata and Dendrobium speciosum (Briggs & Leigh 1990).

Competition for seedlings and young plants from other understory species appears relatively low; there is much exposed rock at the site and few other sub-shrubs or herbaceous species are present (NSW NPWS 2002f).

This species flowers in Sept. (Briggs & Leigh 1990; NSW NPWS 1999aj, 2002f; Armstrong 2002). It is almost certainly pollinated by insects; native bees, hover flies and blowflies have been observed visiting the flowers. Fruit at all stages through to maturity can be found on plants in Nov. The fruits develop and ripen rapidly, and seed shed appears to be almost complete by the end of Dec. (NSW NPWS 2002f; Armstrong 2002).

The mature plants flower prolifically and high levels of fruit set were observed in 1986/87 (J. Briggs pers. comm. in NSW NPWS 2002f). Seedlings of varying size are present at the site, suggesting some recruitment probably would occur in most years in the absence of browsing (NSW NPWS 2002f).

The following table lists known and perceived threats to this species. Threats are based on the International Union for Conservation of Nature and Natural Resources (IUCN) threat classification version 1.1.

Threat Class Threatening Species References
Ecosystem/Community Stresses:Indirect Ecosystem Effects:Restricted geographical distribution (area of occupancy and extent of occurrence) Zieria buxijugum in Species Profile and Threats (SPRAT) database (Department of the Environment and Heritage (DEH), 2006wz) [Internet].
Invasive and Other Problematic Species and Genes:Invasive Non-Native/Alien Species:Grazing, tramping, competition and/or habitat degradation Capra hircus (Goat) Zieria buxijugum in Species Profile and Threats (SPRAT) database (Department of the Environment and Heritage (DEH), 2006wz) [Internet].
Invasive and Other Problematic Species and Genes:Problematic Native Species:Competition, predation and/or habitat degradation by kangaroos and wallabies Zieria buxijugum in Species Profile and Threats (SPRAT) database (Department of the Environment and Heritage (DEH), 2006wz) [Internet].
Natural System Modifications:Fire and Fire Suppression:Inappropriate and/or changed fire regimes (frequency, timing, intensity) Zieria buxijugum in Species Profile and Threats (SPRAT) database (Department of the Environment and Heritage (DEH), 2006wz) [Internet].
Protected status:Protected status:Lack of secure conservation land tenure Zieria buxijugum in Species Profile and Threats (SPRAT) database (Department of the Environment and Heritage (DEH), 2006wz) [Internet].
Species Stresses:Indirect Species Effects:Low numbers of individuals Zieria buxijugum in Species Profile and Threats (SPRAT) database (Department of the Environment and Heritage (DEH), 2006wz) [Internet].

Armstrong, J.A. (2002). Zieria (Rutaceae): a systematic and evolutionary study. Australian Systematic Botany. 15:277-463.

Briggs, J.D. & J.H. Leigh (1990). Delineation of Important Habitats of Threatened Plant Species in South-Eastern New South Wales. Canberra: Australian Heritage Commission.

Briggs, J.D. & J.H. Leigh (1996). Rare or Threatened Australian Plants - Revised Edition. Collingwood: CSIRO Publishing.

Harden, G.J. (ed.) (2002). Flora of New South Wales, Volume Two - rev. edn. University of New South Wales Press, Sydney.

Keith, D. & E. Ashby (1992). Vascular Plants of Conservation Significance in the South East Forests of New South Wales. Page(s) 210. NSW National Parks and Wildlife Service. Hurstville, NSW National Parks &Wildlife Service.

Meredith, L.D. & M.M. Richardson (1990). Rare or Threatened Australian Plant Species in Cultivation in Australia. Report Series No. 15. Page(s) 1-114. Canberra: Australian National Parks and Wildlife Service.

NSW National Parks & Wildlife Service (1999aj). Threatened Species Information: Zieria buxijugum. [Online]. Hurstville: NSW NPWS. Available from:

NSW National Parks & Wildlife Service (2002f). Recovery plan for Zieria formosa, Zieria buxijugum and Zieria parrisiae. [Online]. Hurstville, NSW: NSW National Parks and Wildlife Service. Available from:

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This database is designed to provide statutory, biological and ecological information on species and ecological communities, migratory species, marine species, and species and species products subject to international trade and commercial use protected under the Environment Protection and Biodiversity Conservation Act 1999 (the EPBC Act). It has been compiled from a range of sources including listing advice, recovery plans, published literature and individual experts. While reasonable efforts have been made to ensure the accuracy of the information, no guarantee is given, nor responsibility taken, by the Commonwealth for its accuracy, currency or completeness. The Commonwealth does not accept any responsibility for any loss or damage that may be occasioned directly or indirectly through the use of, or reliance on, the information contained in this database. The information contained in this database does not necessarily represent the views of the Commonwealth. This database is not intended to be a complete source of information on the matters it deals with. Individuals and organisations should consider all the available information, including that available from other sources, in deciding whether there is a need to make a referral or apply for a permit or exemption under the EPBC Act.

Citation: Department of the Environment (2014). Zieria buxijugum in Species Profile and Threats Database, Department of the Environment, Canberra. Available from: Accessed Sat, 20 Sep 2014 01:37:40 +1000.