Biodiversity

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 Corybas sp. Finniss (R.Bates 28794)
Listed as Vulnerable as Corybas dentatus
Listing and Conservation Advices Commonwealth Conservation Advice on Corybas dentatus (Threatened Species Scientific Committee, 2008kr) [Conservation Advice].
 
Commonwealth Conservation Advice on Corybas sp. Finniss (R.Bates28794) (Threatened Species Scientific Committee, 2008kt) [Conservation Advice].
 
Recovery Plan Decision Recovery Plan required, included on the Commenced List (1/11/2009).
 
Adopted/Made Recovery Plans Regional Recovery Plan for Threatened Species and Ecological Communities of Adelaide and the Mount Lofty Ranges, South Australia (Willson, A. & J. Bignall, 2009) [Recovery Plan] as Corybas dentatus.
 
Policy Statements and Guidelines Draft survey guidelines for Australia's threatened orchids (Department of the Environment, 2013b) [Admin Guideline].
 
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 Corybas dentatus.
 
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 Corybas sp. Finniss (R.Bates 28794).
 
State Listing Status
SA: Listed as Endangered (National Parks and Wildlife Act 1972 (South Australia): June 2011 list) as Corybas dentatus
Scientific name Corybas dentatus [55042]
Family Orchidaceae:Orchidales:Liliopsida:Magnoliophyta:Plantae
Species author D.L.Jones
Infraspecies author  
Reference D.L.Jones (1991) Australian Orchid Research 2: 45, Fig. 56
Other names Corysanthes dentata [78681]
Corybas sp. Finniss (R.Bates 28794) [64505]
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.

Illustrations Google Images

Scientific name: Corybas dentatus

Common name: Finniss Helmet Orchid

Individuals have been identified in Scott Conservation Park that appear to be hybrids between Corybas dentatus and C. incurvus (Willson & Bignall 2009).

The Finniss Helmet Orchid is a small herb with a single orbicular (round shaped) leaf, up to 4 cm across. The single flower is 2-3 cm in width and purplish to green in colour (TSSC 2008kr). The species grows in colonies of many individuals (Willson & Bignall 2009).

The Finniss Helmet Orchid is endemic to South Australia and is currently only known from two locations; Sandy Creek Conservation Park and Scott Conservation Park (TSSC 2008kr). There are historic records of the species from Rowland Flat, Gumeracha and Scott Creek Conservation Park, which have not been verified. The species occurs in the Adelaide and Mount Lofty Ranges Natural Resource Management (NRM) region.

Notwithstanding the above, it is noted that the exact distribution of the Finniss Helmet Orchid is uncertain, due to confusion with the co-occurring Slaty Helmet Orchid (Corybas incurvus).

Due to the distance between the two confirmed occurrences of the Finniss Helmet Orchid, they are considered separate populations (Willson & Bignall 2009).

The Finniss Helmet Orchid occurs on damp, grey sandy loam soils in areas with elevation between 250-450 m above sea level (Jones 1991b; Willson & Bignall 2009; TSSC 2008kr). The vegetation community in which the species occurs is generally Pink Gum (Eucalyptus fasciculosa), Brown Stringybark (Eucalyptus baxteri) or Slender Cypress Pine (Callitris gracillis) woodland. Midstorey and understorey species in these communities include Scarlett Bottlebrush (Callistemon rugulosus), Kangaroo Thorn (Acacia paradoxa), Grass Tree (Xanthorrhoea semiplana) and Bracken Fern (Pteridium esculentum). This species is considered to have a high degree of habitat specialisation (Willson & Bignall 2009).

Little is known about the life-cycle of the Finniss Helmet Orchid, except that it is an outcrossing species and that it flowers from July to August (Jones 1991b; Jones 2001 pers. comm.; Willson & Bignall 2009).

The Finniss Helmet Orchid and the co-occurring Slaty Helmet Orchid may be difficult to distinguish. The Finniss Helmet Orchid can be distinguished by the more numerous, much longer and coarser teeth on the margins of the labellum and the inconspicuous, purplish central boss on the labellum, which is not notched on the upper margin. In the Slaty Helmet Orchid, the labellum margins are denticulate (finely toothed) or sometimes nearly entire (not toothed) and the labellum boss is white and conspicuous, with the upper margin deeply notched. The Finniss Helmet Orchid has broader lateral sepals and petals than the Slaty Helmet Orchid and the plants tend to be more robust with slightly larger flowers and much larger leaves (Jones 1991b).

The threats that have been identified as affecting the Finniss Helmet Orchid include illegal collection, climate change, recreational activities, grazing by native and introduced species, weed invasion, clearing for development and herbicide drift (Willson & Bignall 2009).

The Finniss Helmet Orchid is encompassed by the Regional Recovery Plan for Threatened Species and Ecological Communities of Adelaide and the Mount Lofty Ranges, South Australia (Willson & Bignall 2009). This Recovery Plan identifies actions that are designed to achieve recovery of threatened species and ecological communities in the Adelaide and Mount Lofty Ranges bioregion. These actions fall into broad themes, including: abatement of current threats, habitat re-establishment, identifying impediments to recovery, stakeholder engagement and ex-situ conservation.

Existing plans/management prescriptions that are relevant to the species (TSSC 2008kt)

  • Threat Abatement Plan for Dieback Caused by the Root-Rot Fungus Phytophthora cinnamomi (Environment Australia 2001m);
  • Boneseed (Chrysanthemoides monilifera ssp. monilifera) weed management guide (DEH 2003);
  • Bridal creeper (Asparagus asparagoides) weed management guide (DEH 2003e);
  • Threat Abatement Plan for competition and land degradation by feral rabbits (Environment Australia 1999c).

Documents that are relevant to the management of the Finniss Helmet Orchid can be found at the start of the profile.

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
Agriculture and Aquaculture:Agriculture and Aquaculture:Land clearing, habitat fragmentation and/or habitat degradation Commonwealth Conservation Advice on Corybas sp. Finniss (R.Bates28794) (Threatened Species Scientific Committee, 2008kt) [Conservation Advice].
Biological Resource Use:Gathering Terrestrial Plants:Illegal collection Regional Recovery Plan for Threatened Species & Ecological Communities of Adelaide and Mount Lofty Ranges 2009-2014 (Willson, A. & J. Bignall, 2009a) [State Recovery Plan].
Climate Change and Severe Weather:Climate Change and Severe Weather:Climate change altering atmosphere/hydrosphere temperatures, rainfall patterns and/or frequency of severe weather events Regional Recovery Plan for Threatened Species & Ecological Communities of Adelaide and Mount Lofty Ranges 2009-2014 (Willson, A. & J. Bignall, 2009a) [State Recovery Plan].
Ecosystem/Community Stresses:Indirect Ecosystem Effects:Loss and/or fragmentation of habitat and/or subpopulations Commonwealth Conservation Advice on Corybas dentatus (Threatened Species Scientific Committee, 2008kr) [Conservation Advice].
Commonwealth Conservation Advice on Corybas sp. Finniss (R.Bates28794) (Threatened Species Scientific Committee, 2008kt) [Conservation Advice].
Human Intrusions and Disturbance:Recreational Activities:Disturbance, especially from human recreational activities and development Regional Recovery Plan for Threatened Species & Ecological Communities of Adelaide and Mount Lofty Ranges 2009-2014 (Willson, A. & J. Bignall, 2009a) [State Recovery Plan].
Invasive and Other Problematic Species and Genes:Invasive Non-Native/Alien Species:Competition and/or habitat degradation Oryctolagus cuniculus (Rabbit, European Rabbit) Commonwealth Conservation Advice on Corybas sp. Finniss (R.Bates28794) (Threatened Species Scientific Committee, 2008kt) [Conservation Advice].
Regional Recovery Plan for Threatened Species & Ecological Communities of Adelaide and Mount Lofty Ranges 2009-2014 (Willson, A. & J. Bignall, 2009a) [State Recovery Plan].
Invasive and Other Problematic Species and Genes:Invasive Non-Native/Alien Species:Competition and/or habitat degradation by weeds Commonwealth Conservation Advice on Corybas dentatus (Threatened Species Scientific Committee, 2008kr) [Conservation Advice].
Commonwealth Conservation Advice on Corybas sp. Finniss (R.Bates28794) (Threatened Species Scientific Committee, 2008kt) [Conservation Advice].
Regional Recovery Plan for Threatened Species & Ecological Communities of Adelaide and Mount Lofty Ranges 2009-2014 (Willson, A. & J. Bignall, 2009a) [State Recovery Plan].
Invasive and Other Problematic Species and Genes:Invasive Non-Native/Alien Species:Vegetation and habitat loss caused by dieback Phytophthora cinnamomi Threat abatement plan for disease in natural ecosystems caused by Phytophthora cinnamomi (Department of the Environment, Water, Heritage and the Arts (DEWHA), 2009w) [Threat Abatement Plan].
Invasive and Other Problematic Species and Genes:Invasive and Other Problematic Species and Genes:Slashing and herbicide application for weed control Commonwealth Conservation Advice on Corybas sp. Finniss (R.Bates28794) (Threatened Species Scientific Committee, 2008kt) [Conservation Advice].
Invasive and Other Problematic Species and Genes:Problematic Native Species:Competition, predation and/or habitat degradation by kangaroos and wallabies Regional Recovery Plan for Threatened Species & Ecological Communities of Adelaide and Mount Lofty Ranges 2009-2014 (Willson, A. & J. Bignall, 2009a) [State Recovery Plan].
Natural System Modifications:Fire and Fire Suppression:Inappropriate and/or changed fire regimes (frequency, timing, intensity) Commonwealth Conservation Advice on Corybas dentatus (Threatened Species Scientific Committee, 2008kr) [Conservation Advice].
Commonwealth Conservation Advice on Corybas sp. Finniss (R.Bates28794) (Threatened Species Scientific Committee, 2008kt) [Conservation Advice].
Pollution:Airborne Agricultural pollutants:Herbicide drift Regional Recovery Plan for Threatened Species & Ecological Communities of Adelaide and Mount Lofty Ranges 2009-2014 (Willson, A. & J. Bignall, 2009a) [State Recovery Plan].
Pollution:Pollution:Pestitcide application and runoff Commonwealth Conservation Advice on Corybas dentatus (Threatened Species Scientific Committee, 2008kr) [Conservation Advice].
Protected status:Protected status:Lack of secure conservation land tenure Corybas dentatus in Species Profile and Threats (SPRAT) database (Department of the Environment and Heritage (DEH), 2006fh) [Internet].
Transportation and Service Corridors:Roads and Railroads:Development and/or maintenance of roads Commonwealth Conservation Advice on Corybas dentatus (Threatened Species Scientific Committee, 2008kr) [Conservation Advice].
Commonwealth Conservation Advice on Corybas sp. Finniss (R.Bates28794) (Threatened Species Scientific Committee, 2008kt) [Conservation Advice].
Regional Recovery Plan for Threatened Species & Ecological Communities of Adelaide and Mount Lofty Ranges 2009-2014 (Willson, A. & J. Bignall, 2009a) [State Recovery Plan].

Bates, R. (2009). South Australian Native Orchids. Compact Disc. Adelaide: Native Orchid Society of South Australia.

Bates, R.J. (2000). Personal Communication.

Bates, R.J., ed. (2007). South Australian native orchids. Electronic version, October 2007. Native Orchid Society of South Australia.

Department of the Environment and Heritage (2003). Bitou Bush (Chrysanthemoides monilifera) weed management guide. [Online]. CRC for Australian Weed Management. Available from: http://www.environment.gov.au/biodiversity/invasive/weeds/publications/guidelines/wons/pubs/c-monilifera-rotundata.pdf.

Environment Australia (EA) (1999c). Threat Abatement Plan for Competition and Land Degradation by Feral Rabbits. [Online]. Biodiversity Group, Environment Australia. Available from: http://www.environment.gov.au/biodiversity/threatened/publications/tap/rabbits08.html.

Environment Australia (EA) (2001m). Threat Abatement Plan for Dieback Caused by the Root-rot Fungus Phytophthora cinnamomi. [Online]. Available from: http://www.environment.gov.au/biodiversity/threatened/publications/tap/phytophthora.html.

Jones, D.L. (1991b). New Taxa of Australian Orchidaceae. Australian Orchid Research. 2. Essendon: Australian Orchid Foundation.

Jones, D.L. (2001). Personal Communication.

Jones, D.L. (2006). A complete guide to Native Orchids of Australia, including the island Territories. Sydney, NSW: New Holland Publishers (Australia) Pty Ltd.

Jones, D.L. & B. Jones (2000). A field guide to native orchids of southern Australia. Blooming Books: Hawthorn, Victoria.

Threatened Species Scientific Committee (2008kr). Commonwealth Conservation Advice on Corybas dentatus. [Online]. Department of the Environment, Water, Heritage and the Arts. Available from: http://www.environment.gov.au/biodiversity/threatened/species/pubs/78681-conservation-advice.pdf.

Threatened Species Scientific Committee (2008kt). Commonwealth Conservation Advice on Corybas sp. Finniss (R.Bates28794). [Online]. Department of the Environment, Water, Heritage and the Arts. Available from: http://www.environment.gov.au/biodiversity/threatened/species/pubs/64505-conservation-advice.pdf.

Vallee, L., T. Hogbin, L. Monks, B. Makinson, M. Matthes & M. Rossetto (2004). Guidelines for the translocation of threatened plants in Australia - Second Edition. Canberra, ACT: Australian Network for Plant Conservation.

Willson, A. & J. Bignall (2009). Regional Recovery Plan for Threatened Species and Ecological Communities of Adelaide and the Mount Lofty Ranges, South Australia. [Online]. Adelaide, South Australia: Department for Environment and Heritage. Available from: http://www.environment.gov.au/biodiversity/threatened/publications/recovery/adelaide-and-mount-lofty-ranges.html.

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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). Corybas dentatus in Species Profile and Threats Database, Department of the Environment, Canberra. Available from: http://www.environment.gov.au/sprat. Accessed Sat, 20 Sep 2014 19:28:30 +1000.