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 Extinct
Adopted/Made Recovery Plans
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].
 
State Listing Status
NSW: Listed as Extinct (Threatened Species Conservation Act 1995 (New South Wales): December 2013)
Scientific name Persoonia laxa [56270]
Family Proteaceae:Proteales:Magnoliopsida:Magnoliophyta:Plantae
Species author L.A.S.Johnson & P.H.Weston
Infraspecies author  
Reference Telopea 4(2) (1991) 285.
Distribution map Species Distribution Map not available for this taxon.
Illustrations Google Images

Scientific name: Persoonia laxa

The taxonomy is conventionally accepted as Persoonia laxa L.A.S. Johnson & P.H.Weston, and contains the nomenclatural synonym Persoonia nutans subsp. B (CHAH 2009).

Persoonia laxa was a ground-dwelling shrub with smooth bark. The stems were greyish with hairs that curved forward and upward and were flattened against the stem. The young branchlets (smaller branches) were sparsely hairy. The leaves were linear, 8–15 mm long, 1–2 mm wide, flat with curved margins, slightly discoloured. Immature leaves were sparsely hairy and smooth. The flower-heads, which had 1–3 flowers, usually grew into a leafy shoot. The flowers were mostly enclosed by leaves. The pedicels (flower-stalks) were 6–8 mm long and smooth. The tepals (sepals and petals combined, and indistinguishable from each other) were 8–9 mm long, smooth on the outside and tapered to a short, sharp point (NH 2009; Weston 1995b).

Persoonia laxa occurred in Newport and Manly on the northern beaches of Sydney, New South Wales. The species was known from just two specimens; the first collected at Manly in 1907 and the second at Newport in 1908 (NH 2009). A specimen from Dee Why, collected in 1922, was morphologically intermediate between P. laxa and P. levis and could have been a hybrid of these species (Weston 1995b).

Persoonia laxa presumably grew in heath or dry sclerophyll eucalypt woodland, or forest on sandstone, or in coastal sand (Weston 1995b).

Persoonia laxa flowered in summer between November and January (Weston 1995b). There are no records of its fruit or the conditions necessary for flowering.

The reasons for the extinction of Persoonia laxa are unknown. However, as the species formerly occurred in what is now a highly urbanised area (Weston 1995b), it seems likely that its habitat was removed to make way for land development.

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
Uncategorised:Uncategorised:threats not specified Persoonia laxa in Species Profile and Threats (SPRAT) database (Department of the Environment and Heritage, 2006sp) [Internet].

Council of Heads of Australasian Herbaria (CHAH) (2009). Australian Plant Census. [Online]. Australian National Herbarium, Australian National Botanic Gardens and Australian Biological Resources Study . Available from: http://www.anbg.gov.au/chah/apc/.

National Herbarium of NSW (NH NSW) (2009). PlantNet, NSW Flora Online. [Online]. Sydney, NSW: Royal Botanic Gardens & Domain Trust. Available from: http://plantnet.rbgsyd.nsw.gov.au/search/simple.htm.

Weston, P.H. (1995b). Subfam. 1. Persoonioideae. In: Flora of Australia. 16:47-125. Melbourne, Victoria: CSIRO.

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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). Persoonia laxa in Species Profile and Threats Database, Department of the Environment, Canberra. Available from: http://www.environment.gov.au/sprat. Accessed Thu, 24 Apr 2014 07:25:59 +1000.