Black-eyed Susan - profile

Indicative distribution


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Key:
known
predicted
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. ( click here to see geographic restrictions). The information presented in this map is only indicative and may contain errors and omissions.
Scientific name: Tetratheca juncea
Conservation status in NSW: Vulnerable
Commonwealth status: Vulnerable
Profile last updated: 30 May 2014

Description

A low shrub that grows in clumps of single or multiple stems. Flowers face downwards and usually have 4 petals which range from white to pink to dark purple in colour. They are borne singly or in twos along the stem. Stems are 30 to 60 cm long, usually leafless with 2 to 3 narrow wings that give them an angular appearance. Plants are usually sprawling and can be difficult to detect amongst other vegetation when not flowering. It may be readily distinguished from other Tetratheca species with which its grows by its distinct winged stem and reduced leaves.

Distribution

Confined to the northern portion of the Sydney Basin bioregion and the southern portion of the North Coast bioregion in the local government areas of Wyong, Lake Macquarie, Newcastle, Port Stephens, Great Lakes and Cessnock.

Habitat and ecology

  • It is usually found in low open forest/woodland with a mixed shrub understorey and grassy groundcover. However, it has also been recorded in heathland and moist forest.
  • The majority of populations occur on low nutrient soils associated with the Awaba Soil Landscape.
  • While some studies show the species has a preference for cooler southerly aspects, it has been found on slopes with a variety of aspects.
  • It generally prefers well-drained sites below 200m elevation and annual rainfall between 1000 - 1200mm. The preferred substrates are sandy skeletal soil on sandstone, sandy-loam soils, low nutrients; and clayey soil from conglomerates, pH neutral.
  • It usually spreads via underground stems which can be up to 50 cm long. Consequently, individual plants may be difficult to identify. It also reproduces sexually but this requires insect pollination.
  • Large populations of this species are particularly important.

Regional distribution and habitat

Click on a region below to view detailed distribution, habitat and vegetation information.


Threats

Recovery strategies

Activities to assist this species

Information sources

CMA CMA sub-region Known or predicted Geographic restrictions region
Hunter-Central RiversHunter Known None
Hunter-Central RiversKaruah Manning Known None
Hunter-Central RiversUpper Hunter Known None
Hunter-Central RiversWyong Known None