Nature conservation

Threatened species

Black Gum - 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: Eucalyptus aggregata
Conservation status in NSW: Vulnerable
Commonwealth status: Vulnerable
Gazetted date: 12 Feb 2010
Profile last updated: 19 Aug 2017

Description

Black Gum is a small to medium-sized woodland tree growing to 18 m tall. The the bark on the trunk and main branches is dark greyish-black, deeply fibrous or flaky. The bark does not shed annually. Only the uppermost branches and twigs have smooth whitish, cream or greyish bark that sheds yearly. The juvenile leaves are narrow or oval-shaped, dull green and arranged opposite to one another. The adult leaves are slightly curved and round-ended, about 12 cm long and 1 to 2 cm wide. They are glossy dark green and have the same colour on each surface. The buds, flowers and fruits occur in tight clusters of 7; the clusters are on stalks 3 to 4 mm long. The buds are egg-shaped, 3 to 5 mm long and 2 to 3 mm wide. The flowers are white and are followed by gum-nuts which are cone- or cup-shaped, 2 to 4 mm long and 3 to 5 mm wide. The disc on the surface of the gum-nut has processes (valves) which emerge from the disc.

Distribution

Black Gum is found in the NSW Central and Southern Tablelands, with small isolated populations in Victoria and the ACT. In NSW it occurs in the South Eastern Highlands Bioregion and on the western fringe of the Sydney Basin Bioregion. Black Gum has a moderately narrow distribution, occurring mainly in the wetter, cooler and higher parts of the tablelands, for example in the Blayney, Crookwell, Goulburn, Braidwood and Bungendore districts.

Habitat and ecology

  • Grows in the lowest parts of the landscape.
  • Grows on alluvial soils, on cold, poorly-drained flats and hollows adjacent to creeks and small rivers.
  • Often grows with other cold-adapted eucalypts, such as Snow Gum or White Sallee (Eucalyptus pauciflora), Manna or Ribbon Gum (E. viminalis), Candlebark (E. rubida), Black Sallee (E. stellulata) and Swamp Gum (E. ovata). Black Gum usually occurs in an open woodland formation with a grassy groundlayer dominated either by River Tussock (Poa labillardierei) or Kangaroo Grass (Themeda australis), but with few shrubs.
  • Also occurs as isolated paddock trees in modified native or exotic pastures.
  • Many populations occur on travelling stock reserves, though stands and isolated individuals also occur on private land.
  • There are very few stands in conservation reserves.

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

IBRA Bioregion IBRA Subregion Known or predicted Geographic restrictions region
NSW South Western SlopesCapertee Valley Predicted None
NSW South Western SlopesInland Slopes Predicted the far eastern section of sub-region (in ranges) (likely to be found).
Other StateACT Known None
South East CornerBateman Predicted the far north-western fringe of the sub-region (in the upper ranges).
South East CornerSouth East Coastal Ranges Known north of the Araluen area and only on the western fringe of the sub-region.
South Eastern HighlandsBathurst Known None
South Eastern HighlandsBungonia Known the southern parts of sub-region (likely to be found).
South Eastern HighlandsCapertee Uplands Known None
South Eastern HighlandsCrookwell Known None
South Eastern HighlandsHill End Predicted None
South Eastern HighlandsKanangra Known the southern half of sub-region (likely to be found).
South Eastern HighlandsKybeyan-Gourock Known None
South Eastern HighlandsMonaro Known east of a line that runs north-south about 5 k west of Bungendore
South Eastern HighlandsMurrumbateman Predicted the far eastern fringe of the sub-region (in ranges)(likely to be found), the far eastern section of sub-region (in ranges) (likely to be found).
South Eastern HighlandsOberon Known None
South Eastern HighlandsOrange Known None
Sydney BasinBurragorang Known None
Sydney BasinEttrema Known the western fringe of the sub-region (in upper ranges)