Nature conservation

Threatened species

Singleton Mallee - profile

Indicative distribution

   Loading map...
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 castrensis
Conservation status in NSW: Endangered
Commonwealth status: Not listed
Gazetted date: 17 Dec 2004
Profile last updated: 26 Jul 2019


This mallee grows to 8m tall. Its bark is smooth, bronze-grey, and sheds in ribbons. The bark on the lower parts of the largest stems is thin dark grey and box-like.

The juvenile leaves are blue-green, dull, disjunct-opposite, ovate to lanceolate, 60-115mm long, 15-40mm wide; with petioles (stem of the leaf) 2-12mm long. Adult leaves are glossy green, disjunct-opposite, lanceolate, acute or apiculate, 60-130mm long, 8-22mm wide; with petioles 4-15mm long.

Mature buds are ovoid, 5-6mm long, 2-4mm diameter. Fruits are cup-shaped, 4-locular, 4-5mm long, 4-6mm diameter. Valves ar broadly triangular, obtuse, deeply enclosed, strongly raised and appressed against disc.


Known only from a single dense stand near Singleton in the lower Hunter Valley. Here it is locally dominant stand over about ten hectares with a number of smaller outlying stands over a 2.5 km range.

Habitat and ecology

  • Very restricted in range, but locally dominant, occurring as a dense mallee stand over about three hectares, on a low broad ridgetop on loam over sandstone.
  • Occurs on a low broad ridgetop on loam over sandstone. The understorey consists of grasses and scattered shrubs, with bare ground and litter.
  • Eucalyptus fibrosa and Corymbia maculata grow adjacent to, but not within, the stand.

Regional distribution and habitat

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


Recovery strategies

Activities to assist this species

Information sources

IBRA Bioregion IBRA Subregion Known or predicted Geographic restrictions region
Sydney BasinHunter Known None