Grows naturally in eucalypt open forest and woodland on sandstone and shale, between western Sydney and adjacent lower Blue Mountains, from about Wilberforce to Woodford.
It is an erect or spreading shrub growing to 3 m high. The phyllodes (modified leaves) are very narrowly elliptic to linear with a pointed sharp tip, to 5 cm long and to 3 mm wide. Flowers are produced in globular heads with each head having up to 30 flowers. The heads are produced solitarily in the phyllode axils and are up to 8 mm in diameter. Hence, each wattle flower is very small.
The seed pods are to 12 cm long and to 3 mm wide.
Cultivation details are not available
Acacias can suffer from a number of pests, including borers, scale, galls and leaf miners. Growing plants suitable to your local environment minimises these occurring.
Propagation is easy from scarified seed by covering with boiling water for 24 hours and discarding any seeds still floating on the surface.
Most wattles regenerate from the seedbank after fire.
Acacia from Greek acis, a thorn.
trinervata derived from the Latin for “three-veined” and refers to the three-veined phyllodes which are also pungent.
Not considered rare or endangered in the wild.