A tall shrub to tree, reaching to 6 m tall.
Grows near the coast and is found as far north as Nambour and Nerang in south-eastern Queensland, extending down the south coastal areas of New South Wales to around Batemans Bay.
It is often found to inhabit the borders of rainforests in wet or dry sclerophyll forest.
Australian Wattles at least, can be broadly placed into 1 of 3 recognisable groups:
This wattle belongs to Group 2.
The phyllodes (modified leaves) are thin and dark green and are usually straight with a length to 18 cm, and a width to 1 cm.
Flowers are produced in linear spikes consisting of many small staminate flowers. Spikes are produced singularly or in pairs, in the axils of phyllodes, to 5 cm long, pale yellow to white and occur between January and May.
Seed pods are straight or slightly curved and usually 14 cm long, to 0.4 cm wide.
Attractive slender erect small tree suited to gardens in a full sun/shade position with some moisture and even waterlogged soils.
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 seed after fire with some species exhibiting suckering from the base.
Acacia is a highly diverse genus, with over 1500 recognised species (placing it in the top-10 most-diverse plant genera) occurring in most continents except for Europe. Australia has about 970 spp., most of which are endemic. There are also about 10 exotic species. NSW has about 235 recognised species. Some species have become weeds in other states outside of their natural range (e.g., wattles from Western Australia into NSW and vice versa).
Acacia – from Greek Akakia – which refers to an Ancient Greek preparation made from one of the many species; the name of which derives from akis, meaning “thorn” – referring to the thorns of species in Africa.
longissima – Latin for “longest” referring to the long narrow phyllodes of this particular species.
This species is not considered to be at risk of extinction in the wild.
Wikipedia – Acacia longissima profile page https://en.wikipedia.org/wiki/Acacia_longissima
NSW Flora Online (PlantNET) – Acacia longissima profile page