Acacia triptera is an erect or speading shrub

Shrub

A shrub or bush is distinguished from a tree by its multiple stems and shorter height, usually under 5–6 m tall. A large number of plants may become either shrubs or trees, depending on the growing conditions they experience...

 which is endemic to Australia

Australia

Australia , officially the Commonwealth of Australia, is a country in the Southern Hemisphere comprising the mainland of the Australian continent, the island of Tasmania, and numerous smaller islands in the Indian and Pacific Oceans. It is the world's sixth-largest country by total area...

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It grows to 2 metres high and has decurrent

Decurrent

Decurrent is a term used in botany and mycology to describe plant or fungal parts that extend downward.In botany, the term is most often applied to leaf blades that partly wrap or have wings around the stem or petiole and extend down along the stem...

 phyllodes which are and falcate or sigmoidal

Sigmoidal

Sigmoidal or sigmoid, literally means S-shaped and can refer to:* Sigmoid function* Sigmoidal artery* Sigmoid colon...

 in shape. The bright yellow flowerheads appear from August to November, followed by curled or twisted brown seed pods which are 3 to 8 cm long and 2 to 4 mm wide.

The species occurs on sandhills or rocky outcrops in mallee, woodland or heath in Victoria

Victoria (Australia)

Victoria is the second most populous state in Australia. Geographically the smallest mainland state, Victoria is bordered by New South Wales, South Australia, and Tasmania on Boundary Islet to the north, west and south respectively....

, New South Wales

New South Wales

New South Wales is a state of :Australia, located in the east of the country. It is bordered by Queensland, Victoria and South Australia to the north, south and west respectively. To the east, the state is bordered by the Tasman Sea, which forms part of the Pacific Ocean. New South Wales...

 and Queensland

Queensland

Queensland is a state of Australia, occupying the north-eastern section of the mainland continent. It is bordered by the Northern Territory, South Australia and New South Wales to the west, south-west and south respectively. To the east, Queensland is bordered by the Coral Sea and Pacific Ocean...

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The species was first formally described in 1842 by English botanist George Bentham

George Bentham

George Bentham CMG FRS was an English botanist, characterized by Duane Isely as "the premier systematic botanist of the nineteenth century".- Formative years :...

 in the London Journal of Botany. His description was based on plant material collected from north of the Warrumbungles

Warrumbungles

The Warrumbungles is the name of a mountain range and National Park located in northern New South Wales, Australia. The nearest town to the Warrumbungles is Coonabarabran...

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