The bright yellow globular flowerheads appear singly or in groups of two in the axils of the phyllodes from September to November, followed by curved seed pods which are 5 to 9 cm long and 2 to 4 mm wide.

[3][4] The species was formally described in 1967 by botanist Jim Willis based on plant material collected from Pine Mountain in north-eastern Victoria.

[4] It was reclassified as Racosperma phasmoides by Leslie Pedley in 2003 and then transferred back to genus Acacia in 2006.

[5] Its distribution is limited to a small area on the border between south-eastern New South Wales and north-eastern Victoria.

[6] In New South Wales it is found along the southern edge of Woomargama National Park and has an estimated population of 2000 plants.