Acacia acuaria is a species of flowering plant in the family Fabaceae and is endemic to the south-western of Western Australia. It is a rounded or diffuse to spreading, prickly shrub with sharply pointed, rigid, needle-shaped phyllodes, flowers arranged in more or less spherical heads of 14 to 23 flowers, and strongly curved or openly coiled pods up to 50 mm (2.0 in) long.

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