Acacia castorum, commonly known as Peak Range wattle,[2] is a species of flowering plant in the family Fabaceae and is endemic to the Gemini Mountains in central-eastern Queensland, Australia. It is a shrub with narrowly egg-shaped phyllodes with the narrower end towards the base, spherical heads of 20 to 25 flowers, and leathery pods up to 30mm (1.2in) long.
Acacia castorum is a shrub that typically grows to a height of up to 3m (9.8ft) and has few branchlets that are covered with hairs pressed against the surface. Its phyllodes are narrowly egg-shaped with the narrower end towards the base, 5–9mm (0.20–0.35in) long, 1.5–2.4mm (0.059–0.094in) wide with a small point near the end, and narrowly triangular stipules0.4–1mm (0.016–0.039in) long at the base. The flowers are borne in axils in spherical heads on a peduncle10–12mm (0.39–0.47in) long, each head with 20 to 25 flowers. The pods are leathery, up to about 30mm (1.2in) long and 8mm (0.31in) wide with a powdery white bloom containing up to 8 shiny black seeds 4.3–5.0mm (0.17–0.20in) long and 3.0–3.3mm (0.12–0.13in) wide with a club-shaped aril.[2][3]
This species of wattle is only known from Gemini Mountains in the Peak Range National Park in central-eastern Queensland, where it grows on cliff lines and steep slopes of trachyte in open woodland.[2][3]
1 2 3 Maslin, Bruce R. Kodela, Phillip G. (ed.). "Acacia castorum". Flora of Australia. Australian Biological Resources Study, Department of Climate Change, Energy, the Environment and Water: Canberra. Retrieved 13 June 2025.
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