Acacia penninervis

Acacia penninervis, commonly known as hickory wattle, mountain hickory, or blackwood, is a perennial shrub or tree 2–8m high, which is native to Australia.

Its uses include environmental management. The tannin content of the bark is approximately 18%.

It occurs in the Australian states of Australian Capital Territory, New South Wales, Queensland and Victoria, and as an introduced species on New Zealand's North Island and South Island. The variety A. p. var. penninervis occurs in the same Australian states of Australian Capital Territory, New South Wales, Queensland, and Victoria. The variety A. p. var. longiracemosa occurs in coastal districts of southern Queensland, and northern New South Wales.