Acacia hamiltoniana is a large shrub to 3 m high, and its distribution is in the Great Dividing Range and the associated foothills in western New South Wales, from around Rylstone in the north, down to around the Clyde River in the south where it is growing in sandy or loamy soils as well as sandstone outcrops.
It has smooth, green variable phyllodes that have a linear to linear-oblanceolate or narrowly elliptic shape with a length to 8 cm and a width to 0.5 cm
Flowers are produced in globular heads, about 5 mm in diameter, with up to 15 very small, staminate flowers per head. Up to 11 heads are produced per raceme, emerging from leaf axils, between August and September.
Seed pods are black with a length of about 6 cm and a width of 1 cm.
No details currently available of home cultivation. Likely needs a free-draining soil to thrive.
Acacias can suffer from a number of pests, including borers, scale, galls and leaf miners. Growing plants suitable to your local environment minimises these occurring.
Propagation is easy from scarified seed by covering with boiling water for 24 hours and discarding any seeds still floating on the surface.
Many wattles regenerate from seed after fire and some exhibit suckering from roots.
Acacia – from Greek akis, meaning a thorn or “thorny”.
hamiltoniana – named after Arthur Andrew Hamilton, (1855-1929) who was an Australian botanist. who collected the type specimen from around Leura in 1907.
Not considered to be at risk in the wild.