Grows from 0.3 to 4 metres high. It has phyllodes that are oblanceolate to narrowly-elliptic and straight to slightly curved, to 8 cm long; blue-green in colour.
Like many wattles, flowers are bright to deep yellow with each flower very small and produced in globular heads; although in this species the heads can be globular to short cylindrical spikes. The heads/spikes are clustered in groups (racemes) of 5 to 8, produced in the leaf axils. Flowering is August to October.
Seed pods are straight to slightly curved to 6 cm long, and about 1 cm wide.
It grows in a restricted range from Newnes district to near Robertson in the Southern Highlands of NSW, in dry sclerophyll forest, woodland or scrub, in sandy or clayey soils.
No cultivation details.
Acacias can suffer from a number of pests, including borers, scale, galls and leaf miners. Growing plants suitable to your local environment minimises these pests occurring.
Propagation is easy from scarified seed by covering with boiling water for 24 hours and discarding any seeds still floating on the surface.
Acacia from Greek acis, a thorn.
dorothea named by Joseph Henry Maiden after his daughter Dorothy. Joseph Maiden (1859–1925) was an early Australian botanist who made a major contribution to knowledge of the Australian flora, especially the genus Acacia and Eucalyptus.
It has a restricted range but not known to be at risk in the wild.