The spindly and slender shrub or tree can grow to a height of and often has an open habit and a single stem. It has glabrous and reddish brown branchlets. Like most species of Acacia it has phyllodes rather than true leaves. The pale green to grey-green glabrousphyllodes have a narrowly elliptic to obovate or oblanceolate shape. The coriaceous to thinly coriaceous phyllodes have a length of and a width of with a prominent central midrib and clearlyvisiblelateral nerves. It blooms throughout the year most prolifically between May and August.
Taxonomy
A. spooneri was first described by M.C. O'Leary in 2002.