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silver wattle (Acacia dealbata subsp. dealbata) has young branches and foliage tips that are finely hairy and whitish-green or whitish-yellow in colour (i.e. pruinose). Its silvery-grey leaves have numerous (10-30) pairs of hairy branchlets (i.e. pinnae). These leaves are shortly stalked (i.e. petiolate) and there is usually a small raised structure (i.e. gland) near the top of this leaf stalk (i.e. petiole). There are also similar glands at the junction of the each of the pairs of branchlets (i.e. jugary glands). The leaflets are relatively small (1.5-6 mm long) and usually quite elongated in shape. Its flowers are yellow or golden yellow and borne in small globular clusters, which are arranged into larger elongated compound clusters (i.e. racemes or panicles). The pods are relatively large (20-115 mm long and 6-14 mm wide).

Note: Another form of this species (i.e. Acacia dealbata subsp. subalpina), which is often smaller in stature with smaller leaves and leaflets, grows mainly at higher altitudes in south-eastern New South Wales, the ACT and north-eastern Victoria (e.g. in the Snowy Mountains). However, Acacia dealbata subsp. subalpina has not become naturalised outside its native range and will not be mentioned any further here.

dwarf silver wattle (Acacia nanodealbata) has young branches and foliage tips that are finely hairy and yellow or greenish-yellow in colour (i.e. not pruinose). Its dark green leaves have numerous (6-26) pairs of mostly hairless branchlets (i.e. pinnae). These leaves are shortly stalked (i.e. petiolate) and there is sometimes a small raised structure (i.e. gland) near the top of this leaf stalk (i.e. petiole). There are also prominent glands at the junction of all of the pairs of branchlets (i.e. jugary glands). The leaflets are very small (1-2.5 mm long) and usually not particularly elongated in shape. Its flowers are golden yellow and borne in small globular clusters, which are arranged into larger elongated compound clusters (i.e. racemes or panicles). The pods are relatively large (30-85 mm long and 9-20 mm wide).