Acacia decurrens, Early Black Wattle

Image/s
Category
Large shrubs and trees
Scientific Name
Acacia decurrens
Common Name/s
Early Black Wattle
Weed Information

Threat: High threat environmental weed.

Description: A small perennial tree or large shrub, 4–12 metres tall, often with a dense rounded form and large branches, and native to eastern New South Wales.

Flowers: Round bright yellow flower heads July to September.

Fruits: Hard black seeds form in long straight narrow pods 5–11cm long x 4–7mm wide.

Leaves: Leaves are mid green, bipinnate (fine, ‘fern-like’) with well separated individual leaflets (pinnae) with regular glands that extend through the middle of the rachis (main stem).

Stems: Winged ridges extend from the base of the leaf on both sides down the length of the branch which gives the branch a squarish angular appearance. Bark can be smooth to deeply fissured, brown or dark grey to blackish.

Note: A relatively short-lived species which declines in vigour after 10–15 years.

Similar indigenous species: Late Black Wattle (Acacia mearnsii) or Silver Wattle (Acacia dealbata). Early Black Wattle is distinguished by more open arrangement of leaflets.

Control measures: Cut and paint or drill/frill and fill with suitable herbicide.

Dispersal: Ants, birds.