The phyllodes of A. lineata are dark green, sparsely to densely hairy, often sticky, slightly clustered, tough and erect; ending in a small point 0.7-2.5 cm long to 1-3mm wide.

[5][3][6][7] The inflorescence is a bright yellow ball 4-6mm in diameter, containing 10-16 flowers on a slim stalk 2.5-10mm long (singly or in pairs), growing out from the base of the phyllodes.

[5][6][7] The seed pod or legumes are curved and can be flat or twisted, 2–6 cm long and 2-4mm wide, turning from green to a dark brown when mature and papery in texture.

[11] A. lineata grows in a variety of habitats such as sclerophyll forest and woodland, but mostly occurs in mallee communities.

[7] Having phyllodes instead of leaves help A. lineate to survive in dry semi-arid environments, by reducing water loss.

[12][13] Acacias are able to fix nitrogen in the soil via a host bacteria that live on the roots called rhizobia, which aids in the growth of other plant species.

It prefers temperate regions, is moderately drought and frost tolerant, and will grow from a seed or cutting.