It is an erect shrub with linear leaves and small white flowers with eight to fifteen stamens.

Flowering occurs in most months, especially in spring and summer, and the fruit is a cup-like capsule about 2 mm (0.079 in) in diameter, containing angular seeds.

[2][3][4][5][6] Baeckea linifolia was first formally described in 1807 by Edward Rudge in Transactions of the Linnean Society of London from a specimen collected "near Port Jackson".

[10] Swamp baeckea grows in heath in damp places, often near waterfalls and gullies and is found along the coast and adjacent ranges from south-east Queensland through New South Wales to the Cann River in north-eastern Victoria where it is rare.

[5] This baeckea is reasonably well known in gardens and is a hardy plant in well-drained soil in a sunny or part-shaped situation.