It is a small to medium-sized shrub with hairy foliage, needle-shaped leaves, and dense heads of off-white to cream-coloured flowers arranged in corymbs.

[2][3][4] Cassinia tegulata was first formally described in 2004 by Anthony Edward Orchard in Australian Systematic Botany from specimens collected near Narracoorte in 2004.

[5] Avenue cassinia grows in the shrubland, in roadside vegetation and in wetland between sand dunes.

It occurs near Edenhope in far western Victoria and in Lucindale and Blackford in far south-eastern South Australia.

The main threats to the species include land clearing and roadwork maintenance,[2] but fire has been shown to be a useful tool in regeneration of seedlings.