Cassinia tenuifolia, commonly known as bully bush or killmoke,[2] is a species of flowering plant in the family Asteraceae and is endemic to Lord Howe Island.

It is a dense, bushy shrub with hairy young stems, crowded linear leaves and sweetly scented flower heads arranged in corymbs.

The flower heads are 1.5–2 mm (0.059–0.079 in) wide with cream-coloured florets surrounded by four whorls of involucral bracts.

[2] Cassinia tenuifolia was first formally described in 1867 by George Bentham in Flora Australiensis.

[3][4] Cassinia tenuifolia is endemic to Lord Howe Island where it is widespread and common, especially near the coast and is sometimes considered a weed in pasture.