Senna notabilis, commonly known as cockroach bush,[2] is a species of flowering plant in the legume family Fabaceae, and is endemic to northern Australia.

It is an erect, softly-hairy, annual or perennial shrub with pinnate leaves with six to twelve pairs of lance-shaped leaflets, and yellow flowers arranged in groups of twenty to thirty, with seven fertile stamens in each flower.

There are bristly, egg-shaped stipules at the base of the petiole and small glands between most pairs of leaflets.

[3][4][5][6] Cockroach bush was first formally described in 1862 by Ferdinand von Mueller who gave it the name Cassia notabilis in Fragmenta Phytographiae Australiae from specimens collected by John McDouall Stuart.

[10] Senna notabilis occurs in all mainland states and territories except Victoria, and grows in a range of arid habitats, including rocky hillsides, clays and deep desert sands.