Tetratheca thymifolia, commonly known as black-eyed Susan or thyme pink-bells, is a small shrub in the family Elaeocarpaceae found in southeastern Australia.

[2] The genus name is derived from the Ancient Greek tetra "four", and theke "sac, box" and relates to the four-celled anthers.

[2] The species occurs in southeastern Queensland, through New South Wales and into East Gippsland in eastern Victoria, where it is found in heathland or eucalyptus woodland on sandy soils.

Several forms have been selected for horticulture, including T. 'Bicentennial Belle',[2] which originates from a naturally occurring population near Bega, New South Wales.

Overall, Tetratheca thymifolia does best in well-drained acidic soils in a sunny or semi-shaded aspect, and tolerates light frosts.