Triumfetta rhomboidea, commonly known as diamond burbark,[2] Chinese bur, or kulutkulutan in Tagalog, is a shrub that is extensively naturalised in tropical regions.

The taxon was first formally described in 1760 by botanist Nikolaus von Jacquin.

[5] Various sources give the number of stamens as being between 8 and 15.

[6][7][8][9] The fruit is round to slightly ovoid[8] and about 6 millimetres (0.2 in) in diameter with smooth spines which are about 2 millimetres (0.1 in) long.

[3] The stems are covered in star-shaped (stellate) hairs.