Triumfetta rhomboidea, commonly known as diamond burbark, Chinese bur, or kulutkulutan in Tagalog, is a shrub that is extensively naturalised in tropical regions.[1] It is thought that to have come to Australia from China.[1] Its bark—sometimes called burbark--makes a kind of jute.
The taxon was first formally described in 1760 by botanist Nikolaus von Jacquin.[2]
Various sources give the number of stamens as being between 8 and 15.The fruit is round to slightly ovoid and about 6mm in diameter with smooth spines which are about 2mm long.[1] The stems are covered in star-shaped (stellate) hairs.Its embryology was described by Venkata Rao in 1952.