Bidens cosmoides, commonly called Cosmosflower beggarticks, is a species of flowering plant in the Asteraceae (sunflower) family. It is native to the Mesia mixed wood forests at altitudes of 610-910 m (2, 000-3, 000 feet) on Kauai, Hawaii.
There are about 19 species in the Bidens genus. This specific member of the Bidens genus is much larger than its relatives.
Unlike its smaller relatives, collectively known as kookoolau or kokoolau in the Hawaiian language, Cosmos flower beggarticks are so striking and distinctive that the locals have given it its own name – poola nui meaning grand poola.
This is because the leaves and habits of Cosmosflower beggarticks are somewhat similar to Poola (Claoxylon sandwicense), but unlike this plant, Poola nui has striking yellow flowers.