One of the presents given by the spirits to Tama-nui-a-raki. The rotu was described as a flower of the essence of a flower of great virtue.
- Tregear, Edward. (1891). Maori-Polynesian Comparative Dictionary. Wellington: Government Printer, p. 428.
- Wohlers, J. F. H. (1876). "Mythology and Tradition of the Maori." New Zealand Institute, Transactions 8:108-123, p. 113.