Bonin Pandan, Ogasawara Pandan or Pandanus boninensis is...

OGASAWARA, CHICHIJIMA, TOKYO-TO, JAPAN - 2017/07/14: Bonin Pandan, Ogasawara Pandan or Pandanus boninensis is sometimes called a screw pine because of its unusual roots. It is a species of pandan that is endemic and found only on the Ogasawara Islands. Two unusual and unique triterpenoids and alkaloids have been found to be useful in medicines were isolated from the leaves of Pandanus boninensis along with known triterpenoids and lignans. (Photo by John S Lander/LightRocket via Getty Images)