Vegetable ivory

Vegetable ivory or tagua nut is a product made from the very hard white endosperm of the seeds of certain palm trees. Vegetable ivory is named for its resemblance to elephant ivory. Species in the genus Phytelephas, native to South America, are the most important sources of vegetable ivory. The seeds of Metroxylon amicarum, from Micronesia, and Hyphaene ventricosa, from Africa, are also used to produce vegetable ivory.