A poisonous principle obtained from antiar.

The tree from which it is extracted is named Bohou Upas, Boa Upas, and Pohou Antiar.

They have two varieties of the tree, as in Java; the one called upas antiar, and the other, much more violent and prompt in its action, upas tieute In the preparation of the poison for use much mystery is observed by the natives, and various ingredients are mixed up with it; but as they are known to be harmless, such as onion and garlic juice, pepper, ginger, galanga, they are most probably employed to deceive the curious who might wish to ascertain the nature of this deadly composition.

This tree, according to Deschamps, is named in the country, pohou antiar; it frequently rises to the height of thirty or forty feet.