NAVEL-WORT; a genus of the pentagynia order, belonging to the decandra class of plants. There are eight species, most of them hardy succulent perennials; though some require to be kept in a stove, as being natives of warm climates. They rise from half a foot to a yard and an half high, and are adorned with yellow flowers growing in umbels. They are easily propagated either by seed or cuttings of their branches.