Of tuberous roots, besides those furnished from the principal genera, convolvulus, dioscorea, and arum, are those from the _bangkwang_ (dolichos bulbosus), the roots of which are much esteemed by the natives, and the _kéntang jáwa_ (ocymum tuberosum) or Java potatoe. Most of the numerous varieties of the convolvulus and dioscorea, which furnish food for the natives, have been enumerated in one of the first volumes of the Batavian Transactions. The jatropha manihot, called _úwi blanda_, or _wúdo_, has been propagated through all parts of Java, and is found growing in the hedges. The true sago of Amboina and the Eastern Islands, is found only solitary in a few low and marshy situations, and the preparation of it from the pith of the tree is not known to the inhabitants of Java: the leaves only are employed for covering houses; but from the _áren_, or sagurus rumphii, which grows abundantly in every part of the island, and on account of its variously extensive uses, ranks next in importance to the cocoa-nut, a substance is prepared, similar in all respects to the true sago of the Eastern Islands. The tops of various trees of the palm kind, which are sought after in other parts of the East as food, are, on account of the abundance of rice and other esculent vegetables, but little regarded in Java; but the young shoots of many varieties of the _bambu_ are used in the diet of the natives. Wheat and potatoes, with almost every species of European vegetables, are cultivated with success. Of the oil-giving plants a particular account will be given when describing the agriculture of the country.