We see a small plant with linear leaves, and a stalk not thicker than a crow's quill; on digging down a foot or eighteen inches beneath, we come to a tuber, often as large as the head of a young child; when the rind is removed, we find it to be a mass of cellular tissue, filled with fluid much like that in a young turnip.

Owing to the depth beneath the soil at which it is found, it is generally deliciously cool and refreshing.

Another kind, named Mokuri, is seen in other parts of the country, where long-continued heat parches the soil.

This plant is an herbaceous creeper, and deposits under ground a number of tubers, some as large as a man's head, at spots in a circle a yard or more, horizontally, from the stem.

The natives strike the ground on the circumference of the circle with stones, till, by hearing a difference of sound, they know the water-bearing tuber to be beneath.