A strange variety of indigenous wild legumes, belonging probably to the cow-pea tribe, is found growing luxuriantly in the low sandy soil of the southwestern coast. The vine forms a splendid cover crop of which cattle are very fond, while the peas, although small, are delicious eating. Plants of the lily family are found in great quantities in some of the fresh water lagoons of this Province, the ashes of which furnish 60% of high-grade potash. Back in the mountains of Pinar del Rio, an exploring party from the Experimental Station came across, most unexpectedly, a little group of five immense black walnut trees. No one knows whence came the seed from which they sprung, since the district has never been settled, and the black walnut is not known in any other part of the Island. It is quite probable that many, if not all, of the forest trees of a commercial value in the Gulf States, and perhaps further north, would thrive in Cuba if planted there. There is much fine, valuable hard-wood timber in the mountain ranges of Pinar del Rio, between Vinales and Bahia Honda, but lack of facility for the removal to the coast will probably cause it to remain unmolested for some years to come. The extreme length of Pinar del Rio, from southwest to northeast, in a straight line, is nearly two hundred miles, while its average width is fifty. The rivers and streams all have their sources in the central divide, and flow to the north and south, emptying into the Gulf of Mexico and the Caribbean Sea. None of these, of course, are available for navigation more than a few miles up from their mouths, and while serving as drainage streams during the rainy season, many of them, unfortunately, cease to flow during the dry months of February and March. Some of them, with sources in large springs, back in the mountains, could be used very advantageously, with small expense, for irrigation purposes, thus rendering adjoining lands, especially in the tobacco and vegetable district, doubly valuable. With the control of the water supply, the profit to be made from these lands, on which three or four crops may be gathered a year, would seem almost incredible, especially if compared with the returns of similar lands in the United States.