From Puerto Cabello we returned to the Aragua valley, and stopped again at the Barbula plantation through which the new road to Nueva Valencia will pass. Weeks before we had been told about a tree whose sap is a nourishing milk. They call it the 'cow tree', and assured us that negroes on the estates drank quantities of this vegetable milk. As the milky juices of plants are acrid, bitter and more or less poisonous, it seemed hard to believe what we heard, but during our stay in Barbula we proved that nobody had exaggerated the properties of palo de vaca. This fine tree is similar to the Chrysophyllum cainito (broad-leafed star-apple). When incisions are made in the trunk it yields abundant glutinous milk; it is quite thick, devoid of all acridity, and has an agreeable balmy smell. It was offered to us in tutuma-fruit - or gourd - bowls, and we drank a lot before going to bed, and again in the morning, without any ill effects. Only its viscosity makes it a little disagreeable. Negroes and free people who work on the plantations dip their maize and cassava bread in it. The overseer of the estate told us that negroes put on weight during the period that the palo de vaca exudes milk. This notable tree appears to be peculiar to the cordillera Coast At Caucagua the natives called it the 'milk tree'. They say they can recognize the trunks that yield most juice from the thickness and color of the leaves. No botanist has so far known this plant.