Apure, a river of Venezuela, has its sources in Colombia, in the eastern chain of the Andes, flows between the provinces of Varinas and Apure in an E. N. E. direction, receiving the waters of the Portuguesa, Guarico, and other affluents from the north, flows then E. S. E., and unites with the Orinoco, of which it is an important tributary, in lat. 7° 40' N., lon. 66° 45' W. According to Humboldt, its mean descent is about 14 inches to the mile; but the current in the lower part of its course is hardly perceptible, and any rise in the waters of the Orinoco causes it to overflow its banks. The lands thus overflowed yield, after the water has retired, a rich and excellent pasturage.